Re: Strange problem when running python code
Dennis Lee Bieber wrote: > As an occassional dabbler in the Tarot, I can assure you that cards > are NOT used for "mind-reading"; they merely offer up a possible future > which must be interpreted in light of the querant's situation... (or, > since I typically read for myself -- the allow my subconscious to reveal > my inclinations based upon the cards' meanings) Who said anything about tarot? I'm talking about the old "Pick a card, any card..." bit. Cheers. -- Steve Juranich Tucson, AZ USA -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
On Tue, 04 Apr 2006 12:01:12 -0700, ishtar2020 wrote: > I must add, when the python interpreter displays the traceback, with > the line that is producing the error, it doesn't look like the one I > got in the code. I sometimes get that problem when I'm running code, I make a change in the source file, use reload() to update my module, but forget to reinitialise my objects still in memory. So I end up with (buggy) instances in memory, but when I hit a traceback, the source code displayed has nothing to do with the actual error because the source file has been edited. If you are getting these weird errors when you do nothing but change comments, there is a good chance that's what is happening. Here is an example of that behaviour. Is this the sort of thing which is happening to you? # === File tester.py === class Parrot(object): def speak(self): print "I'm pining for the fjords." def species(self, colour=None): return "Norwegian " + colour Now import the file: >>> import tester >>> p = tester.Parrot() >>> p.speak() I'm pining for the fjords. >>> p.species() Traceback (most recent call last): File "", line 1, in ? File "tester.py", line 9, in species return "Norwegian " + colour TypeError: cannot concatenate 'str' and 'NoneType' objects Now I edit the file, just adding comments and nothing else: # === File tester.py === class Parrot(object): # Add some comments here. # Line two. def speak(self): print "I'm pining for the fjords." def species(self, colour=None): return "Norwegian " + colour But if I execute the old existing object, I get a nonsensical error: >>> p.species() Traceback (most recent call last): File "", line 1, in ? File "tester.py", line 9, in species print "I'm pining for the fjords." TypeError: cannot concatenate 'str' and 'NoneType' objects Even doing a reload() doesn't help. I have to delete the old instance, and create a new one. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
"ishtar2020" wrote: > It's quite puzzling. And if I change some lousy thing, like inserting a > newline between the sentences, the interpreter will find another error > somewhere else, even when that part of the code was working flaw- > lessly in previous runs what Python version are you using ? (I've already provided an explanation in another post, but it seems that neither you nor the "it's your fault" crowd read that...). -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
Are U Using any IDE for Python? If yes then check out the setting and make sure that u are running same code. -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
On 04/04/2006-12:01PM, ishtar2020 wrote: > This is the line where the interpreter finds the error > >if text.list[i].toString() in limits:list)): <- Here is where That line has two extra close parens before the : Can you show the traceback? -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
ishtar2020 wrote:
> Hi everybody
>
> I've been writing my very first application in Python and everything is
> running smoothly, except for a strange problem that pops up every once
> in a while. I'm sure is the kind
> of newbie thing every seasoned programmer knows.
>
> Sometimes a receive strange Syntax Errors from parts of code that
> worked perfectly minutes ago. What's even more puzzling is that those
> errors are pointed to another part of the module when I do some random,
> innofensive changes in the code (like inserting a line or deleting some
> comments). Sometimes those changes are enough to make the error
> dissapear.
>
> Could it be that python has found a real error but is failing to tell
> me where it is?
>
I don't mean to accuse you or to start a tab v. non-tab war (is tab v.
non-tab a holy war?, it should be because tabs are so damn useful for
formatting and getting everything just-right), but don't use tabs if you
are using them. Here are the reasons: 1. they personally annoy me. 2.
you can't see the damn things (hence the basis for why they are so
annoying). "Tab" comes from the root for the Greek for "table" (or is it
the other way around?, or is it Latin? or Arabic? or Hebrew?). Thus,
tabs should be reserved for thier god-given intended purpose, which is
tab-delimited tables, where a parser can easily separate by them.
Internal, and hence annoying, tabs should not be used elsewhere because
it screws everything up. For example, here is a tab-delimited parser
written in python
table = []
for line in tab_delimited_table:
table.append(line.split('\t'))
Man that was easy! Now, when people put annoying tabs everywhere, to get
their indent just-so, then it totally screws everything up, including
this parser, which was designed for tables delimited by tabs--because
that is the tab's special purpose.
There is one exception however. Its called the tab-space-tab approach.
If you are using tabs to indent your code, then always put at least one
space between tabs. Never put two tabs together. This helps the editor
to display your code correctly.
James
--
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095
http://www.jamesstroud.com/
--
http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
Roy Smith wrote: > ishtar2020 <[EMAIL PROTECTED]> wrote: >>I've been writing my very first application in Python and everything is >>running smoothly, except for a strange problem that pops up every once >>in a while. I'm sure is the kind >>of newbie thing every seasoned programmer knows. > > Nobody here has a crystal ball. Please post your code, tell us what > changes you made, and cut-and-paste the entire error message and the > associated stack trace. Speak for yourself, Mr. I-Have-No-Crystal-Ball. Besides, any lummox knows that crystal balls are for seeing the future, not for mind-reading. No, to do proper mind reading you need youself a pointy hat and (preferably) a deck of cards. Sorry, weird day at work. Had to vent. -- Steve Juranich Tucson, AZ USA -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
I must add, when the python interpreter displays the traceback, with the line that is producing the error, it doesn't look like the one I got in the code. This is the line where the interpreter finds the error if text.list[i].toString() in limits:list)): <- Here is where the error is found, but this line is not on my file SyntaxError: invalid syntax And this is the line I got on the file, looks like the interpreter is mixing the second sentence with the end of the first one: for i in range(self.initialPositionl+1,len(text.list)): if text.list[i].toString() in limits: self.finalPosition=i break It's quite puzzling. And if I change some lousy thing, like inserting a newline between the sentences, the interpreter will find another error somewhere else, even when that part of the code was working flawlessly in previous runs -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
ishtar2020 <[EMAIL PROTECTED]> wrote: >I've been writing my very first application in Python and everything is >running smoothly, except for a strange problem that pops up every once >in a while. I'm sure is the kind >of newbie thing every seasoned programmer knows. Nobody here has a crystal ball. Please post your code, tell us what changes you made, and cut-and-paste the entire error message and the associated stack trace. -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
"ishtar2020" wrote: > Sometimes a receive strange Syntax Errors from parts of code that > worked perfectly minutes ago. What's even more puzzling is that those > errors are pointed to another part of the module when I do some random, > innofensive changes in the code (like inserting a line or deleting some > comments). Sometimes those changes are enough to make the error > dissapear. Python 2.4.1 has a bug where this can happen if you're 1) using coding directives, and 2) your module is relatively large. I suggest upgrading to 2.4.3. -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
ishtar2020 wrote: > Hi everybody > > I've been writing my very first application in Python and everything is > running smoothly, except for a strange problem that pops up every once > in a while. I'm sure is the kind > of newbie thing every seasoned programmer knows. > > Sometimes a receive strange Syntax Errors from parts of code that > worked perfectly minutes ago. What's even more puzzling is that those > errors are pointed to another part of the module when I do some random, > innofensive changes in the code (like inserting a line or deleting some > comments). Sometimes those changes are enough to make the error > dissapear. > > Could it be that python has found a real error but is failing to tell > me where it is? > I recently had quite a hassle with an indentation problem, so you might want to check on your whitespace. -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem when running python code
For certain errors like Syntax Errors, you'll get a much more helpful response if you post some actual code. Strip it down if you have to, but make sure we can reproduce the errors. -- Brian Beck Adventurer of the First Order -- http://mail.python.org/mailman/listinfo/python-list
Strange problem when running python code
Hi everybody I've been writing my very first application in Python and everything is running smoothly, except for a strange problem that pops up every once in a while. I'm sure is the kind of newbie thing every seasoned programmer knows. Sometimes a receive strange Syntax Errors from parts of code that worked perfectly minutes ago. What's even more puzzling is that those errors are pointed to another part of the module when I do some random, innofensive changes in the code (like inserting a line or deleting some comments). Sometimes those changes are enough to make the error dissapear. Could it be that python has found a real error but is failing to tell me where it is? -- http://mail.python.org/mailman/listinfo/python-list
