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Utility functions for operating on single files.
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f�n|oti||||��q�|d	fS(s�Copy a file 'src' to 'dst'.  If 'dst' is a directory, then 'src' is
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    is true (the default), the file's mode (type and permission bits, or
    whatever is analogous on the current platform) is copied.  If
    'preserve_times' is true (the default), the last-modified and
    last-access times are copied as well.  If 'update' is true, 'src' will
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    'link' allows you to make hard links (os.link) or symbolic links
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    Under Mac OS, uses the native file copy function in macostools; on
    other systems, uses '_copy_file_contents()' to copy file contents.

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s%Move a file 'src' to 'dst'.  If 'dst' is a directory, the file will
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    other systems???
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