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Danil Dotsenko
*nix forums beginner
Joined: 20 Jul 2006
Posts: 3
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 Posted: Thu Jul 20, 2006 5:50 pm Post subject:
ConfigParser: what read('non-existent-filename') returns in 2.3.x?
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Wrote a little "user-friedly" wrapper for ConfigParser for a KDE's
SuperKaramba widget.
(http://www.kde-look.org/content/show.php?content=32185)
I was using 2.4.x python docs as reference and
ConfigParser.read('non-existent-filename') returns [] in 2.4.x
One user with 2.3.x reported an error stemming from my use of
len(cfgObject.read('potentially-non-existent-filename'))
File "/home/web/Downloads/afoto-1.5b6.skz/localConf.py", line 53, in load
TypeError: len() of unsized object
Can anyone tell me what cfgObject.read('potentially-non-existent-filename')
returns in 2.3.x?
My output:
| Quote: | import ConfigParser
cfg = ConfigParser.ConfigParser()
a = cfg.read('adsfasfdasfd')
a, len(a), type(a)
([], 0, <type 'list'>) |
Thx in advance.
Daniel. |
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Chris Lambacher
*nix forums addict
Joined: 16 May 2005
Posts: 65
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| Posted: Thu Jul 20, 2006 7:30 pm Post subject:
Re: ConfigParser: what read('non-existent-filename') returns in 2.3.x?
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On Thu, Jul 20, 2006 at 10:50:40AM -0700, Danil Dotsenko wrote:
| Quote: | Wrote a little "user-friedly" wrapper for ConfigParser for a KDE's
SuperKaramba widget.
(http://www.kde-look.org/content/show.php?content=32185)
I was using 2.4.x python docs as reference and
ConfigParser.read('non-existent-filename') returns [] in 2.4.x
http://docs.python.org/lib/RawConfigParser-objects.html |
That agrees with the docs since read returns a list of successfully parsed
filenames. Note the docs also say this was added in 2.4.
| Quote: |
One user with 2.3.x reported an error stemming from my use of
len(cfgObject.read('potentially-non-existent-filename'))
File "/home/web/Downloads/afoto-1.5b6.skz/localConf.py", line 53, in load
TypeError: len() of unsized object
Can anyone tell me what cfgObject.read('potentially-non-existent-filename')
returns in 2.3.x?
I suspect it never returns anything which means you are getting None instead |
of a list, which would give you the exception above.
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Danil Dotsenko
*nix forums beginner
Joined: 20 Jul 2006
Posts: 3
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| Posted: Thu Jul 20, 2006 9:01 pm Post subject:
Re: ConfigParser: what read('non-existent-filename') returns in 2.3.x?
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Chris Lambacher wrote:
| Quote: | On Thu, Jul 20, 2006 at 10:50:40AM -0700, Danil Dotsenko wrote:
Wrote a little "user-friedly" wrapper for ConfigParser for a KDE's
SuperKaramba widget.
(http://www.kde-look.org/content/show.php?content=32185)
I was using 2.4.x python docs as reference and
ConfigParser.read('non-existent-filename') returns [] in 2.4.x
http://docs.python.org/lib/RawConfigParser-objects.html
That agrees with the docs since read returns a list of successfully parsed
filenames. Note the docs also say this was added in 2.4.
|
I just looked at the
http://www.python.org/doc/2.3.5/lib/RawConfigParser-objects.html
(note the version number) and see the following:
"If none of the named files exist, the ConfigParser instance will contain an
empty dataset." Which to me means []. To the least of it, the statement
should be clarified, but I would still kindly prefer to have someone
respond / confirm the procedure bellow gives different results in 2.3.x.
| Quote: | import ConfigParser
cfg = ConfigParser.ConfigParser()
a = cfg.read('adsfasfdasfd')
a, len(a), type(a)
([], 0, <type 'list'>)
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Thx in advance. |
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Danil Dotsenko
*nix forums beginner
Joined: 20 Jul 2006
Posts: 3
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| Posted: Thu Jul 20, 2006 9:19 pm Post subject:
Re: ConfigParser: what read('non-existent-filename') returns in 2.3.x?
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Danil Dotsenko wrote:
| Quote: | Chris Lambacher wrote:
On Thu, Jul 20, 2006 at 10:50:40AM -0700, Danil Dotsenko wrote:
Wrote a little "user-friedly" wrapper for ConfigParser for a KDE's
SuperKaramba widget.
(http://www.kde-look.org/content/show.php?content=32185)
I was using 2.4.x python docs as reference and
ConfigParser.read('non-existent-filename') returns [] in 2.4.x
http://docs.python.org/lib/RawConfigParser-objects.html
That agrees with the docs since read returns a list of successfully
parsed
filenames. Note the docs also say this was added in 2.4.
I just looked at the
http://www.python.org/doc/2.3.5/lib/RawConfigParser-objects.html
(note the version number) and see the following:
"If none of the named files exist, the ConfigParser instance will contain
an empty dataset." Which to me means []. To the least of it, the statement
should be clarified, but I would still kindly prefer to have someone
respond / confirm the procedure bellow gives different results in 2.3.x.
import ConfigParser
cfg = ConfigParser.ConfigParser()
a = cfg.read('adsfasfdasfd')
a, len(a), type(a)
([], 0, <type 'list'>)
Thx in advance.
|
Python 2.3.5 (#2, Jun 13 2006, 23:12:55)
[GCC 4.1.2 20060613 (prerelease) (Debian 4.1.1-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ConfigParser
>>> cfg = ConfigParser.ConfigParser()
>>> a = cfg.read('adsfasfdasfd')
>>> a
>>> type(a)
<type 'NoneType'>
>>> len(a)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: len() of unsized object
>>> |
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Chris Lambacher
*nix forums addict
Joined: 16 May 2005
Posts: 65
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| Posted: Fri Jul 21, 2006 1:57 pm Post subject:
Re: ConfigParser: what read('non-existent-filename') returns in 2.3.x?
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On Thu, Jul 20, 2006 at 02:01:08PM -0700, Danil Dotsenko wrote:
| Quote: | Chris Lambacher wrote:
On Thu, Jul 20, 2006 at 10:50:40AM -0700, Danil Dotsenko wrote:
Wrote a little "user-friedly" wrapper for ConfigParser for a KDE's
SuperKaramba widget.
(http://www.kde-look.org/content/show.php?content=32185)
I was using 2.4.x python docs as reference and
ConfigParser.read('non-existent-filename') returns [] in 2.4.x
http://docs.python.org/lib/RawConfigParser-objects.html
That agrees with the docs since read returns a list of successfully parsed
filenames. Note the docs also say this was added in 2.4.
I just looked at the
http://www.python.org/doc/2.3.5/lib/RawConfigParser-objects.html
(note the version number) and see the following:
"If none of the named files exist, the ConfigParser instance will contain an
empty dataset." Which to me means []. To the least of it, the statement
should be clarified, but I would still kindly prefer to have someone
respond / confirm the procedure bellow gives different results in 2.3.x.
That says nothing about the return value. It says that the ConfigParser |
object will contain an empty data set, ie:
config.sections() == []
NOT
config.read(['doesnotexist.cfg']) == []
since config.read does not explicitly return anything, and therefore you get
None.
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