gh-88513: clarify shutil.copytree's dirs_exist_ok arg (GH-91434)

* add a paragraph to document this kwarg in detail
* update docstring in the source accordingly
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Jack DeVries 2022-04-11 20:57:52 -04:00 committed by GitHub
parent 9ebcece82f
commit f33e2c87a8
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3 changed files with 17 additions and 9 deletions

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@ -518,9 +518,6 @@ def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
ignore_dangling_symlinks=False, dirs_exist_ok=False):
"""Recursively copy a directory tree and return the destination directory.
dirs_exist_ok dictates whether to raise an exception in case dst or any
missing parent directory already exists.
If exception(s) occur, an Error is raised with a list of reasons.
If the optional symlinks flag is true, symbolic links in the
@ -551,6 +548,11 @@ def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
destination path as arguments. By default, copy2() is used, but any
function that supports the same signature (like copy()) can be used.
If dirs_exist_ok is false (the default) and `dst` already exists, a
`FileExistsError` is raised. If `dirs_exist_ok` is true, the copying
operation will continue if it encounters existing directories, and files
within the `dst` tree will be overwritten by corresponding files from the
`src` tree.
"""
sys.audit("shutil.copytree", src, dst)
with os.scandir(src) as itr: