An error when i switched from python v2.6.6 = v3.2.3
Today i switched to Python v3.2.3 on my remote web server at HostGator. My cgi-script which it works at python v2.6.6 now produces theses errors: -- -- Traceback (most recent call last): File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 171, in execute r = self._query(query) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 330, in _query rowcount = self._do_query(q) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 294, in _do_query db.query(q) _mysql_exceptions.ProgrammingError: (1064, You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%s' at line 1) During handling of the above exception, another exception occurred: Traceback (most recent call last): File metrites.py, line 211, in module cur.execute( '''SELECT hits FROM counters WHERE url = %s''', (htmlpage,) ) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 184, in execute self.errorhandler(self, exc, value) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/connections.py, line 36, in defaulterrorhandler raise errorclass(errorvalue) _mysql_exceptions.ProgrammingError: (1064, You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%s' at line 1) Even cursor.execute changes in python v3 ? What are these errors about? -- http://mail.python.org/mailman/listinfo/python-list
Re: Insert comma in number?
2013/3/7 Peter Otten __pete...@web.de: Last not least there's the option to employ locale-aware formatting: import locale locale.setlocale(locale.LC_ALL, en_US.UTF-8) 'en_US.UTF-8' locale.format(%d, 12345, grouping=True) '12,345' In German usage of . and , is reversed, so: locale.setlocale(locale.LC_ALL, de_DE.UTF-8) 'de_DE.UTF-8' locale.format(%d, 12345, grouping=True) '12.345' Does this locale-aware example only work on UNIX? -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
Hi, but now iam receiving this error concering except: ni...@superhost.gr [~/www/cgi-bin]# /usr/bin/python3 metrites.py File metrites.py, line 88 except MySQLdb.Error, e: ^ SyntaxError: invalid syntax ni...@superhost.gr [~/www/cgi-bin]# which used to work ok in v2.6.6 can you help? Python 3 introduced some Python 2-incompatible changes. So, please read: http://docs.python.org/release/3.0.1/whatsnew/3.0.html Roland -- http://mail.python.org/mailman/listinfo/python-list
Re: Insert comma in number?
Paul Volkov wrote: 2013/3/7 Peter Otten __pete...@web.de: Last not least there's the option to employ locale-aware formatting: import locale locale.setlocale(locale.LC_ALL, en_US.UTF-8) 'en_US.UTF-8' locale.format(%d, 12345, grouping=True) '12,345' In German usage of . and , is reversed, so: locale.setlocale(locale.LC_ALL, de_DE.UTF-8) 'de_DE.UTF-8' locale.format(%d, 12345, grouping=True) '12.345' Does this locale-aware example only work on UNIX? If you have Windows in mind: I don't know what it takes to get multiple locales on a Windows system, but for the default locale that you can specify with locale.setlocale(locale.LC_ALL, ) it should work. -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
Τη Πέμπτη, 7 Μαρτίου 2013 10:58:13 π.μ. UTC+2, ο χρήστης Roland Koebler έγραψε: Hi, but now iam receiving this error concering except: ni...@superhost.gr [~/www/cgi-bin]# /usr/bin/python3 metrites.py File metrites.py, line 88 except MySQLdb.Error, e: ^ SyntaxError: invalid syntax ni...@superhost.gr [~/www/cgi-bin]# which used to work ok in v2.6.6 can you help? Python 3 introduced some Python 2-incompatible changes. So, please read: http://docs.python.org/release/3.0.1/whatsnew/3.0.html Roland I did read about print but i'm interesetd to see and its not mentioned there how except MySQLdb.Error, e: print ( Query Error: , sys.exc_info()[1].excepinfo()[2] ) is supposed to be written as in Python v3.x -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Any ideas about the error please? I can assure you all the statemnt are correct ebcause they work in python v2.6.6 -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
Νίκος Γκρ33κ nikos.gr...@gmail.com writes: I did read about print but i'm interesetd to see and its not mentioned there how except MySQLdb.Error, e: print ( Query Error: , sys.exc_info()[1].excepinfo()[2] ) is supposed to be written as in Python v3.x Read better: http://docs.python.org/release/3.0.1/whatsnew/3.0.html#changed-syntax 4th (bullet) point. ciao, lele. -- nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia. l...@metapensiero.it | -- Fortunato Depero, 1929. -- http://mail.python.org/mailman/listinfo/python-list
iterating over a list as if it were a circular list
I was wondering what the best approach for the following might be. Say you have a list P of points and another list N of other items. You can always assume that len(N) = len(P) Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. So far I've got for point in points: -- ./Sven -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over a list as if it were a circular list
On Thu, Mar 7, 2013 at 8:23 PM, Sven sven...@gmail.com wrote: Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. Check out itertools.cycle, it should do what you want. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
iterating over a list as if it were a circular list
Stupid keyboard shortcuts, sent it too early. Apologies I was wondering what the best approach for the following might be. Say you have a list P of points and another list N of other items. You can always assume that len(N) = len(P) Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. So far I've got (pseudo code) i = 0 for point in points: put N[i] at point if i len(N): i = 0 is this the most pythonic way to accomplish this? Additionally, what if I wanted to pull a random element from N, but I want to ensure all elements from N have been used before starting to pick already chosen random elements again. So far I thought of duplicating the list and removing the randomly chosen elements from the list, and when it's empty, re-copying it. But that seems a little wrong if you know what I mean. -- ./Sven -- http://mail.python.org/mailman/listinfo/python-list
Re: Unable to connect to internet URL behind firewall
On 6 March 2013 16:28, priyanka.khaman...@gmail.com wrote: Hi, I am using below two approaches to connect to read the content of internet url. These two approaches work for me when the internet explorer session is open. When the internet explorer window is closed, below code gives me 407 error. I have also set the HTTP_PROXY environment variables as http://proxy-example.com:3128 From experience the environment variable name is in lowercase. Try http_proxy instead. Don't ask me why this environment variable is lowercase when most others aren't. -- ./Sven -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
Τη Πέμπτη, 7 Μαρτίου 2013 11:22:09 π.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε: Νίκος Γκρ33κ nikos.gr...@gmail.com writes: I did read about print but i'm interesetd to see and its not mentioned there how except MySQLdb.Error, e: print ( Query Error: , sys.exc_info()[1].excepinfo()[2] ) is supposed to be written as in Python v3.x Read better: http://docs.python.org/release/3.0.1/whatsnew/3.0.html#changed-syntax 4th (bullet) point. ciao, lele. -- nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia. l...@metapensiero.it | -- Fortunato Depero, 1929. please give me the exact link to read, i cant seem to find it although you send 4th bullet i do not see it -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is Ruby on Rails more popular than Django?
rusi wrote: Anyone who's used emacs will know this as the bane of FLOSS software -- 100 ways of doing something and none perfect -- IOW too much spurious choice. This is a fallacy. Just because someone claims that there are 100 ways of doing something and none perfect, it doesn't mean that restricting choice leads to perfection. It doesn't. It only leads to getting stuck with a poor solution with no possibility of improving your life by switching to a better alternative. Worse, a complete lack of alternatives leads to a complete lack of competition, and therefore the absense of incentives to work on improvements. You know, progress. Choice is good. Don't pretend it isn't. It's one of the reasons we have stuff like Python or Ruby nowadays, for example. Rui Maciel -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over a list as if it were a circular list
On Mar 7, 2013 1:24 AM, Sven sven...@gmail.com wrote: I was wondering what the best approach for the following might be. Say you have a list P of points and another list N of other items. You can always assume that len(N) = len(P) Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. Untested due to the late hour: import itertools for p, n in itertools.izip(P, itertools.cycle(N)): # do whatever -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over a list as if it were a circular list
On 7 March 2013 09:31, Chris Rebert c...@rebertia.com wrote: On Mar 7, 2013 1:24 AM, Sven sven...@gmail.com wrote: I was wondering what the best approach for the following might be. Say you have a list P of points and another list N of other items. You can always assume that len(N) = len(P) Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. Untested due to the late hour: import itertools for p, n in itertools.izip(P, itertools.cycle(N)): # do whatever I knew there was a more sensible way to do it. Thanks. -- ./Sven -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over a list as if it were a circular list
On Mar 7, 2013 1:29 AM, Sven sven...@gmail.com wrote: Stupid keyboard shortcuts, sent it too early. Apologies I was wondering what the best approach for the following might be. Say you have a list P of points and another list N of other items. You can always assume that len(N) = len(P) Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. snip Additionally, what if I wanted to pull a random element from N, but I want to ensure all elements from N have been used before starting to pick already chosen random elements again. So far I thought of duplicating the list and removing the randomly chosen elements from the list, and when it's empty, re-copying it. But that seems a little wrong if you know what I mean. Just iterate over the list in order, and random.shuffle() the list each time you reach the end of it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
Τη Πέμπτη, 7 Μαρτίου 2013 11:50:42 π.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε: Νίκος Γκρ33κ nikos.gr...@gmail.com writes: Τη Πέμπτη, 7 Μαρτίου 2013 11:22:09 π.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε: http://docs.python.org/release/3.0.1/whatsnew/3.0.html#changed-syntax 4th (bullet) point. please give me the exact link to read, i cant seem to find it although you send 4th bullet i do not see it Oh come on Νίκος, the above *is* the *exact* link to read, I even pointed at the right subparagraph: it contains both a link to the reference manual for the except keyword, and a link to the PEP that talks about the change. ciao, lele. -- nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia. l...@metapensiero.it | -- Fortunato Depero, 1929. call me an idiot but is till dont see it: i;am currently trying this: except MySQLdb.OperationalError, e: but give sme an internal server error too :( -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
Νίκος Γκρ33κ nikos.gr...@gmail.com writes: Τη Πέμπτη, 7 Μαρτίου 2013 11:22:09 π.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε: http://docs.python.org/release/3.0.1/whatsnew/3.0.html#changed-syntax 4th (bullet) point. please give me the exact link to read, i cant seem to find it although you send 4th bullet i do not see it Oh come on Νίκος, the above *is* the *exact* link to read, I even pointed at the right subparagraph: it contains both a link to the reference manual for the except keyword, and a link to the PEP that talks about the change. ciao, lele. -- nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia. l...@metapensiero.it | -- Fortunato Depero, 1929. -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is Ruby on Rails more popular than Django?
On 7 March 2013 09:28, Rui Maciel rui.mac...@gmail.com wrote: rusi wrote: Anyone who's used emacs will know this as the bane of FLOSS software -- 100 ways of doing something and none perfect -- IOW too much spurious choice. This is a fallacy. Just because someone claims that there are 100 ways of doing something and none perfect, it doesn't mean that restricting choice leads to perfection. It doesn't. It only leads to getting stuck with a poor solution with no possibility of improving your life by switching to a better alternative. This thread reminds me of an article I read recently: http://rubiken.com/blog/2013/02/11/web-dev-a-crazy-world.html It's mostly a matter of having enough time to evaluate what's best for you. In the case of RoR vs Django, you will (assuming zero knowledge) need to learn a language, then a framework. That's quite a time consuming task. Personally I've opted for Django because I've used Python for years. I've written some Ruby in the past, but I not enough to make me choose RoR over Django to get stuff done. -- ./Sven -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
This fails also: except MySQLdb.ProgrammingError, e: How on earth the exception is suppsoed to be written -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
On Thu, Mar 7, 2013 at 8:50 PM, Lele Gaifax l...@metapensiero.it wrote: Νίκος Γκρ33κ nikos.gr...@gmail.com writes: Τη Πέμπτη, 7 Μαρτίου 2013 11:22:09 π.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε: http://docs.python.org/release/3.0.1/whatsnew/3.0.html#changed-syntax 4th (bullet) point. please give me the exact link to read, i cant seem to find it although you send 4th bullet i do not see it Oh come on Νίκος, the above *is* the *exact* link to read, I even pointed at the right subparagraph: it contains both a link to the reference manual for the except keyword, and a link to the PEP that talks about the change. I think it's time to take him up on his offer to call him an idiot :) Nikos, try 'as'. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
On Thu, Mar 7, 2013 at 5:09 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: This fails also: except MySQLdb.ProgrammingError, e: How on earth the exception is suppsoed to be written Change from excepthttp://docs.python.org/release/3.0.1/reference/compound_stmts.html#except *exc*, *var* to excepthttp://docs.python.org/release/3.0.1/reference/compound_stmts.html#except *exc* ashttp://docs.python.org/release/3.0.1/reference/compound_stmts.html#as *var*. See *PEP 3110* http://www.python.org/dev/peps/pep-3110. So change the comma to the word 'as' -- http://mail.python.org/mailman/listinfo/python-list -- Joel Goldstick http://joelgoldstick.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
Τη Πέμπτη, 7 Μαρτίου 2013 12:19:05 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: On Thu, Mar 7, 2013 at 8:50 PM, Lele Gaifax l...@metapensiero.it wrote: Νίκος Γκρ33κ nikos.gr...@gmail.com writes: Τη Πέμπτη, 7 Μαρτίου 2013 11:22:09 π.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε: http://docs.python.org/release/3.0.1/whatsnew/3.0.html#changed-syntax 4th (bullet) point. please give me the exact link to read, i cant seem to find it although you send 4th bullet i do not see it Oh come on Νίκος, the above *is* the *exact* link to read, I even pointed at the right subparagraph: it contains both a link to the reference manual for the except keyword, and a link to the PEP that talks about the change. I think it's time to take him up on his offer to call him an idiot :) Nikos, try 'as'. ChrisA Thank you all the trick was to replace the comma with the 'as' script is almost ready for Python v3.2.3 now! ima just receivign this error: -- -- Traceback (most recent call last): File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 171, in execute r = self._query(query) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 330, in _query rowcount = self._do_query(q) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 294, in _do_query db.query(q) _mysql_exceptions.ProgrammingError: (1064, You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%s' at line 1) During handling of the above exception, another exception occurred: Traceback (most recent call last): File metrites.py, line 212, in module cur.execute( '''SELECT hits FROM counters WHERE url = %s''', (htmlpage,) ) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/cursors.py, line 184, in execute self.errorhandler(self, exc, value) File /opt/python3/lib/python3.2/site-packages/MySQL_python-1.2.3-py3.2-linux-x86_64.egg/MySQLdb/connections.py, line 36, in defaulterrorhandler raise errorclass(errorvalue) _mysql_exceptions.ProgrammingError: (1064, You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%s' at line 1) Tou cna see it more clearly at my website http://superhost.gr -- http://mail.python.org/mailman/listinfo/python-list
3.3.1 release date?
Hi, When is the 3.3.1 final due? I have found this [http://python.org/dev/peps/pep-0398/#id1], but the info doesn't seem up to date. Is there a better source of this info? Thanks, Sam -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
Tim Chase python.list at tim.thechases.com writes: On 2013-03-06 22:20, Roy Smith wrote: I stumbled upon an interesting bit of trivia concerning lists and list comprehensions today. A little testing shows that this can be rewritten as my_objects = list(iter(my_query_set)) which seems to then skip the costly __len__ call. Performance geeks are welcome to time it against the list-comprehension version class Foo(object): def __init__(self): self.items = range(10) def __iter__(self): return iter(self.items) def __len__(self): print Calling costly __len__ return len(self.items) Well, it skips the costly len() call because your iter(Foo()) returns iter(range()) under the hood and list() uses that object's __len__() method. In most cases, such a workaround will not be feasible. Why should iter(QuerySet()) have a faster __len__() method defined than QuerySet() itself. Most likely, iter(QuerySet()) just returns self anyway? Best, Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 11:06:27 π.μ. UTC+2, ο χρήστης Νίκος Γκρ33κ έγραψε: Any ideas about the error please? I can assure you all the statemnt are correct ebcause they work in python v2.6.6 can someone help this issue so my webiste will get back on working plz? -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Thu, 07 Mar 2013 12:27:03 +0100, Νίκος Γκρ33κ nikos.gr...@gmail.com
wrote:
Τη Πέμπτη, 7 Μαρτίου 2013 11:06:27 π.μ. UTC+2, ο χρήστης Νίκος Γκρ33κ
έγραψε:
Any ideas about the error please?
I can assure you all the statemnt are correct ebcause they work in
python v2.6.6
can someone help this issue so my webiste will get back on working plz?
MySQLdb is python 2 only.
MySQL-3.23 through 5.0 and Python-2.3 through 2.7 are currently
supported. Python-3.0 will be supported in a future release.
Maybe try this one:
https://pypi.python.org/pypi/mysql-connector-python/1.0.9
Alternatively,
forget about subprocess.check_output,
call your metrites.py with os.system('python metrites.py some-temp-file')
and have it write its output to some-temp-file,
and read some-temp-file back into your template?
--
http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0] Why this line that worked in v2.6 give sme an error in v3.2.3 Traceback (most recent call last): File files.py, line 14, in lt;modulegt; host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0] File /opt/python3/lib/python3.2/os.py, line 450, in __getitem__ value = self._data[self.encodekey(key)] KeyError: b'REMOTE_ADDR' -- -- http://mail.python.org/mailman/listinfo/python-list
Re: 3.3.1 release date?
On 3/7/2013 6:02 AM, sferen...@gmail.com wrote: Hi, When is the 3.3.1 final due? I have found this [http://python.org/dev/peps/pep-0398/#id1], but the info doesn't seem up to date. Is there a better source of this info? No. There are lingering issues that were expected to be resolved already, but have not been. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
An these kind of errors iam receiving to please: Original exception was: Traceback (most recent call last): File pelatologio.py, line 230, in module ''') % (clients, hits, money) UnicodeEncodeError: 'ascii' codec can't encode characters in position 102-108: ordinal not in range(128) in python v2.6.6 this code works and now i'am using: #!/usr/bin/python3 # -*- coding: utf-8 -*- -- http://mail.python.org/mailman/listinfo/python-list
Re: Inserting-embedding some html data at the end of a .py file
On Thu, Mar 7, 2013 at 11:06 PM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: An these kind of errors iam receiving to please: Part of being a computer programmer is learning to solve problems. Dumping piles of problems onto a list like this isn't the best way to do this. Either pay someone to do the work (there are plenty of web sites that will help you find freelance programmers), or learn to do it yourself. Coming to a list like this should be done respectfully - knowing that you're asking people to devote dev hours for no return - and preferably in accordance with: http://www.catb.org/esr/faqs/smart-questions.html ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Creating an object that can track when its attributes are modified
Hi, maybe you could do this by a decorator on the setattr method. It should look more or less like your implementation, but in my eyes it's a cleaner and can be reused. Further, I would use a stack for each attribute, so that you can restore all previous values. bg, Johannes On 03/06/2013 05:07 PM, Ben Sizer wrote: I am trying to make an object that can track when its attributes have been assigned new values, and which can rollback to previous values where necessary. I have the following code which I believe works, but would like to know if there are simpler ways to achieve this goal, or if there are any bugs I haven't seen yet. class ChangeTrackingObject(object): def __init__(self): self.clean() def clean(self): Mark all attributes as unmodified. object.__setattr__(self, '_dirty_attributes', dict()) def dirty_vals(self): Returns all dirty values. return dict( [ (k,v) for k,v in self.__dict__.iteritems() if k in self._dirty_attributes] ) def get_changes_and_clean(self): Helper that collects all the changes and returns them, cleaning the dirty flags at the same time. changes = self.dirty_vals() self.clean() return changes def rollback(self): Reset attributes to their previous values. for k,v in self._dirty_attributes.iteritems(): object.__setattr__(self, k, v) self.clean() def __setattr__(self, key, value): # If the first modification to this attribute, store the old value if key not in self._dirty_attributes: if key in self.__dict__: self._dirty_attributes[key] = object.__getattribute__(self, key) else: self._dirty_attributes[key] = None # Set the new value object.__setattr__(self, key, value) I am aware that adding a new attribute and then calling rollback() leaves the new attribute in place with a None value - maybe I can use a special DeleteMe marker object in the _dirty_attributes dict along with a loop that calls delattr on any attribute that has that value after a rollback. I also believe that this won't catch modification to existing attributes as opposed to assignments: eg. if one of the attributes is a list and I append to it, this system won't notice. Is that something I can rectify easily? Any other comments or suggestions? Thanks, -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 1:51:42 μ.μ. UTC+2, ο χρήστης Michael Ross έγραψε:
On Thu, 07 Mar 2013 12:27:03 +0100, Νίκος Γκρ33κ nikos.gr...@gmail.com
wrote:
Τη Πέμπτη, 7 Μαρτίου 2013 11:06:27 π.μ. UTC+2, ο χρήστης Νίκος Γκρ33κ
έγραψε:
Any ideas about the error please?
I can assure you all the statemnt are correct ebcause they work in
python v2.6.6
can someone help this issue so my webiste will get back on working plz?
MySQLdb is python 2 only.
MySQL-3.23 through 5.0 and Python-2.3 through 2.7 are currently
supported. Python-3.0 will be supported in a future release.
Maybe try this one:
https://pypi.python.org/pypi/mysql-connector-python/1.0.9
Alternatively,
forget about subprocess.check_output,
call your metrites.py with os.system('python metrites.py some-temp-file')
and have it write its output to some-temp-file,
and read some-temp-file back into your template?
Yes its better for me to give upon python3 for the moment being, because all
that hassle was for makeing the subprocess command run.
Now i just followed your advice and tried:
elif htmlpage.endswith('.py'):
htmldata = os.system('/usr/bin/python ./metrites.py
/data/files/htmltemp')
but produced error tells me that:
template undefined, htmldata = -1, counter = ' centera
href=mailto:supp...@superhost.gr; ...st.gr/?show=statsfont color=cyan 0
/td\n\t\t '
whay htmldata reeturn the value '-1' when os.sytem is executed?
--
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Re: An error when i switched from python v2.6.6 = v3.2.3
On Thu, 07 Mar 2013 13:25:58 +0100, Νίκος Γκρ33κ nikos.gr...@gmail.com
wrote:
Τη Πέμπτη, 7 Μαρτίου 2013 1:51:42 μ.μ. UTC+2, ο χρήστης Michael Ross
έγραψε:
On Thu, 07 Mar 2013 12:27:03 +0100, Νίκος Γκρ33κ nikos.gr...@gmail.com
wrote:
Τη Πέμπτη, 7 Μαρτίου 2013 11:06:27 π.μ. UTC+2, ο χρήστης Νίκος Γκρ33κ
έγραψε:
Any ideas about the error please?
I can assure you all the statemnt are correct ebcause they work in
python v2.6.6
can someone help this issue so my webiste will get back on working
plz?
MySQLdb is python 2 only.
MySQL-3.23 through 5.0 and Python-2.3 through 2.7 are currently
supported. Python-3.0 will be supported in a future release.
Maybe try this one:
https://pypi.python.org/pypi/mysql-connector-python/1.0.9
Alternatively,
forget about subprocess.check_output,
call your metrites.py with os.system('python metrites.py
some-temp-file')
and have it write its output to some-temp-file,
and read some-temp-file back into your template?
Yes its better for me to give upon python3 for the moment being, because
all that hassle was for makeing the subprocess command run.
Now i just followed your advice and tried:
elif htmlpage.endswith('.py'):
htmldata = os.system('/usr/bin/python ./metrites.py
/data/files/htmltemp')
but produced error tells me that:
template undefined, htmldata = -1, counter = ' centera
href=mailto:supp...@superhost.gr; ...st.gr/?show=statsfont
color=cyan 0 /td\n\t\t '
whay htmldata reeturn the value '-1' when os.sytem is executed?
Because
On Unix, the return value is the exit status of the process encoded in
the format specified for wait().
It's in the documentation for os.system.
Which you should have read before asking here.
You may not intend it like that,
but if you ask any and all errors here, you effectively ask the list to
develop the software for you.
Seriously this is beyond the scope of volunteer help for a commercial site.
I'm bailing out.
--
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Re: Unhelpful traceback
On 03/07/2013 01:33 AM, John Nagle wrote:
Here's a traceback that's not helping:
A bit more context would be helpful. Starting with Python version.
Traceback (most recent call last):
File InfoCompaniesHouse.py, line 255, in module
main()
File InfoCompaniesHouse.py, line 251, in main
loader.dofile(infile) # load this file
File InfoCompaniesHouse.py, line 213, in dofile
self.dofilezip(infilename) # do ZIP file
File InfoCompaniesHouse.py, line 198, in dofilezip
self.dofilecsv(infile, infd)# as a CSV file
File InfoCompaniesHouse.py, line 182, in dofilecsv
for fields in reader : # read entire
CSV file
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa3' in
position 14: ordinal not in range(128)
This is wierd, becuase for fields in reader isn't directly
doing a decode. That's further down somewhere, and the backtrace
didn't tell me where.
The program is converting some .CSV files that come packaged in .ZIP
files. The files are big, so rather than expanding them, they're
read directly from the ZIP files and processed through the ZIP
and CSV modules.
Here's the code that's causing the error above:
decoder = codecs.getreader('utf-8')
with decoder(infdraw,errors=replace) as infd :
with codecs.open(outfilename, encoding='utf-8', mode='w') as
outfd :
headerline = infd.readline()
self.doheaderline(headerline)
reader = csv.reader(infd, delimiter=',', quotechar='')
for fields in reader :
pass
Normally, the pass is a call to something that
uses the data, but for test purposes, I put a pass in there. It still
fails. With that pass, nothing is ever written to the
output file, and no encoding should be taking place.
infdraw is a stream from the zip module, create like this:
with inzip.open(zipelt.filename,r) as infd :
You probably need a 'rb' rather than 'r', since the file is not ASCII.
self.dofilecsv(infile, infd)
This works for data records that are pure ASCII, but as soon as some
non-ASCII character comes through, it fails.
Where is the error being generated? I'm not seeing any place
where there's a conversion to ASCII. Not even a print.
John Nagle
If that isn't enough, then please give the whole context, such as where
zipelt and filename came from. And don't forget to specify Python
version. Version 3.x treats nonbinary files very differently than 2.x
--
DaveA
--
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Re: An error when i switched from python v2.6.6 = v3.2.3
Please tell me at least if i ahve any syntax error in this line:
htmldata = os.system('/usr/bin/python ./metrites.py /data/files/htmltemp')
please man its essential for my website to work otherwise 3 scripts i wrote
would not be able to produce proper html output that then i need to append a
string after them. her si what i want to do:
if htmlpage.endswith('.html'):
f = open( /home/nikos/www/ + htmlpage )
htmldata = f.read()
elif htmlpage.endswith('.py'):
htmldata = os.system('/usr/bin/python ./metrites.py
/data/files/htmltemp')
counter = ''' centera href=mailto:supp...@superhost.gr; img
src=/data/images/mail.png /a
centertable border=2 cellpadding=2 bgcolor=black
tdfont color=limeΑριθμός Επισκεπτών/td
tda
href=http://superhost.gr/?show=stats;font color=cyan %d /td
''' % data[0]
template = htmldata + counter
print( template )
==
Please just that i like to do it myself ut i cant, i wont ask anyhting else.
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Re: iterating over a list as if it were a circular list
In article mailman.2993.1362648214.2939.python-l...@python.org, Sven sven...@gmail.com wrote: I was wondering what the best approach for the following might be. Say you have a list P of points and another list N of other items. You can always assume that len(N) = len(P) Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. So far I've got for point in points: I'm not completely following what you're trying to do, but I think what you're looking for is some combination of zip() and itertools.cycle(). pairs = zip(P, cycle(N)) -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 12:22 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote:
Please tell me at least if i ahve any syntax error in this line:
htmldata = os.system('/usr/bin/python ./metrites.py /data/files/htmltemp')
please man its essential for my website to work otherwise 3 scripts i wrote
would not be able to produce proper html output
Yes, there is. The variable name at the beginning is wrong. To
understand why, look at the documentation for os.system().
If it's essential for your web site, why not pay someone to do the work for you?
You want free support AND you're not willing to put effort into your
questions. That's a bad combination. The sloppiness of your writing,
coupled with a clear lack of preliminary research (eg checking the
docs), suggests that you do not value the end result; you expect
someone else to do everything, to wave a magic wand and voila, your
web site works. That isn't how the world works.
Quoting from http://www.catb.org/esr/faqs/smart-questions.html
== Before you ask ==
Prepare your question. Think it through. Hasty-sounding questions get
hasty answers, or none at all. The more you do to demonstrate that having
put thought and effort into solving your problem before seeking help, the
more likely you are to actually get help.
...
== Write in clear, grammatical, correctly-spelled language ==
... If you can't be bothered to do that, we can't be bothered to pay
attention.
Spend the extra effort to polish your language. It doesn't have to be stiff or
formal - in fact, hacker culture values informal, slangy and humorous
language used with precision. But it has to be precise; there has to be
some indication that you're thinking and paying attention.
... if you write like a semi-literate boob you will very likely be ignored.
ChrisA
--
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Re: An error when i switched from python v2.6.6 = v3.2.3
But iam tryign dayd for this i even tryign to chnage my 3 script to python v3.2.3 just to get subprocess up and running all the above fail: htmldata = os.system(python metrites.py '/data/files/htmltemp') How can i tell system to send metritis.py's output to a temporary file called htmltemp so in the next step i can do what iam trying 3 days now to do: template = htmldata + counter os.system is very vague while i need specific help with this. if you provide me a link that describes my case of things i';; for sure read it. -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 12:56 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: But iam tryign dayd for this i even tryign to chnage my 3 script to python v3.2.3 just to get subprocess up and running all the above fail: htmldata = os.system(python metrites.py '/data/files/htmltemp') How can i tell system to send metritis.py's output to a temporary file called htmltemp so in the next step i can do what iam trying 3 days now to do: template = htmldata + counter os.system is very vague while i need specific help with this. if you provide me a link that describes my case of things i';; for sure read it. You are panicking about specific problems. Take a deep breath, take a step back, and look at what's going on. If you've really been trying for three days to make this work, it won't cost you much more to spend three minutes polishing your email before you send it... or those same three minutes reading the docs and finding what you want. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 4:01:13 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: You are panicking about specific problems. Take a deep breath, take a step back, and look at what's going on. If you've really been trying for three days to make this work, it won't cost you much more to spend three minutes polishing your email before you send it... or those same three minutes reading the docs and finding what you want. Iam willing to read some document that describe what iam dealing with, please provid eme a link and aill read it I think its an OS issue and not statment issue. iam starting to hink that maybe python metritis.py /data/files/htmltemp might work. i will try this now as we speak.lets hope for God;s sake it will work! -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
I made some progress!!! Now the htmldata's value its not -1 but 256!!! look the error after trying this: htmldata = os.system(python metrites.py '/data/private/htmltemp') template undefined, htmldata = 256, counter = ' centera href=mailto:supp...@superhost.gr; ...st.gr/?show=statsfont color=cyan 0 /td\n\t\t ' type 'exceptions.TypeError': unsupported operand type(s) for +: 'int' and 'str' args = (unsupported operand type(s) for +: 'int' and 'str',) message = unsupported operand type(s) for +: 'int' and 'str' -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 1:11 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Τη Πέμπτη, 7 Μαρτίου 2013 4:01:13 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: You are panicking about specific problems. Take a deep breath, take a step back, and look at what's going on. If you've really been trying for three days to make this work, it won't cost you much more to spend three minutes polishing your email before you send it... or those same three minutes reading the docs and finding what you want. Iam willing to read some document that describe what iam dealing with, please provid eme a link and aill read it http://www.google.com/ I think its an OS issue and not statment issue. I think it's a pebkac issue. iam starting to hink that maybe python metritis.py /data/files/htmltemp might work. i will try this now as we speak.lets hope for God;s sake it will work! Tip: Next time, try it first, THEN post. This is not IRC. You don't need to tell us that you're trying, and that you're panicking still further. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 1:13 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: I made some progress!!! Now the htmldata's value its not -1 but 256!!! look the error after trying this: htmldata = os.system(python metrites.py '/data/private/htmltemp') Go check the docs for os.system() and understand why 'htmldata' is the wrong name for its return value. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Docs doesn't explain that i just take looked at
http://docs.python.org/2/library/os.html#os.system
I see that the return value of os.system its an indicator to as if the command
inside os.system() returned successfully.
So i guess ill be needing somethign like this:
htmltemp = '/home/nikos/www/data/private/htmltemp'
if htmlpage.endswith('.html'):
f = open( /home/nikos/www/ + htmlpage )
htmldata = f.read()
elif htmlpage.endswith('.py'):
os.system( 'python metrites.py %s' ) % htmltemp
f = open( htmltemp )
htmldata = f.read()
template = htmldata + counter
==
which i just tried and now iam receiving this:
type 'exceptions.TypeError': unsupported operand type(s) for %: 'int' and
'str'
I'am very close to the solution now i cna feel it but please help a bit!
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Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 1:34 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: os.system( 'python metrites.py %s' ) % htmltemp type 'exceptions.TypeError': unsupported operand type(s) for %: 'int' and 'str' Simple parenthesis problem. Take a careful look at the line mentioned in the exception traceback (which you didn't share with us, but fortunately the error's pretty obvious) and see if you can find the problem. Hint: htmltemp is the str mentioned in the error. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 4:37:31 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε:
On Fri, Mar 8, 2013 at 1:34 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote:
os.system( 'python metrites.py %s' ) % htmltemp
type 'exceptions.TypeError': unsupported operand type(s) for %: 'int' and
'str'
Simple parenthesis problem. Take a careful look at the line mentioned
in the exception traceback (which you didn't share with us, but
fortunately the error's pretty obvious) and see if you can find the
problem.
Hint: htmltemp is the str mentioned in the error.
/home/nikos/public_html/cgi-bin/metrites.py in ()
220 htmldata = f.read()
221 elif htmlpage.endswith('.py'):
222 os.system( 'python metrites.py %s' ) % htmltemp
223 f = open( htmltemp )
224 htmldata = f.read()
os = module 'os' from '/usr/lib64/python2.6/os.pyc', os.system = built-in
function system, htmltemp = '/home/nikos/www/data/private/htmltemp'
type 'exceptions.TypeError': unsupported operand type(s) for %: 'int' and
'str'
args = (unsupported operand type(s) for %: 'int' and 'str',)
message = unsupported operand type(s) for %: 'int' and 'str'
Τhis is the complete traceback iam reading it and reading it all over but i
just dont *see* what it tries to tell me.
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Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 1:44 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote:
/home/nikos/public_html/cgi-bin/metrites.py in ()
220 htmldata = f.read()
221 elif htmlpage.endswith('.py'):
222 os.system( 'python metrites.py %s' ) % htmltemp
223 f = open( htmltemp )
224 htmldata = f.read()
os = module 'os' from '/usr/lib64/python2.6/os.pyc', os.system = built-in
function system, htmltemp = '/home/nikos/www/data/private/htmltemp'
type 'exceptions.TypeError': unsupported operand type(s) for %: 'int' and
'str'
args = (unsupported operand type(s) for %: 'int' and 'str',)
message = unsupported operand type(s) for %: 'int' and 'str'
Τhis is the complete traceback iam reading it and reading it all over but i
just dont *see* what it tries to tell me.
Try to get the default output from an exception, it's a lot more
useful. In any case, line 222 is the one being highlighted; you get a
couple of lines of context, but the middle one is where the error is.
ChrisA
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Re: An error when i switched from python v2.6.6 = v3.2.3
os.system( 'python metrites.py htmltemp' ) f = open( htmltemp ) htmldata = f.read() gives: f undefined, builtin open = built-in function open, temp = '/home/nikos/www/data/private/htmltemp' type 'exceptions.IOError': [Errno 2] ��� ��� �� �� � �: '/home/nikos/www/data/private/htmltemp' args = (2, '\xc4\xe5\xed \xf5\xf0\xdc\xf1\xf7\xe5\xe9 \xf4\xdd\xf4\xef\xe9\xef \xe1\xf1\xf7\xe5\xdf\xef \xde \xea\xe1\xf4\xdc\xeb\xef\xe3\xef\xf2') errno = 2 filename = '/home/nikos/www/data/private/htmltemp' message = '' strerror = '\xc4\xe5\xed \xf5\xf0\xdc\xf1\xf7\xe5\xe9 \xf4\xdd\xf4\xef\xe9\xef \xe1\xf1\xf7\xe5\xdf\xef \xde \xea\xe1\xf4\xdc\xeb\xef\xe3\xef\xf2' Very weird! -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Why f gives back an error and doesnt open the filename that i give it as anvariable successfully? -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 4:50:34 μ.μ. UTC+2, ο χρήστης Νίκος Γκρ33κ έγραψε: os.system( 'python metrites.py htmltemp' ) That is wrong now i realize, it takes htmltemp as the filename where what i need is to take it htmltemp's varibales value. Switching back to: os.system( 'python metrites.py %s' ) % htmltemp f = open( htmltemp ) htmldata = f.read() but still donse see what iam doing wrong. -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 2:01 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: os.system( 'python metrites.py %s' ) % htmltemp Manually step through what this line should do. Follow the exact same rules Python will follow in evaluating this expression. http://docs.python.org/2/reference/expressions.html#operator-precedence http://docs.python.org/3/reference/expressions.html#operator-precedence As you'll see from footnote 8 or 5 (depending on which version of the docs), your percent operator is the same one listed in the table as a division operator. Now. Go through that expression, step by step. Walk through everything the Python interpreter does. Figure out exactly what happens first, second, third. Figure out when your percent operator gets handled. Then you'll know what's wrong with that line of code. You'll also gain a very useful understanding of Python, and more generally of the way most high level languages parse expressions. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Python source to C++ and/or Java
Hi, As a university project, I would like to work on an automated converter that transforms a Python source code to C++ or Java (not yet decided but I would vote on Java since it seems less complicated). Do you know if it's already done? What other similar projects are you aware of? And most importantly: where could I start this project? Could you give some ideas/tips? The converter doesn't have to recognize everything. First we want to build a simple prototype. Thanks, Laszlo -- http://mail.python.org/mailman/listinfo/python-list
Re: Python source to C++ and/or Java
Saw a talk at a Python usergroup today which talked about: Ply http://www.dabeaz.com/ply/ But you're probably looking for Cython. Python can run of the JRE e.g.: see Jython. There was also another one that you can use to build C extensions with, it was MP... something On Fri, Mar 8, 2013 at 2:19 AM, Jabba Laci jabba.l...@gmail.com wrote: Hi, As a university project, I would like to work on an automated converter that transforms a Python source code to C++ or Java (not yet decided but I would vote on Java since it seems less complicated). Do you know if it's already done? What other similar projects are you aware of? And most importantly: where could I start this project? Could you give some ideas/tips? The converter doesn't have to recognize everything. First we want to build a simple prototype. Thanks, Laszlo -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 5:13:24 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: On Fri, Mar 8, 2013 at 2:01 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: os.system( 'python metrites.py %s' ) % htmltemp Manually step through what this line should do. Follow the exact same rules Python will follow in evaluating this expression. http://docs.python.org/2/reference/expressions.html#operator-precedence http://docs.python.org/3/reference/expressions.html#operator-precedence As you'll see from footnote 8 or 5 (depending on which version of the docs), your percent operator is the same one listed in the table as a division operator. Now. Go through that expression, step by step. Walk through everything the Python interpreter does. Figure out exactly what happens first, second, third. Figure out when your percent operator gets handled. Then you'll know what's wrong with that line of code. You'll also gain a very useful understanding of Python, and more generally of the way most high level languages parse expressions. ChrisA I'am sorry to say i cant figure this out :( please enlight me. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python source to C++ and/or Java
Jabba Laci wrote: As a university project, I would like to work on an automated converter that transforms a Python source code to C++ or Java (not yet decided but I would vote on Java since it seems less complicated). Do you know if it's already done? What other similar projects are you aware of? https://pypi.python.org/pypi/Shed Skin/ An Optimizing (restricted) Python-to-C++ Compiler Shed Skin is an experimental (restricted) Python-to-C++ compiler. It accepts pure but implicitly statically typed Python (2.4-2.6) programs and generates optimized C++ code. [...] -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Fri, Mar 8, 2013 at 2:26 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Τη Πέμπτη, 7 Μαρτίου 2013 5:13:24 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: On Fri, Mar 8, 2013 at 2:01 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: os.system( 'python metrites.py %s' ) % htmltemp Manually step through what this line should do. Follow the exact same rules Python will follow in evaluating this expression. http://docs.python.org/2/reference/expressions.html#operator-precedence http://docs.python.org/3/reference/expressions.html#operator-precedence As you'll see from footnote 8 or 5 (depending on which version of the docs), your percent operator is the same one listed in the table as a division operator. Now. Go through that expression, step by step. Walk through everything the Python interpreter does. Figure out exactly what happens first, second, third. Figure out when your percent operator gets handled. Then you'll know what's wrong with that line of code. You'll also gain a very useful understanding of Python, and more generally of the way most high level languages parse expressions. ChrisA I'am sorry to say i cant figure this out :( please enlight me. You can figure it out, but it will take some effort. I will not enlighten you further. The documentation is all there; the answers are available. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
In c2a09443-3c74-477b-af9f-a6f3473eb...@googlegroups.com =?ISO-8859-7?B?zd/q7/Igw+rxMzPq?= nikos.gr...@gmail.com writes: Switching back to: os.system( 'python metrites.py %s' ) % htmltemp f =3D open( htmltemp ) htmldata =3D f.read()=09 but still donse see what iam doing wrong. You have the close-parentheses in the wrong place. The line should be: os.system( 'python metrites.py %s' % htmltemp ) -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 5:33:10 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: You can figure it out, but it will take some effort. I will not enlighten you further. The documentation is all there; the answers are available. I found it! I have placed 'htmltemp' within the os.system() call. Otherwise, os.system() returns a return value (int) which python then tries to concatenate with htmltemp (string). os.system( 'python metrites.py %s' % htmltemp ) :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
On Thu, Mar 7, 2013 at 4:22 AM, Wolfgang Maier wolfgang.ma...@biologie.uni-freiburg.de wrote: Well, it skips the costly len() call because your iter(Foo()) returns iter(range()) under the hood and list() uses that object's __len__() method. Iterators do not generally have __len__ methods. len(iter(range(10))) Traceback (most recent call last): File stdin, line 1, in module TypeError: object of type 'range_iterator' has no len() In most cases, such a workaround will not be feasible. Why should iter(QuerySet()) have a faster __len__() method defined than QuerySet() itself. iter(QuerySet()) should not have any __len__ method defined at all, which is why the optimization would be skipped. Most likely, iter(QuerySet()) just returns self anyway? But on this point, you are correct. The mongoengine QuerySet.__iter__ method is defined as: def __iter__(self): self.rewind() return self This is unfortunate design. Not only does it mean that the iterator's __len__ method cannot be trusted (what should the __len__ of a partially exhausted iterator return?), but it also means that requesting an iterator over the QuerySet will also silently invalidate any existing iterators. -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 5:55:58 μ.μ. UTC+2, ο χρήστης John Gordon έγραψε: In c2a09443-3c74-477b-af9f-a6f3473eb...@googlegroups.com =?ISO-8859-7?B?zd/q7/Igw+rxMzPq?= nikos.gr...@gmail.com writes: Switching back to: os.system( 'python metrites.py %s' ) % htmltemp f =3D open( htmltemp ) htmldata =3D f.read()=09 but still donse see what iam doing wrong. You have the close-parentheses in the wrong place. The line should be: os.system( 'python metrites.py %s' % htmltemp ) -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies Yes thank you, i found it myself and moment later i also saw your post! I'am very excites i discoverd it myself! Now instead of receiving proper html output i receive this: Go to http://superhost.gr please and click the 1st image you see on the top. Instead for the pelatologio.py html output to appear + counter string i see weird formatting, if you want please take a look. -- http://mail.python.org/mailman/listinfo/python-list
Re: listbox binding..what is the current selection?
On Mar 6, 2013, at 11:38 PM, Rex Macey xer0...@gmail.com wrote: Thanks. I have spent time with the docs, at least with the Python v3.3 and tkinter v8.5 (pdf). I wish they had more examples. My approach is to browse the docs, try a program, fail, read the docs, try again. When I can't figure it out, I post. I appreciate the help. With apologies for jumping into the middle of this discussion, but I've found the most helpful tkinter v8.5 docs to be the set at New Mexico tech: http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/index.html Seem quite complete and in particular, starting at section 28, they are quite detailed in their explanation of the ttk themed widgets. -Bill -- http://mail.python.org/mailman/listinfo/python-list
Re: Config ConfigParser
On 2013-03-06, Chris Angelico ros...@gmail.com wrote: On Wed, Mar 6, 2013 at 2:31 PM, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: What configuration settings does your podcast catcher software need? What makes you think it needs any? Don't over-engineer your application from the start. Begin with the simplest thing that works, and go from there. Agreed. The way I generally do these things is to simply gather the config entries into a block of literal assignments at the top of the program: host = ftp port = 21 proxy = 192.168.0.3:81 user = transfers password = secret I find it useful to stuff my config info in a class object; It is prettier than ALLCAPS, and also makes it simple to create and use new configurations without erasing or commenting out the old one. class Config: host = ftp port = 21 proxy = 192.168.0.3:81 user = transfers password = secret How much to engineer stuff is up to you. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Cloudicy.com - New Social Network
Hi. I am owner of www.cloudicy.com Cloudicy.com is a new cloud dictionary and website. Its a kind of Social Network. Users can create topics on website and post informations, suggestions, comments and critiques for posts. I need users (for manage posts and testing) and PHP developers. Please contact with me Tufan Çakıroğlu tufancakiro...@cloudicy.com www.cloudicy.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
Am 07.03.2013 17:00, schrieb Ian Kelly: On Thu, Mar 7, 2013 at 4:22 AM, Wolfgang Maier wolfgang.ma...@biologie.uni-freiburg.de wrote: Well, it skips the costly len() call because your iter(Foo()) returns iter(range()) under the hood and list() uses that object's __len__() method. Iterators do not generally have __len__ methods. len(iter(range(10))) Traceback (most recent call last): File stdin, line 1, in module TypeError: object of type 'range_iterator' has no len() But iterators have a length hint method that are used for some optimizations and preallocations, too. i = iter(range(10)) i.__length_hint__() 10 See http://www.python.org/dev/peps/pep-0424/ Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
I have fixed this! Still ahve allok and you will see that in both of my images they appear in the firstpage of superhost.gr the output of .py files appear fine except of that ehen a visitor click on my first 2 image links he also sees as first line this: print ( Content-type: text/html; charset=utf-8\n ) this is because the above code is a header and its contained to every cgi .py file that i generate html ouput from via os.system() Can this be somehow eliminated? -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is Ruby on Rails more popular than Django?
On Thursday, March 7, 2013 3:28:41 AM UTC-6, Rui Maciel wrote: rusi wrote: Anyone who's used emacs will know this as the bane of FLOSS software -- 100 ways of doing something and none perfect -- IOW too much spurious choice. This is a fallacy. Just because someone claims that there are 100 ways of doing something and none perfect, it doesn't mean that restricting choice leads to perfection. It doesn't. It only leads to getting stuck with a poor solution with no possibility of improving your life by switching to a better alternative. Not true. The one solution is only poor when the dev team of that one solution become resistant to change. But i don't think anybody would agree that a *single* solution could exist for ALL problems (at least not in the early stages of defining a problem domain'), although a *single* solution could exist for MOST problems. Worse, a complete lack of alternatives leads to a complete lack of competition, and therefore the absense of incentives to work on improvements. You know, progress. Wrong again. You don't need 10 versions of the same software to maintain evolution. Your premise is that competition between multiple versions of, what is basically the same exact software with TINY difference, creates evolution; WRONG!; competition cannot exist without IDEAS, and it is the presence of conflicting IDEAS that create evolution in software development, NOT fragmentation. Fragmenting the pool of great software developers into zeoltry sects is slowing evolution. What you do need is a bare minimum of projects that are perpetually open to outside ideas and constant evolution. You goal should be to work towards a single monolithic solution. But you must also keep in mind that the single solution must continue to evolve. Choice is good. Don't pretend it isn't. It's one of the reasons we have stuff like Python or Ruby nowadays, for example. Python and Ruby should both be superseded by a language that takes the best from both languages. Python and Ruby are so much alike in so many ways it's really silly. I think the main split point at this time is the PythonZen vs TIMTOWDI. Sure there are some glaring differences in Ruby vs Python methodology, but at the end of the day, An iterator is an iterator, a class is a class, a sequence is a sequence, a mapping is a mapping, a conditional is a conditional, a variable is a variable. Python has list comprehensions and Ruby has Array.[select|collect]. But let's investigate a much better example where multiplicity has fragmented a problem domain into OBLIVION, and that domain is Graphical User Interfaces! Python has tons of them available. How many different versions of a GUI window do we REALLY need. People, a StaticText is a StaticText, a Dialog is a Dialog, a ProgressBar is a ProgressBar, an EditText is an EditText, a Canvas is a Canvas, a NoteBook is a NoteBook, a ListControl is a ListControl; BLAH! If we are going to split into sects, then we should at least abstract away the parts that we agree on, and then collectively EXTEND our selfish versions from that single abstraction. Do you people realize how far we could have evolved a single GUI library by now if we were not wasting our time re-inventing the same old widgets again and again just because we cannot agree on minutiae! You would rather fragment the community and slow evolution than to make compromises and produce something greater than the combination of ALL the multiple projects out there? Fragmentation is foolish. We need to focus or energies wisely and work towards a common goal. This is the path of intelligent evolution, not a billion years of naive dice rolling. -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is Ruby on Rails more popular than Django?
On Fri, Mar 8, 2013 at 3:20 AM, Rick Johnson rantingrickjohn...@gmail.com wrote: If we are going to split into sects, then we should at least abstract away the parts that we agree on, and then collectively EXTEND our selfish versions from that single abstraction. We've already done that. We've agreed that a program is stored in zero or more files. Everything after that is an extension from that basic abstraction. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Cloudicy.com - New Social Network
On Fri, Mar 8, 2013 at 3:15 AM, Tufan Cakiroglu tufancakiro...@hotmail.com wrote: Hi. I am owner of www.cloudicy.com Cloudicy.com is a new cloud dictionary and website. Its a kind of Social Network. Users can create topics on website and post informations, suggestions, comments and critiques for posts. I need users (for manage posts and testing) and PHP developers. And this is applicable to Python... how? ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: listbox binding..what is the current selection?
On Thursday, March 7, 2013 9:13:16 AM UTC-6, William Ray Wing wrote: With apologies for jumping into the middle of this discussion, but I've found the most helpful tkinter v8.5 docs to be the set at New Mexico tech: Well these are free and open forums the last time i checked. Don't worry, nobody is going to get upset because you offered your opinions. I mean, the worst think that could happen is if someone offers up the exact same information that had already been offered early in the thread because they were too lazy to read the thread in full, and now they look like a complete boob ( a helpful boob, but a boob none-the-less). But that's just a crazy hypothetical situation. You would never do that. So no need to worry. -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
On Thu, Mar 7, 2013 at 9:20 AM, Christian Heimes christ...@python.org wrote: Am 07.03.2013 17:00, schrieb Ian Kelly: On Thu, Mar 7, 2013 at 4:22 AM, Wolfgang Maier wolfgang.ma...@biologie.uni-freiburg.de wrote: Well, it skips the costly len() call because your iter(Foo()) returns iter(range()) under the hood and list() uses that object's __len__() method. Iterators do not generally have __len__ methods. len(iter(range(10))) Traceback (most recent call last): File stdin, line 1, in module TypeError: object of type 'range_iterator' has no len() But iterators have a length hint method that are used for some optimizations and preallocations, too. i = iter(range(10)) i.__length_hint__() 10 See http://www.python.org/dev/peps/pep-0424/ Didn't know about that, thanks. Presumably a proper iter(QuerySet()) object could implement __length_hint__ in an efficient manner rather than by just calling the __len__ of the underlying QuerySet, -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Thu, Mar 7, 2013 at 11:22 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: I have fixed this! Still ahve allok and you will see that in both of my images they appear in the firstpage of superhost.gr the output of .py files appear fine except of that ehen a visitor click on my first 2 image links he also sees as first line this: print ( Content-type: text/html; charset=utf-8\n ) this is because the above code is a header and its contained to every cgi .py file that i generate html ouput from via os.system() Can this be somehow eliminated? -- That page is not valid html. View the source in your browser to see -- it has no html tag, no head, no body. fix that stuff http://mail.python.org/mailman/listinfo/python-list -- Joel Goldstick http://joelgoldstick.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is Ruby on Rails more popular than Django?
On Mar 7, 2:52 pm, Sven sven...@gmail.com wrote: This thread reminds me of an article I read recently: http://rubiken.com/blog/2013/02/11/web-dev-a-crazy-world.html Ha Ha! Thanks for that. Of course its exaggerated. But then hyperbole can tell a story that logic cannot. -- http://mail.python.org/mailman/listinfo/python-list
Re: Unhelpful traceback
On 3/7/2013 5:10 AM, Dave Angel wrote:
On 03/07/2013 01:33 AM, John Nagle wrote:
Here's a traceback that's not helping:
A bit more context would be helpful. Starting with Python version.
Sorry, Python 2.7.
If that isn't enough, then please give the whole context, such as where
zipelt and filename came from. And don't forget to specify Python
version. Version 3.x treats nonbinary files very differently than 2.x
Here it is, with some email wrap problems.
John Nagle
def dofilecsv(self, infilename, infdraw) :
Loader for Companies House company data, with files already open.
self.logger.info('Converting %s' % (infilename, ))# log
(pathpart, filepart) = os.path.split(infilename)#
split off file part to construct outputfile)
(outfile, ext) = os.path.splitext(filepart) #
remove extension
outfile += .sql #
add SQL suffix
outfilename = os.path.abspath(os.path.join(self.options.destdir,
outfile))
# ***NEED TO INSURE UNIQUE OUTFILENAME EVEN IF DUPLICATED IN
ZIP FILES***
decoder = codecs.getreader('utf-8') #
UTF-8 reader
with decoder(infdraw,errors=replace) as infd :
with codecs.open(outfilename, encoding='utf-8', mode='w') as
outfd :
headerline = infd.readline()#
read header line
self.doheaderline(headerline) #
process header line
reader = csv.reader(infd, delimiter=',', quotechar='')
# CSV file
for fields in reader : #
read entire CSV file
self.doline(outfd, fields) #
copy fields
self.logstats(infilename) #
log statistics of this file
def dofilezip(self, infilename) :
Do a ZIP file containing CSV files.
try :
inzip = zipfile.ZipFile(infilename, r, allowZip64=True)
# try to open
zipdir = inzip.infolist() # get
objects in file
for zipelt in zipdir : # for all
objects in file
self.logger.debug('ZIP file %s contains %s.' %
(infilename, zipelt.filename))
(infile, ext) = os.path.splitext(zipelt.filename) #
remove extension
if ext.lower() == .csv : # if a CSV file
with inzip.open(zipelt.filename,r) as infd :
# do this file
self.dofilecsv(infile, infd)# as a CSV file
else :
self.logger.error('Non-CSV file in ZIP file: %s' %
(zipelt.filename,))
self.errorcount += 1# tally
except zipfile.BadZipfile as message : # if trouble
self.logger.error('Bad ZIP file: %s' % (infilename,)) #
note trouble
self.errorcount += 1# tally
def dofile(self, infilename) :
Loader for Companies House company data
(sink, ext) = os.path.splitext(infilename) # get extension
if ext == .zip : # if .ZIP file
self.dofilezip(infilename) # do ZIP file
elif ext == .csv :
self.logger.info('Converting %s' % (infilename,))# log
with open(infilename, rb) as infd :
self.dofilecsv(infilename, infd)# do
self.logstats(infilename) # log statistics
of this file
else :
self.logger.error('File of unexpected type (not .csv or
.zip): %s ' % (infilename,))
self.errorcount += 1
--
http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Thu, Mar 7, 2013 at 12:41 PM, Joel Goldstick joel.goldst...@gmail.comwrote: On Thu, Mar 7, 2013 at 11:22 AM, Νίκος Γκρ33κ nikos.gr...@gmail.comwrote: I have fixed this! Still ahve allok and you will see that in both of my images they appear in the firstpage of superhost.gr the output of .py files appear fine except of that ehen a visitor click on my first 2 image links he also sees as first line this: print ( Content-type: text/html; charset=utf-8\n ) this is because the above code is a header and its contained to every cgi .py file that i generate html ouput from via os.system() Can this be somehow eliminated? This may have to do with the configuration of your server. There may be differences in how to do that for python 2.x and python 3.x. I can't help you more than that -- That page is not valid html. View the source in your browser to see -- it has no html tag, no head, no body. fix that stuff http://mail.python.org/mailman/listinfo/python-list -- Joel Goldstick http://joelgoldstick.com -- Joel Goldstick http://joelgoldstick.com -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Thu, Mar 7, 2013 at 1:51 PM, rh richard_hubb...@lavabit.com wrote:
On Thu, 7 Mar 2013 07:57:33 -0800 (PST)
Νίκος Γκρ33κ nikos.gr...@gmail.com wrote:
I found it! I have placed 'htmltemp' within the os.system() call.
Otherwise, os.system() returns a return value (int) which python then
tries to concatenate with htmltemp (string).
os.system( 'python metrites.py %s' % htmltemp )
Can also do
sterrs = 'errorsout'
os.system( 'python metrites.py {0} 2 {1}'.format(htmltemp,sterrs))
It's more 3ish, or 3ist or 3like.
:-)
--
http://mail.python.org/mailman/listinfo/python-list
The content type situation is discussed here
http://stackoverflow.com/questions/9145517/executing-a-python-script-in-apache2
--
Joel Goldstick
http://joelgoldstick.com
--
http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
Ian Kelly, 07.03.2013 18:31: On Thu, Mar 7, 2013 at 9:20 AM, Christian Heimes wrote: Am 07.03.2013 17:00, schrieb Ian Kelly: On Thu, Mar 7, 2013 at 4:22 AM, Wolfgang Maier wrote: Well, it skips the costly len() call because your iter(Foo()) returns iter(range()) under the hood and list() uses that object's __len__() method. Iterators do not generally have __len__ methods. len(iter(range(10))) Traceback (most recent call last): File stdin, line 1, in module TypeError: object of type 'range_iterator' has no len() But iterators have a length hint method that are used for some optimizations and preallocations, too. i = iter(range(10)) i.__length_hint__() 10 See http://www.python.org/dev/peps/pep-0424/ Didn't know about that, thanks. Presumably a proper iter(QuerySet()) object could implement __length_hint__ in an efficient manner rather than by just calling the __len__ of the underlying QuerySet, And how exactly would it do that, without either doing what __len__ does or reading the whole result set into memory? Stefan -- http://mail.python.org/mailman/listinfo/python-list
April 5 conference on Python in Finance (NYC)
As Python programmers, you may be interested in participating in an upcoming Python in Finance conference, an all-day event taking place in New York on the 5th of April (www.python-in-finance.com). The event brings together 300+ Python practitioners with a who's who line up of speakers from the world of Python and finance: Travis Oliphant (Numpy), Wes McKinney (Pandas), Andreas Kloeckner (PyCUDA and PyOpenCL), Peter Wang (Chaco) ... the list goes on. And I am very excited to announce that Claudia Perlich, Chief Scientist at m6d, will be giving the keynote address to kick off the event; Claudia's list of achievements include being a three-time winner of the KDD cup, and numerous and notable contributions in the Machine Learning, Data Mining and Predictive Modeling worlds. It's going to be an informative, exciting and fun day of great speakers mixed with practitioners of Python in Finance. We have managed to get some great sponsors for the event to keep the attendance fee at a rock bottom rate of less than three hundred dollars; not bad for an all-day event in New York city with lunch thrown in! I have a special offer just for you; use the code QUANT at www.python-in-finance.com and save 25% off. The event is filling up fast so if you plan on coming, register soon; and be sure to let your friends and colleagues know about the event. Shiuan Butler www.python-in-finance.com -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Thu, Mar 7, 2013 at 1:57 PM, Joel Goldstick joel.goldst...@gmail.comwrote:
On Thu, Mar 7, 2013 at 1:51 PM, rh richard_hubb...@lavabit.com wrote:
On Thu, 7 Mar 2013 07:57:33 -0800 (PST)
Νίκος Γκρ33κ nikos.gr...@gmail.com wrote:
I found it! I have placed 'htmltemp' within the os.system() call.
Otherwise, os.system() returns a return value (int) which python then
tries to concatenate with htmltemp (string).
os.system( 'python metrites.py %s' % htmltemp )
Can also do
sterrs = 'errorsout'
os.system( 'python metrites.py {0} 2 {1}'.format(htmltemp,sterrs))
It's more 3ish, or 3ist or 3like.
:-)
--
http://mail.python.org/mailman/listinfo/python-list
The content type situation is discussed here
http://stackoverflow.com/questions/9145517/executing-a-python-script-in-apache2
--
Joel Goldstick
http://joelgoldstick.com
So, I see you fixed the problem. How?
--
Joel Goldstick
http://joelgoldstick.com
--
http://mail.python.org/mailman/listinfo/python-list
Re: Insert comma in number?
Peter Otten wrote: Last not least there's the option to employ locale-aware formatting: Not quite last ... there's the mind-bending regular expression route: import re re.sub(r(?=\d)(?=(\d\d\d)+$), ,, 12345678) # 12,345,678 re.sub(r(?=\d)(?=(\d\d\d)+$), ,, -54321) # -54,321 -John -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
Τη Πέμπτη, 7 Μαρτίου 2013 9:36:33 μ.μ. UTC+2, ο χρήστης Joel Goldstick έγραψε: So, I see you fixed the problem. How? Apart from appearing ugly its not causing any more trouble(other than some issues that i have fixed), so i will just d: os.system( 'python %s %s' % (htmlpage, temp) ) f = open( temp ) htmldata = f.read() htmldata = htmldata.replace( 'Content-type: text/html; charset=utf-8', '' ) -- http://mail.python.org/mailman/listinfo/python-list
Re: An error when i switched from python v2.6.6 = v3.2.3
On Thu, Mar 7, 2013 at 1:04 PM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Τη Πέμπτη, 7 Μαρτίου 2013 9:36:33 μ.μ. UTC+2, ο χρήστης Joel Goldstick έγραψε: So, I see you fixed the problem. How? Apart from appearing ugly its not causing any more trouble(other than some issues that i have fixed), so i will just d: os.system( 'python %s %s' % (htmlpage, temp) ) f = open( temp ) htmldata = f.read() htmldata = htmldata.replace( 'Content-type: text/html; charset=utf-8', '' ) If htmlpage is being pulled from the HTTP request as I think it is, then you have a code injection vulnerability here. Think what could happen if htmlpage were something like this: -c ''; rm -rf /; oops.py -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
On Thu, Mar 7, 2013 at 12:19 PM, Stefan Behnel stefan...@behnel.de wrote: Didn't know about that, thanks. Presumably a proper iter(QuerySet()) object could implement __length_hint__ in an efficient manner rather than by just calling the __len__ of the underlying QuerySet, And how exactly would it do that, without either doing what __len__ does or reading the whole result set into memory? If the underlying cursor provides its own efficient length hint, it could return that. Or if the query is result-limited, use the limit as a length hint, provided it's not absurdly large. And if you really can't efficiently determine anything about the length of the result set at all, you can always fall back on returning NotImplemented. -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
On 3/7/2013 11:00 AM, Ian Kelly wrote: But on this point, you are correct. The mongoengine QuerySet.__iter__ method is defined as: def __iter__(self): self.rewind() return self This is unfortunate design. Not only does it mean that the iterator's __len__ method cannot be trusted (what should the __len__ of a partially exhausted iterator return?), but it also means that requesting an iterator over the QuerySet will also silently invalidate any existing iterators. I view that design as a violation of the iterator protocol and hence a program bug. __iter__ should either *just* return self (if the self is an iterator) or return a new object (if self is a non-iterator iterable). File objects are iterators and .__iter__ does not rewind. f = open(f:/python/mypy/tem.py) next(f) 'class myit(list):\n' f2 = iter(f) f2 is f True next(f2) def __bytes__(self): return b'hello'\n -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Need help deriving a convertion function on python
Good day, I have a computer programming assignment. I am completely lost and i need some help. These are the questions that are confusing me (a) Write a function which converts from gallons to cups2 (b) Now we’d like to be able to convert from cups to milliliters, since metric measurements are easier to convert between. Implement a function which does this. (c) We’d also like to be able to easily convert gallons into milliliters, so implement a function which does this -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
On 3/7/2013 11:20 AM, Christian Heimes wrote: But iterators have a length hint method that are used for some optimizations and preallocations, too. This is easy when the base iterable has a length method, as do range objects. i = iter(range(10)) i.__length_hint__() 10 And the length_hint can (should be) decremented with each next call. next(i); next(i) 0 1 i.__length_hint__() 8 -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Need help deriving a convertion function on python
On Fri, Mar 8, 2013 at 7:25 AM, johnnyu...@gmail.com wrote: Good day, I have a computer programming assignment. I am completely lost and i need some help. These are the questions that are confusing me (a) Write a function which converts from gallons to cups2 (b) Now we’d like to be able to convert from cups to milliliters, since metric measurements are easier to convert between. Implement a function which does this. (c) We’d also like to be able to easily convert gallons into milliliters, so implement a function which does this Here's a good place to start: http://docs.python.org/3/tutorial/ After that, think about your task as three sub-tasks: 1) Get and parse input - what does your human need to tell your program? 2) Processing - the actual conversion, the meaty mathematical stuff 3) Produce output - what does your program report to your human? Then start work on any one of the three. If you get stuck, move on to one of the others. Once you've put some code together, test it, play with it, and refine it. And if you get stuck, THEN come and ask for help; but first, try to solve the problem yourself. The purpose of this assignment is to help you learn to write code, so we're not going to simply give you the code :) By the way, you may find the python-tutor list more suitable, if you feel your questions are particularly basic: http://mail.python.org/mailman/listinfo/tutor The Python tutorial really is a very good place to start. I'm seriously considering giving it to a ten-year-old girl, granting her just IDLE and a web browser, and seeing what she can accomplish in a day. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Interesting list() un-optimization
Iterators do not generally have __len__ methods.
len(iter(range(10)))
Traceback (most recent call last):
File stdin, line 1, in module
TypeError: object of type 'range_iterator' has no len()
But iterators have a length hint method that are used for some
optimizations and preallocations, too.
i = iter(range(10))
i.__length_hint__()
10
See http://www.python.org/dev/peps/pep-0424/
very interesting (hadn't heard of it)! Just checked the PEP,
then tested list()'s behavior, and it is just as described:
class stupid(list):
def __len__(self):
print ('len() called')
return NotImplemented
def __length_hint__(self):
print ('hint requested')
l=iter(self).__length_hint__()
print (l)
return l
a=stupid((1,2,3))
len(d)
==
len() called
Traceback (most recent call last):
File pyshell#79, line 1, in module
len(d)
TypeError: an integer is required
list(d)
==
len() called
hint requested
3
[1, 2, 3]
so list() first tries to call the iterable's __len__ method. If that raises a
TypeError it falls back to __length_hint__ .
What I still don't know is how the listiterator object's __length_hint__ works.
Why, in this case, does it know that it has a length of 3 ? The PEP does not
provide any hint how a reasonable hint could be calculated.
And how exactly would it do that, without either doing what __len__ does or
reading the whole result set into memory?
Stefan
a very good question.
Best,
Wolfgang
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Python and Hidden Markov Model
Dear Group, I was trying to learn Hidden Markov Model. In Python there are various packages, but I was willing to do some basic calculation starting from the scratch so that I can learn the model very aptly. Do you know of any thing such? Thanking you in Advance, Regards, Subhabrata. -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is Ruby on Rails more popular than Django?
In article 3d9fe0b2-7931-4ab6-8929-235460729...@q9g2000pbf.googlegroups.com, rusi rustompm...@gmail.com wrote: On Mar 6, 11:03 pm, Jason Hsu jhsu802...@gmail.com wrote: I'm currently in the process of learning Ruby on Rails. I'm going through the Rails for Zombies tutorial, and I'm seeing the power of Rails. I still need to get a Ruby on Rails site up and running for the world to see. (My first serious RoR site will profile mutual funds from a value investor's point of view.) I have an existing web site and project called Doppler Value Investing (dopplervalueinvesting.com) that uses Drupal to display the web pages and Python web-scraping scripts to create *.csv and *.html files showing information on individual stocks. My site has a tacked-on feel to it, and I definitely want to change the setup. At a future time, I will rebuild my Doppler Value Investing web site in either Ruby on Rails or Django. The Ruby on Rails route will require rewriting my Python script in Ruby. The Django route will require learning Django. (I'm not sure which one will be easier.) My questions: 1. Why is Ruby on Rails much more popular than Django? Where there is choice there is no freedom http://www.jiddu-krishnamurti.net/en/1954/1954-03-03-jiddu-krishnamurti-8th-pu blic-talk Python-for-web offered so much choice -- zope, django, turbogears, cherrypy, web.py etc etc -- that the newbie was completely drowned. With Ruby there is only one choice to make -- choose Ruby and rails follows. Anyone who's used emacs will know this as the bane of FLOSS software -- 100 ways of doing something and none perfect -- IOW too much spurious choice. GvR understood and rigorously implemented a dictum that Nicklaus Wirth formulated decades ago -- The most important thing about language design is what to leave out. Therefore Python is a beautiful language. Unfortunately the same leadership did not carry over to web frameworks and so we have a mess. I guess the situation is being corrected with google putting its artillery behind django. I strongly agree. The fact that there is no de-facto standard web system for Python is a major problem. Consider: - With too many choice one has no idea which projects will be maintained and which will be abandoned. - Expert knowledge among users is spread more thinly. - The effort of contributors is diluted. Years ago when I had some simple web programming to do I looked at the choices, gave up and used PHP (which I hated, but got the job done). If RoR had been available I would have been much happier using that. In my opinion the plethora of Python web frameworks is a serious detriment to trust and wider acceptance of Python for this use. If Django is becoming this standard, that is excellent news. Some choice is good, but in my opinion too much choice and lack of a de-facto standard are very detrimental. -- Russell -- http://mail.python.org/mailman/listinfo/python-list
Re: Unhelpful traceback
On 3/7/2013 5:10 AM, Dave Angel wrote: On 03/07/2013 01:33 AM, John Nagle wrote: infdraw is a stream from the zip module, create like this: with inzip.open(zipelt.filename,r) as infd : You probably need a 'rb' rather than 'r', since the file is not ASCII. self.dofilecsv(infile, infd) This works for data records that are pure ASCII, but as soon as some non-ASCII character comes through, it fails. No, the ZIP module gives you back the bytes you put in. rb is not accepted there: File InfoCompaniesHouse.py, line 197, in dofilezip with inzip.open(zipelt.filename,rb) as infd :# do this file File C:\python27\lib\zipfile.py, line 872, in open raise RuntimeError, 'open() requires mode r, U, or rU' RuntimeError: open() requires mode r, U, or rU b for files is about end of line handling (CR LF - LF), anyway. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Unhelpful traceback
On 3/7/2013 10:42 AM, John Nagle wrote:
On 3/7/2013 5:10 AM, Dave Angel wrote:
On 03/07/2013 01:33 AM, John Nagle wrote:
Here's a traceback that's not helping:
A bit more context would be helpful. Starting with Python version.
Sorry, Python 2.7.
The trouble comes from here:
decoder = codecs.getreader('utf-8') # UTF-8 reader
with decoder(infdraw,errors=replace) as infd :
It's not the CSV module that's blowing up. If I just feed the
raw unconverted bytes from the ZIP module into the CSV module,
the CSV module runs without complaint.
I've tried 'utf-8', 'ascii', and 'windows-1252' as codecs.
They all blow up. 'errors=replace' doesn't help.
John Nagle
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Re: Need help deriving a convertion function on python
On Thursday, March 7, 2013 2:25:42 PM UTC-6, johnn...@gmail.com wrote: I have a computer programming assignment. I am completely lost and i need some help. These are the questions that are confusing me (a) Write a function which converts from gallons to cups2 How can we help you if we have no idea of what level of programming experience you have attained. Can you write functions? Can you declare variables? What about mathematics? If you can already do all these things then make an attempt to accomplish problem (a) and then ask us a specific question when you run into trouble. (b) Now we’d like to be able to convert from cups to milliliters, since metric measurements are easier to convert between. Implement a function which does this. (c) We’d also like to be able to easily convert gallons into milliliters, so implement a function which does this In due time grasshopper. First make an attempt to solve problem (a). Chris gave some great advice however i would like to insert a step 0 into his advice list (this is python after all ;-). * STEP 0: Learn how to convert from gallons to cups using a pencil and paper only. * STEP 1: Read docs and learn about functions (if applicable). * STEP 2: Try to write a python function that will take one parameter (representing the number of gallons) and then perform the mathematical equations required to deduce the number of cups in a gallon, THEN return the result. -- http://mail.python.org/mailman/listinfo/python-list
Re: Unhelpful traceback
On Thu, Mar 7, 2013 at 3:13 PM, John Nagle na...@animats.com wrote:
On 3/7/2013 10:42 AM, John Nagle wrote:
On 3/7/2013 5:10 AM, Dave Angel wrote:
On 03/07/2013 01:33 AM, John Nagle wrote:
Here's a traceback that's not helping:
A bit more context would be helpful. Starting with Python version.
Sorry, Python 2.7.
The trouble comes from here:
decoder = codecs.getreader('utf-8') # UTF-8 reader
with decoder(infdraw,errors=replace) as infd :
It's not the CSV module that's blowing up. If I just feed the
raw unconverted bytes from the ZIP module into the CSV module,
the CSV module runs without complaint.
I've tried 'utf-8', 'ascii', and 'windows-1252' as codecs.
They all blow up. 'errors=replace' doesn't help.
I believe that the csv module is expecting string data, not unicode.
Since it receives unicode as a result of your decoder step, it tries
to convert it to a string using str(), which implicitly tries to
encode the data using the ascii codec, hence the error that you're
seeing.
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Re: Interesting list() un-optimization
On 3/7/2013 3:41 PM, Wolfgang Maier wrote:
Iterators do not generally have __len__ methods.
len(iter(range(10)))
Traceback (most recent call last):
File stdin, line 1, in module
TypeError: object of type 'range_iterator' has no len()
But iterators have a length hint method that are used for some
optimizations and preallocations, too.
i = iter(range(10))
i.__length_hint__()
10
See http://www.python.org/dev/peps/pep-0424/
very interesting (hadn't heard of it)! Just checked the PEP,
then tested list()'s behavior, and it is just as described:
class stupid(list):
def __len__(self):
print ('len() called')
return NotImplemented
def __length_hint__(self):
print ('hint requested')
l=iter(self).__length_hint__()
print (l)
return l
a=stupid((1,2,3))
len(d)
==
len() called
Traceback (most recent call last):
File pyshell#79, line 1, in module
len(d)
TypeError: an integer is required
list(d)
==
len() called
hint requested
3
[1, 2, 3]
so list() first tries to call the iterable's __len__ method. If that raises a
TypeError it falls back to __length_hint__ .
What I still don't know is how the listiterator object's __length_hint__ works.
Why, in this case, does it know that it has a length of 3 ? The PEP does not
provide any hint how a reasonable hint could be calculated.
'How' depends on the iterator, but when it has an underlying concrete
iterable of known length, it should be rather trivial as .__next__ will
explicitly or implicitly use the count remaining in its operation. Part
of the justification of adding __length_hint__ is that in many cases it
is so easy. Iterators based on an iterator with a length_hint can just
pass it along.
The list iterator might work with a C pointer to the next item and a
countdown count initialized to the list length. The __next__ method
might be something like this mixed C and Python pseudocode:
if (countdown--) return *(current--);
else raise StopIteration
(For non-C coders, postfix -- decrements value *after* retrieving it.)
Then __length_hint__ would just return countdown. Tuples would work the
same way. Sets and dicts would need current-- elaborated to skip over
empty hash table slots. Range iterators would add the step to current,
instead of 1.
--
Terry Jan Reedy
--
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Re: iterating over a list as if it were a circular list
Am 07.03.2013 10:27, schrieb Sven: Now I would like to iterate over P and place one N at each point. However if you run out of N I'd like to restart from N[0] and carry on until all the points have been populated. So far I've got (pseudo code) i = 0 for point in points: put N[i] at point if i len(N): i = 0 is this the most pythonic way to accomplish this? Sounds like http://docs.python.org/3/library/itertools.html#itertools.repeat to me. Additionally, what if I wanted to pull a random element from N, but I want to ensure all elements from N have been used before starting to pick already chosen random elements again. So far I thought of duplicating the list and removing the randomly chosen elements from the list, and when it's empty, re-copying it. But that seems a little wrong if you know what I mean. This can be done with http://docs.python.org/3/library/random.html#random.shuffle untested: import random def repeated_random_permutation(iterable): pool = list(iterable) while True: random.shuffle(pool) yield from pool Greetings -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over a list as if it were a circular list
Am 08.03.2013 00:49, schrieb Alexander Blinne: http://docs.python.org/3/library/itertools.html#itertools.repeat obviously I was aiming for http://docs.python.org/2/library/itertools.html#itertools.cycle here Greetings -- http://mail.python.org/mailman/listinfo/python-list
Re: Need help deriving a convertion function on python
On 03/07/2013 03:40 PM, Chris Angelico wrote: On Fri, Mar 8, 2013 at 7:25 AM, johnnyu...@gmail.com wrote: Good day, I have a computer programming assignment. I am completely lost and i need some help. These are the questions that are confusing me SNIP By the way, you may find the python-tutor list more suitable, if you feel your questions are particularly basic: http://mail.python.org/mailman/listinfo/tutor Actually his brother 'akuma upko' (sharing the same account) posted the same question on Python-tutor 2 minutes before johnny posted it here. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python and Hidden Markov Model
On 03/07/2013 03:48 PM, subhabangal...@gmail.com wrote: Dear Group, I was trying to learn Hidden Markov Model. In Python there are various packages, but I was willing to do some basic calculation starting from the scratch so that I can learn the model very aptly. Do you know of any thing such? I'm sorry, but I'm having trouble figuring out what you're asking for. You said there are packages that could help, but that you want to learn more by doing it from scratch. So what then are you asking for, if not packages, sample code or something that's not from scratch ? -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Unhelpful traceback
On 03/07/2013 04:23 PM, John Nagle wrote: snip raise RuntimeError, 'open() requires mode r, U, or rU' RuntimeError: open() requires mode r, U, or rU b for files is about end of line handling (CR LF - LF), anyway. Only for Python 2. Since originally you didn't specify, I took my best shot. If you omit the 'b' opening a binary file in Python 3, you'd get problems similar to yours. Text files will be converted to Unicode. That's one of the reasons that specifying the full environment is important. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
