ConfigParser : overwrite ?

2005-07-17 Thread cantabile 
Hi, I'm trying and updating an .ini file with ConfigParser but each time
I call 'write', it appends the whole options another time to the file.
For example :
Here's the inital ini file

[section1]
foodir: %(dir)s/whatever
dir: foo

Here's my code :
filename = ...
config = ConfigParser.ConfigParser()
config.read(filename)
config.set('section1', 'dir', 'anotherdir')
f = open(filename, 'r+')
config.write(f)
f.close()

Then I get :

[section1]
foodir: %(dir)s/whatever
dir: anotherdir

[section1]
foodir: %(dir)s/whatever
dir: foo


I tried also with 'w', 'w+', 'a' ...

What's the correct way to avoid this ?
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Re: ConfigParser : overwrite ?

2005-07-17 Thread Robert Kern 
cantabile wrote:
> Hi, I'm trying and updating an .ini file with ConfigParser but each time
> I call 'write', it appends the whole options another time to the file.
> For example :
> Here's the inital ini file
> 
> [section1]
> foodir: %(dir)s/whatever
> dir: foo
> 
> Here's my code :
> filename = ...
> config = ConfigParser.ConfigParser()
> config.read(filename)
> config.set('section1', 'dir', 'anotherdir')
> f = open(filename, 'r+')
> config.write(f)
> f.close()
> 
> Then I get :
> 
> [section1]
> foodir: %(dir)s/whatever
> dir: anotherdir
> 
> [section1]
> foodir: %(dir)s/whatever
> dir: foo
> 
> I tried also with 'w', 'w+', 'a' ...

Are you sure you tried it with 'w' as the mode?

In [1]: !cat foo.ini
[section1]
foodir: %(dir)s/whatever
dir: foo
In [2]: fn = 'foo.ini'

In [3]: import ConfigParser

In [4]: cfg = ConfigParser.ConfigParser()

In [5]: cfg.read(fn)
Out[5]: ['foo.ini']

In [6]: cfg.set('section1', 'dir', 'anotherdir')

In [7]: f = open(fn, 'w')

In [8]: cfg.write(f)

In [9]: f.close()

In [10]: !cat foo.ini
[section1]
foodir = %(dir)s/whatever
dir = anotherdir

-- 
Robert Kern
[EMAIL PROTECTED]

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter

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Re: ConfigParser : overwrite ?

2005-07-17 Thread cantabile 
Robert Kern a écrit :
> cantabile wrote:
> 
>> Hi, I'm trying and updating an .ini file with ConfigParser but each time
>> I call 'write', it appends the whole options another time to the file.
>> For example :
>> Here's the inital ini file
>>
>> [section1]
>> foodir: %(dir)s/whatever
>> dir: foo
>>
>> Here's my code :
>> filename = ...
>> config = ConfigParser.ConfigParser()
>> config.read(filename)
>> config.set('section1', 'dir', 'anotherdir')
>> f = open(filename, 'r+')
>> config.write(f)
>> f.close()
>>
>> Then I get :
>>
>> [section1]
>> foodir: %(dir)s/whatever
>> dir: anotherdir
>>
>> [section1]
>> foodir: %(dir)s/whatever
>> dir: foo
>>
>> I tried also with 'w', 'w+', 'a' ...
> 
> 
> Are you sure you tried it with 'w' as the mode?
> 
> In [1]: !cat foo.ini
> [section1]
> foodir: %(dir)s/whatever
> dir: foo
> In [2]: fn = 'foo.ini'
> 
> In [3]: import ConfigParser
> 
> In [4]: cfg = ConfigParser.ConfigParser()
> 
> In [5]: cfg.read(fn)
> Out[5]: ['foo.ini']
> 
> In [6]: cfg.set('section1', 'dir', 'anotherdir')
> 
> In [7]: f = open(fn, 'w')
> 
> In [8]: cfg.write(f)
> 
> In [9]: f.close()
> 
> In [10]: !cat foo.ini
> [section1]
> foodir = %(dir)s/whatever
> dir = anotherdir
> 
You are right, it works.
I thought I had tried it ...
Thanks. :)
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