Re: [Tutor] Looking for ConfigObj Documentation

[Marc Tompkins]

On Fri, Feb 20, 2009 at 5:05 PM, Wayne Watson
wrote:

>  Not because of this particular problem, but, out of curiosity, I tried
> today to give the MS command line facility a shot. I think that's what we
> are discussing here. I immediately ran into something of a problem. My
> assumption was is was fully a DOS window.  Trying to work my way to folder
> was a bit daunting, since I have not used this in a very long time, but this
> wasn't the problem.
>
> As it turns out, there was an easier way. Drag and drop the path+program
> link into the window after placing a CD in the command line. Very non-DOS*.
> :-) One could then backspace to remove the program name, so the result was a
> CD to the program folder, where several programs reside. Now the problem
> became one of typing in the name of the program each time it was to be
> executed. With a pretty long path name and the need to type in the file name
> on each use, it seemed a bit tedious.  Maybe there's another way?
>
> * But yet, no copy and paste from the folder Address area
>

Two tips: Command Prompt Here and tab completion.

1) If you haven't already, check out the Windows XP PowerToys:
http://www.microsoft.com/windowsxp/Downloads/powertoys/Xppowertoys.mspx
Most of them are useless (to me, anyway) but the two that are indispensible
- I install them on every (XP) machine I work on - are TweakUI and Command
Prompt Here.  It adds a "Comand Prompt Here" item to the menu when you
right-click on a folder.  I remember seeing a few articles explaining how to
do this yourself - but why bother?

2)  Tab completion is turned on by default in Windows XP - just type the
first few letters of the filename, and Windows will fill in the rest.  If
there are several files that start with what you typed, you might need to
add a few letters to get the right one, but it still saves lots and lots of
typing.  It even intelligently handles long filenames with spaces in them,
putting them in quotes when required.  If it's turned off on your machine,
you can turn it back on through TweakUI (see #1 above) under "Command
Prompt."

So for example, you would right-click on your project folder, select Command
Prompt Here, type "python " followed by "G" and a tab, then Enter.  (Or
maybe "GL" then Tab, or whatever - you get the drift.)

If you want a command prompt in your desktop folder, just right-click on a
folder on your desktop, select CPH, then type "cd.."  Much simpler than
Start/Run/cmd followed by "cd \Documents and Settings\username\Desktop".

Copy and paste DOES work, but not with keyboard shortcuts (presumably, those
are intercepted by the command prompt itself) - right-click in the command
window and select Paste.
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Re: [Tutor] Looking for ConfigObj Documentation

[Wayne Watson]

Title: Signature.html




Not because of this particular problem, but, out of curiosity, I tried
today to give the MS command line facility a shot. I think that's what
we are discussing here. I immediately ran into something of a problem.
My assumption was is was fully a DOS window.  Trying to work my way to
folder was a bit daunting, since I have not used this in a very long
time, but this wasn't the problem. 

As it turns out, there was an easier way. Drag and drop the
path+program link into the window after placing a CD in the command
line. Very non-DOS*. :-) One could then backspace to remove the program
name, so the result was a CD to the program folder, where several
programs reside. Now the problem became one of typing in the name of
the program each time it was to be executed. With a pretty long path
name and the need to type in the file name on each use, it seemed a bit
tedious.  Maybe there's another way?

* But yet, no copy and paste from the folder Address area

P.S. For some very odd reason, now when I press Reply, I get both the
poster's address and Tutor.  It seems to come and go.  Right now it
doesn't work, as I try it one other messages I see on screen. Very odd.

Alan Gauld wrote:

"Wayne Watson"  wrote
  
  
   I just ran the program again straight from
the py file, and it put my the black window with my raw_input prompt.  
  
Thats why, when debugging, its often better to open the command window
first and run the program from the OS prompt. That way you don't lose
any text messages that may be written to the screen.
  
  
Alan G
  
  
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-- 


   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.01 Deg. W, 39.26 Deg. N) GMT-8 hr std. time)


"Nature, to be commanded, must be obeyed."
   -- Sir Francis Bacon 




Web Page: 



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Re: [Tutor] Looking for ConfigObj Documentation

[Alan Gauld]

"Wayne Watson"  wrote

 I just ran the program again straight from the py file, 
and it put my the black window with my raw_input prompt.  


Thats why, when debugging, its often better to open the 
command window first and run the program from the 
OS prompt. That way you don't lose any text messages 
that may be written to the screen.


Alan G

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Re: [Tutor] Looking for ConfigObj Documentation

[Wayne Watson]

Title: Signature.html




Good. Thanks. It works fine for me now.  I deleted the file. I just ran
the program again straight from the py file, and it put my the black
window with my raw_input prompt.  It seems odd that it wouldn't have
left text debris when it crashed.

I've attached a copy of an Initial file. It's still under development,
but pretty close for the immediate purposes. The "_file_" names will
likely end up as a string showing the complete path to the file. 
start/stop_time will be times in
 the format shown, hh:mm:ss. The first line is just a header, and
currently gets tossed when the file is read.  "_name" are strings. No
others have seen the program, so development continues. 



Marc Tompkins wrote:

  On Fri, Feb 20, 2009 at 9:45 AM, Wayne
Watson 
wrote:
  
Marc, I'm reaching back here,
since something seems to have gone awry.
I'm looking at the code for Global_Config1.py. When I execute it from
IDLE, I get again:

  ...
  File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
line 1637, in _parse
    ParseError, infile, cur_index)
  File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
line 1748, in _handle_error
    raise error
  
ParseError: Invalid line at line "1".   <<--- same old, same old

However, we know IDLE can goof up. So I thought I'd execute the code by
double clicking on the file. A black window appears briefly, then
disappears. I have raw_input and other tricks to see if I could slow it
down.  Finally, I went to the MS Command prompt window, and executed
the py file from there. I get exactly the same message (s) as above. I
don't recall if you tried the program on your system. Comments?

  
  
  
  
First: the line "1" it's talking about is the first line of the config
file, not of configobj.py.
Second: as written, there's no GUI here, so we _expect_ it to briefly
show a black window, then close - but when it's done, there should be a
file called "Initial.sen" in the current directory, which will look
like this (this is the output on my machine):
"""
  
mask_file_name = None
gray_scale = True
post_event_stack = False
post_event_format = Tiff 2
show_real_time = False
hourly_rate = 0
slowdown = 1
start_time = 00:00:00
stop_time = 00:00:00
    
"""
(I've added the triple quotes for visual clarity - they don't appear in
the actual file.)
  
I suspect that what's happening is that you already have a file called
Initial.sen, and its contents don't match the configspec.  So the
ParseError is an expected result - we either need to tweak the
configspec to match your previous file, or add exception handling, or
(simplest) if you don't have any real installed base, just start from
scratch.  
  
Do me two favors: 
 - send your existing Initial.sen so I can look at modifying the
configspec or adding exception handling
 - delete or rename it, then try the program again.
  
-- 
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-- 


   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.01 Deg. W, 39.26 Deg. N) GMT-8 hr std. time)


"Nature, to be commanded, must be obeyed."
   -- Sir Francis Bacon 




Web Page: 



Sentinel NC Configuration File Sentinel User 3 - 1/3/2009 (Meteor Software)
config_file_name=Initial.sen
mask_file_name=*none*
gray_scale=True
post_event_stack=False
post_event_format=Tiff 2
show_real_time=False
hourly_rate=12
slowdown=1
start_time=20:00:12
stop_time=06:03:00
lat=40.0
long=120.0
utc_offset=8
elevation=1000.0
site_name=Unknown
clock_drift=0.0
zenith_x_pixel=319
zenith_y_pixel=239
north_angle_rotation=0.0
events=Events
post_events=Post_Events
meteors=Meteor_Tags
composites=wtw:same as events?
flat_mask_val=30
mask_file_name=*none*
mask_file_offset=30
flat_mask_active=False
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Re: [Tutor] File locking: cross platform?

[Chris Fuller]

There's a recipe in the Python Cookbook that addresses this:
http://code.activestate.com/recipes/65203/

There are probably others floating around, too.

Cheers
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Re: [Tutor] Looking for ConfigObj Documentation

[Marc Tompkins]

On Fri, Feb 20, 2009 at 10:45 AM, Paul McGuire  wrote:

> Has anyone already mentioned the article in Python Magazine, May, 2008?
>

No, I for one haven't seen it.  Is it available online, or only for
subscribers?


-- 
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Re: [Tutor] Looking for ConfigObj Documentation

[Marc Tompkins]

On Fri, Feb 20, 2009 at 9:45 AM, Wayne Watson
wrote:

>  Marc, I'm reaching back here, since something seems to have gone awry. I'm
> looking at the code for Global_Config1.py. When I execute it from IDLE, I
> get again:
>
> ...
>   File
> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
> line 1637, in _parse
> ParseError, infile, cur_index)
>   File
> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
> line 1748, in _handle_error
> raise error
> ParseError: Invalid line at line "1".   <<--- same old, same old
>
> However, we know IDLE can goof up. So I thought I'd execute the code by
> double clicking on the file. A black window appears briefly, then
> disappears. I have raw_input and other tricks to see if I could slow it
> down.  Finally, I went to the MS Command prompt window, and executed the py
> file from there. I get exactly the same message (s) as above. I don't recall
> if you tried the program on your system. Comments?
>

First: the line "1" it's talking about is the first line of the config file,
not of configobj.py.
Second: as written, there's no GUI here, so we _expect_ it to briefly show a
black window, then close - but when it's done, there should be a file called
"Initial.sen" in the current directory, which will look like this (this is
the output on my machine):
"""

mask_file_name = None
gray_scale = True
post_event_stack = False
post_event_format = Tiff 2
show_real_time = False
hourly_rate = 0
slowdown = 1
start_time = 00:00:00
stop_time = 00:00:00

"""
(I've added the triple quotes for visual clarity - they don't appear in the
actual file.)

I suspect that what's happening is that you already have a file called
Initial.sen, and its contents don't match the configspec.  So the ParseError
is an expected result - we either need to tweak the configspec to match your
previous file, or add exception handling, or (simplest) if you don't have
any real installed base, just start from scratch.

Do me two favors:
 - send your existing Initial.sen so I can look at modifying the configspec
or adding exception handling
 - delete or rename it, then try the program again.

-- 
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Re: [Tutor] File locking: cross platform?

[bob gailer]

Bernard Rankin wrote:

Hello,

What is the correct way to implement cross-platform "flock like" file locking?

Specifically, how would i acquire "exclusive read-write" and "shared read-only" 
locks for a CGI script that I expect to run on both Windows and Linux servers.


Some other tutor may have a different answer. I propose you 
open(filename, 'r') or open(filename, 'w').


--
Bob Gailer
Chapel Hill NC
919-636-4239
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[Tutor] File locking: cross platform?

[Bernard Rankin]

Hello,

What is the correct way to implement cross-platform "flock like" file locking?

Specifically, how would i acquire "exclusive read-write" and "shared read-only" 
locks for a CGI script that I expect to run on both Windows and Linux servers.

Thank you,
:)



  

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Re: [Tutor] Please remove me from the mailing list

[Kent Johnson]

On Fri, Feb 20, 2009 at 12:38 PM, Jennifer Miller  wrote:
> Hello,
>
> Could you please remove my address from the mailing list?

OK
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Re: [Tutor] Looking for ConfigObj Documentation

[Paul McGuire]

Has anyone already mentioned the article in Python Magazine, May, 2008?

-- Paul

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Re: [Tutor] verify the email

[Emile van Sebille]

jitendra gupta wrote:
is there any way so that i can identify wrong email during the run time 
(when i am sending  the email)


As I understand things, no.  You can validate the domain part, and there 
is the SMTPRecipientsRefused exception, but you won't get that if you're 
relaying.  Further, mail systems (and administrators) are reluctant to 
provide spammers an easy way to validate email lists, so where doors may 
be opened, you're likely to find them closed anyway.


Emile

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Re: [Tutor] Looking for ConfigObj Documentation

[Wayne Watson]

Title: Signature.html




Marc, I'm reaching back here, since something seems to have gone awry.
I'm looking at the code for Global_Config1.py. When I execute it from
IDLE, I get again:
...
  File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
line 1637, in _parse
    ParseError, infile, cur_index)
  File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
line 1748, in _handle_error
    raise error
ParseError: Invalid line at line "1".   <<--- same old, same old

However, we know IDLE can goof up. So I thought I'd execute the code by
double clicking on the file. A black window appears briefly, then
disappears. I have raw_input and other tricks to see if I could slow it
down.  Finally, I went to the MS Command prompt window, and executed
the py file from there. I get exactly the same message (s) as above. I
don't recall if you tried the program on your system. Comments?


Marc Tompkins wrote:

  On Wed, Feb 18, 2009 at 7:42 PM, Wayne
Watson 
wrote:
  
I took your "starter" code,
and formatted it to be what I hope is an
acceptable program, Gobal_Config.py. See attached.  I'm using Python
2.5.2. I put the two modules in the same folder with it, and executed
it in IDLE. I got this:
  ...
  File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
line 1637, in _parse
    ParseError, infile, cur_index)
  File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\configobj.py",
line 1748, in _handle_error
    raise error
ParseError: Invalid line at line "1".

As far as I can tell, line 1 of config.obj looks OK. It's a comment.
Something is amiss.

  
  
I hate to say it, but IDLE is really holding you back.  It's convenient
because it installs automagically with Python, but it does funky,
confusing things - as in this case, where it's somehow stepped on the
real error and assigned blame in the wrong place; you've already
experienced its internal conflicts with Tkinter...  I use wxPython for
my GUI goodness, and swear by SPE (Stani's Python Editor).  I don't
want to re-ignite the IDE wars, but I definitely think you need to do
yourself a favor and move away from IDLE.
  
Anyway, I didn't mean for that to be a standalone program, but to be
picked apart into chunks and dropped into an existing program (or,
actually, just to be used as an example - maybe of what _not_ to do,
but an example...)  
First error: 
    if argv is None:
       argv = sys.argv  <<== you haven't imported "sys"
  
Second error:
    app = MyApp(0)  <<== you haven't defined a class called
"MyApp", so you can't do this...
  
So I cut it down to just this bit:
test = Global.cfgFile.validate(Global.vtor, copy=True)
Global.cfgFile.write()
  
(unindented all the way to the left, so that it executes as the main
body of the program) and it works just fine... except:
Third error (well, issue not error):
Take all my comments out!  They weren't meant to be included in final
code.  ConfigObj allows inline comments in your config file, and in the
configspec - so my comments show up in there too.  Here's what
Initial.sen ends up looking like:
  
  mask_file_name = None
gray_scale = True
post_event_stack = False
post_event_format = Tiff 2
show_real_time = False
hourly_rate = 0
slowdown = 1    # I don't know what
#   this value is/does, so this is probably wrong
start_time = 00:00:00    # or you could make the default None?
stop_time = 00:00:00
    #   as a default latitude, if any...
  
I've cut everything down; I'm attaching it as Global_Config1.py (just
to avoid confusion with the earlier version).  If you do actually want
to use it as the basis of anything, you'll want to place the call to
.validate() somewhere near the beginning of the action - remember, the
call to .write() just afterward is completely optional; I had it in
there for testing and have kept it in there for the same reason.
    
 
  
Does PYTHONPATH apply in Win
XP? I haven't played at the level of paths
for a long time in any OS. We can worry about an install "package"
later for the modules. It might be best for the users of this program. 

  
  
Ya know, I have no idea anymore.  I thought I knew - but I just did a
SET from a command prompt, and I don't have a PYTHONPATH variable.  I
seem to reacall something from a year or two ago... (looking now)  Oh
yes - there's a directory under your Python directory (Python25 in my
case) called "Lib", and a folder under that called "site-packages"; any
text files with the extension ".pth" will be scaned for the names of
folders to add to the search path.  As much as I love Python, I wish
they'd get all this together...
  
  
  
-- 
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   Wayne Watso

[Tutor] Please remove me from the mailing list

[Jennifer Miller]

Hello,

Could you please remove my address from the mailing list?

Thank you,

Jennifer
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Re: [Tutor] Standardizing on Unicode and utf8

[spir]

Le Fri, 20 Feb 2009 02:52:27 -0800,
"Dinesh B Vadhia"  s'exprima ainsi:

> We want to standardize on unicode and utf8 and would like to clarify and
> verify their use to minimize encode()/decode()'ing:
> 
> 1.  Python source files 
> Use the header: # -*- coding: utf8 -*-

You don't even need fancy decoration:

# coding: utf-8

is enough.

Denis
--
la vita e estrany
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Re: [Tutor] Standardizing on Unicode and utf8

[Kent Johnson]

On Fri, Feb 20, 2009 at 5:52 AM, Dinesh B Vadhia
 wrote:
> We want to standardize on unicode and utf8 and would like to clarify and
> verify their use to minimize encode()/decode()'ing:
>
> 1.  Python source files
> Use the header: # -*- coding: utf8 -*-
>
> 2.  Reading files
> In most cases, we don't know the source encoding of the files being read.
> Do we have to decode('utf8') after reading from file?

If you don't know the encoding of the file being read, it is difficult
to handle it correctly. A simple strategy is to try several encodings
and use the first one that reads without error. Note that *any* text
can be decoded using iso-8859-1 (latin-1) or cp1252 so they must be
last in the tests. This strategy can distinguish utf-16-be, utf-16-le,
utf-8, iso-8859-1 but it can't discriminate between any of the
iso-8859-x variants because they all will decode anything (they have
characters at every code point).

A more sophisticated strategy is to look for character patterns, see
Mark Pilgrim's Universal Encoding Detector:
http://chardet.feedparser.org/docs/

Best is not to get into this situation to begin with... Where are the
files coming from? If they are from web pages, they often have
metadata which gives the charset.

> 3. Writing files
> We will always write to files in utf8.  Do we have to encode('utf8') before
> writing to file?

Yes. The codecs module can help with reading and writing files, it
creates file-like objects that encode/decode on the fly.

> Is there anything else that we have to consider?

Console output also has to be decoded to the charset of the console
(sys.stdout.encoding).

Kent
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Re: [Tutor] wxPython dialog problem

[Kent Johnson]

On Thu, Feb 19, 2009 at 11:04 PM, Garry Willgoose
 wrote:
> I'm just porting an old code from a GUI in Tkinter to one in wxPython and am
> having a problem with one of the dialog widgets. This is on OSX. The code
> below gives the result
>
> result= 5104 5103 5104
>
> as expected but if I substitute the single line form that is commented out
> (as per the wxPython book) I get
>
> result= 2 5103 5104
>
> can anyone enlighten me as to what is going on? I;m on OSX python 2.5.2 and
> wxPython 2.8.9.1

Apparently ShowModal() returns one of
wxID_OK, wxID_CANCEL, wxID_YES, wxID_NO
whereas MessageBox() returns one of
wxYES, wxNO, wxCANCEL, wxOK

These are not the same:
In [1]: import wx

In [3]: wx.ID_OK, wx.ID_CANCEL, wx.ID_YES, wx.ID_NO
Out[3]: (5100, 5101, 5103, 5104)

In [4]: wx.YES, wx.NO, wx.CANCEL, wx.OK
Out[4]: (2, 8, 16, 4)

Kent
>
> code fragment
>
>  dlg=wx.MessageDialog(None,text,title,wx.YES_NO | wx.ICON_QUESTION)
>  result=dlg.ShowModal()
> #  result=wx.MessageBox(text,title,wx.YES_NO | wx.ICON_QUESTION)
>  print 'result=',result,wx.ID_YES,wx.ID_NO
>
> end code fragment
>
>
>
>
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[Tutor] Standardizing on Unicode and utf8

[Dinesh B Vadhia]

We want to standardize on unicode and utf8 and would like to clarify and verify 
their use to minimize encode()/decode()'ing:

1.  Python source files 
Use the header: # -*- coding: utf8 -*-

2.  Reading files
In most cases, we don't know the source encoding of the files being read.  Do 
we have to decode('utf8') after reading from file?

3. Writing files
We will always write to files in utf8.  Do we have to encode('utf8') before 
writing to file?

Is there anything else that we have to consider?

Cheers

Dinesh

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Re: [Tutor] I have a question plz help

[Alan Gauld]

"rev pacce"  wrote 

My mom and I have been trying to hack into the administrator 
account on our laptop my mom got from her job 


We don't deal with that kind of hacking on this list.

But consider what might happen if you succeed. Suppose 
Mom's PC develops a fault and her IT people try to go into 
administrator and find the password has been changed? 
She could lose her job! They don't tell you the password 
so you don't change anything and therefore don't mess up 
the PC settings. It costs businesses a heap of money 
fixing "broken" PCs. Many companies would consider 
that malicious damage of company property and sack her...


Is it worth it just to play iTunes?

Alan g

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