Hello everyone:
I came across the module ConfigParser and can use it correctly.
import ConfigParser
fp = open('test.cfg' ,'w+')
config = ConfigParser.Co nfigParser()
config.readfp(f p)
config.add_sect ion('test')
config.set('tes t', 'haha', 'hehe')
print config.sections ()
config.write(fp )
['test']
Traceback (most recent call last):
File "configparser.p y", line 8, in ?
config.write(fp )
File "C:\Python24\li b\ConfigParser. py", line 369, in write
fp.write("[%s]\n" % section)
IOError: (0, 'Error')
I trace into the module and when executing the line "fp.write("[%s]\n"
% section)", I find every parameter is correct: fp is still a open file
object and section is 'test', I may miss something, but I just cannot
figure it out. Can someone tell me what's going wrong here?
Thanks 1 2018
pipehappy wrote: Hello everyone:
I came across the module ConfigParser and can use it correctly.
import ConfigParser fp = open('test.cfg' ,'w+') config = ConfigParser.Co nfigParser() config.readfp(f p) config.add_sect ion('test') config.set('tes t', 'haha', 'hehe') print config.sections () config.write(fp )
['test'] Traceback (most recent call last): File "configparser.p y", line 8, in ? config.write(fp ) File "C:\Python24\li b\ConfigParser. py", line 369, in write fp.write("[%s]\n" % section) IOError: (0, 'Error')
I trace into the module and when executing the line "fp.write("[%s]\n" % section)", I find every parameter is correct: fp is still a open file object and section is 'test', I may miss something, but I just cannot figure it out. Can someone tell me what's going wrong here?
What is the exact intent of your code? Note that the "w+" mode is
documented as truncating the file, which means that your starting
configuration will always be null. My first thoughts were therefore
related to file position,
For what it's worth, however, note that on my system (Cygwin 2.4.3) this
code only breaks the *second* time: import ConfigParser fp = open('test.cfg' ,'w+') config = ConfigParser.Co nfigParser() config.readfp(f p) config.add_sect ion('test') config.set('tes t', 'haha', 'hehe') print config.sections ()
['test'] config.write(fp ) ### should really have closed fp here? import ConfigParser fp = open('test.cfg' ,'w+') config = ConfigParser.Co nfigParser() config.readfp(f p) config.add_sect ion('test')
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/lib/python2.4/ConfigParser.py ", line 226, in add_section
raise DuplicateSectio nError(section)
ConfigParser.Du plicateSectionE rror: Section 'test' already exists config.set('tes t', 'haha', 'hehe') print config.sections ()
['test'] config.write(fp )
Adding a seel to the start of the file before the failing statement
seems to fix the problem, so I guess my conjecture was right. Try
import ConfigParser
fp = open('test.cfg' ,'w+')
config = ConfigParser.Co nfigParser()
config.readfp(f p)
config.add_sect ion('test')
config.set('tes t', 'haha', 'hehe')
print config.sections ()
fp.seek(0)
config.write(fp )
fp.close()
But then fix that "w+" if this is more than just a test app!
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Love me, love my blog http://holdenweb.blogspot.com
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