3 examples of 'shutil move overwrite' in Python

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def replace(src, dst):
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    """os.replace compat wrapper
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    This has the semantics of a simple os.replace in Python3.
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    >>> import tempfile, shutil
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    >>> t = tempfile.mkdtemp()
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    >>> f1 = os.path.join(t, "f1");
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    >>> f2 = os.path.join(t, "f2");
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    >>> for i, f in enumerate([f1, f2]):
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    ...     with open(f, "w") as fp:
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    ...         pass
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    >>> assert os.path.isfile(f1)
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    >>> assert os.path.isfile(f2)
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    >>> replace(f1, f2)
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    >>> assert not os.path.isfile(f1)
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    >>> assert os.path.isfile(f2)
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    >>> shutil.rmtree(t)
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    Idea adapted from .
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    """
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    _replace(src, dst)

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def copy_wo_overwrite(dir_, file_to_copy):
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    basename = os.path.basename(file_to_copy)
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    i = 0
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    basename, ending = os.path.splitext(basename)
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    basename = basename + "_run{}" + ending
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    while True:
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        if os.path.isfile(
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                os.path.join(dir_, basename.format(i))):
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            i += 1
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            continue
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        else:
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            copyfile(file_to_copy,
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                     os.path.join(dir_, basename.format(i)))
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            break

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def copyfile(src, dst):
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    """Copy data from src to dst"""
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    if _samefile(src, dst):
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        raise Error("`%s` and `%s` are the same file" % (src, dst))
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    with open(src, 'rb') as fsrc:
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        with open(dst, 'wb') as fdst:
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            copyfileobj(fsrc, fdst)