STINNER Victor <[email protected]> added the comment:
> To help address the original report filing issue, we could add a notion of
> .co_cwd to code objects for use in resolving co_filename. Allow it to be ''
> if getcwd failed at source load time. Code could check if co_cwd exists and
> join it with the co_filename. Also let co_cwd remain empty when there is no
> valid co_filename for the code.
Do you mean that co_filename attribute of code objects must remain relative?
> Preaching: Code that calls os.chdir() is always a potential problem as it
> alters process global state. That call is best avoided as modifying globals
> is impolite.
I thought that calling os.chdir("/") is a good practice when launching a
program as a daemon. And thne call os.fork() twice to detach the process from
its parent and run it in background.
I commonly use os.chdir() in my programs for various reasons. A classical use
case is to mimick a shell script doing something like (cd $DIRECTORY; command):
temporary change the current directory.
cwd parameter of subprocess.Popen helps to avoid changing the currently
directory, but sometimes subprocess is not used at all.
Maybe avoiding os.chdir() is a good practice, but it's hard to prevent users to
call it. I don't see how os.chdir() is bad by design. I'm not sure that it's
really useful to debate this neither :-)
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<https://bugs.python.org/issue20443>
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