13.05.19 12:38, Tom Hale пише:
As suggested by Toshio Kuratomi at https://bugs.python.org/issue36656, I
am raising this here for inclusion in the shutil module.
Mimicking POSIX, os.symlink() will raise FileExistsError if the link
name to be created already exists.
A common use case is overwriting an existing file (often a symlink) with
a symlink. Naively, one would delete the file named link_name file if it
exists, then call symlink(). This "solution" is already 3 lines of code,
and without exception handling it introduces the race condition of a
file named link_name being created between unlink and symlink.
Depending on the functionality required, I suggest:
* os.symlink() - the new link name is expected to NOT exist
* shutil.symlink() - the new symlink replaces an existing file
Sorry, but I do not understand what problem do you try to solve. If
somebody can create a file named link_name between unlink and symlink,
he can also remove and create a file named link_name after symlink.
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