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Diffstat (limited to 'Doc/library/filecmp.rst')
| -rw-r--r-- | Doc/library/filecmp.rst | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/Doc/library/filecmp.rst b/Doc/library/filecmp.rst index 8a88f8c..8471a72 100644 --- a/Doc/library/filecmp.rst +++ b/Doc/library/filecmp.rst @@ -27,6 +27,10 @@ The :mod:`filecmp` module defines the following functions: Note that no external programs are called from this function, giving it portability and efficiency. + This function uses a cache for past comparisons and the results, + with a cache invalidation mechanism relying on stale signatures + or by explicitly calling :func:`clear_cache`. + .. function:: cmpfiles(dir1, dir2, common, shallow=True) @@ -48,6 +52,15 @@ The :mod:`filecmp` module defines the following functions: one of the three returned lists. +.. function:: clear_cache() + + .. versionadded:: 3.4 + + Clear the filecmp cache. This may be useful if a file is compared so quickly + after it is modified that it is within the mtime resolution of + the underlying filesystem. + + .. _dircmp-objects: The :class:`dircmp` class @@ -55,28 +68,25 @@ The :class:`dircmp` class .. class:: dircmp(a, b, ignore=None, hide=None) - Construct a new directory comparison object, to compare the directories *a* and - *b*. *ignore* is a list of names to ignore, and defaults to ``['RCS', 'CVS', - 'tags']``. *hide* is a list of names to hide, and defaults to ``[os.curdir, - os.pardir]``. + Construct a new directory comparison object, to compare the directories *a* + and *b*. *ignore* is a list of names to ignore, and defaults to + :attr:`filecmp.DEFAULT_IGNORES`. *hide* is a list of names to hide, and + defaults to ``[os.curdir, os.pardir]``. The :class:`dircmp` class compares files by doing *shallow* comparisons as described for :func:`filecmp.cmp`. The :class:`dircmp` class provides the following methods: - .. method:: report() Print (to :data:`sys.stdout`) a comparison between *a* and *b*. - .. method:: report_partial_closure() Print a comparison between *a* and *b* and common immediate subdirectories. - .. method:: report_full_closure() Print a comparison between *a* and *b* and common subdirectories @@ -133,7 +143,7 @@ The :class:`dircmp` class .. attribute:: common_files - Files in both *a* and *b* + Files in both *a* and *b*. .. attribute:: common_funny @@ -164,6 +174,12 @@ The :class:`dircmp` class A dictionary mapping names in :attr:`common_dirs` to :class:`dircmp` objects. +.. attribute:: DEFAULT_IGNORES + + .. versionadded:: 3.4 + + List of directories ignored by :class:`dircmp` by default. + Here is a simplified example of using the ``subdirs`` attribute to search recursively through two directories to show common different files:: |