On 03/15/2012 10:42 PM, Cameron Simpson wrote: > On 14Mar2012 13:13, Tim Chase <python.l...@tim.thechases.com> wrote: > | On 03/14/12 12:06, Terry Reedy wrote: > | > On 3/14/2012 6:07 AM, Gelonida N wrote: > | >> Now I'm looking for a library, which behaves like config parser, but > | >> with one minor difference. > | >> > | >> The write() mehtod should keep existing comments. > | > > | > Assuming that you have not overlooked anything, I would just subclass > | > ConfigParser with an altered write method. > | > | It would require a lot more than that. It would entail changing > | the reading as well so that it preserved the comments as well as > | the order of sections & keys, and a way of storing those > | associated comments in sequence. I looked into it a fair while > | back and it was a LOT more work than I cared to do for minimal > | gain. I wimped out and just documented it with "If you use the > | ability to (re)write a configuration file, it will not keep any > | comments or ordering from any original sources." > > A low cost approach might be to patch the file instead of transcribing > the in-memory state. Not the same semantics, but it would not be too > hard to add a patch_config(filename, section, setting, value) that read > the old file and wrote a new one with an adjusted section, ignoring the > in-memory state (indeed, on that basis the siganture isn't a method but > a standalone function). > > The logic is easy enough that I even wrote a shell script in 2004 to do > essentially this: > > > https://bitbucket.org/cameron_simpson/css/src/ef42896872b5/bin/winclauseappend > > One could imagine an efficient python implementation and a ConfigParser > subclass that patched the file if a setting got changed, or had a .patch > method to apply particular setting changes as desired. >
Agreed, patching is simpler than parsing the file and keeping all the comment info in the config object. I will also look at ConfigObj as suggested by Steven and Karim If this does what I want, then it's probably less effort to use this library than patching Configparser. -- http://mail.python.org/mailman/listinfo/python-list
