Python ctypes 模块，_reset_cache() 实例源码

def _reset_cache():
        ctypes._win_functype_cache.clear()
        _original_reset_cache()

def dash_R_cleanup(fs, ps, pic, zdc, abcs):
    import gc, copy_reg
    import _strptime, linecache
    dircache = test_support.import_module('dircache', deprecated=True)
    import urlparse, urllib, urllib2, mimetypes, doctest
    import struct, filecmp
    from distutils.dir_util import _path_created

    # Clear the warnings registry, so they can be displayed again
    for mod in sys.modules.values():
        if hasattr(mod, '__warningregistry__'):
            del mod.__warningregistry__

    # Restore some original values.
    warnings.filters[:] = fs
    copy_reg.dispatch_table.clear()
    copy_reg.dispatch_table.update(ps)
    sys.path_importer_cache.clear()
    sys.path_importer_cache.update(pic)
    try:
        import zipimport
    except ImportError:
        pass # Run unmodified on platforms without zipimport support
    else:
        zipimport._zip_directory_cache.clear()
        zipimport._zip_directory_cache.update(zdc)

    # clear type cache
    sys._clear_type_cache()

    # Clear ABC registries, restoring previously saved ABC registries.
    for abc, registry in abcs.items():
        abc._abc_registry = registry.copy()
        abc._abc_cache.clear()
        abc._abc_negative_cache.clear()

    # Clear assorted module caches.
    _path_created.clear()
    re.purge()
    _strptime._regex_cache.clear()
    urlparse.clear_cache()
    urllib.urlcleanup()
    urllib2.install_opener(None)
    dircache.reset()
    linecache.clearcache()
    mimetypes._default_mime_types()
    filecmp._cache.clear()
    struct._clearcache()
    doctest.master = None
    try:
        import ctypes
    except ImportError:
        # Don't worry about resetting the cache if ctypes is not supported
        pass
    else:
        ctypes._reset_cache()

    # Collect cyclic trash.
    gc.collect()

def dash_R_cleanup(fs, ps, pic, zdc, abcs):
    import gc, copy_reg
    import _strptime, linecache
    dircache = test_support.import_module('dircache', deprecated=True)
    import urlparse, urllib, urllib2, mimetypes, doctest
    import struct, filecmp
    from distutils.dir_util import _path_created

    # Clear the warnings registry, so they can be displayed again
    for mod in sys.modules.values():
        if hasattr(mod, '__warningregistry__'):
            del mod.__warningregistry__

    # Restore some original values.
    warnings.filters[:] = fs
    copy_reg.dispatch_table.clear()
    copy_reg.dispatch_table.update(ps)
    sys.path_importer_cache.clear()
    sys.path_importer_cache.update(pic)
    try:
        import zipimport
    except ImportError:
        pass # Run unmodified on platforms without zipimport support
    else:
        zipimport._zip_directory_cache.clear()
        zipimport._zip_directory_cache.update(zdc)

    # clear type cache
    sys._clear_type_cache()

    # Clear ABC registries, restoring previously saved ABC registries.
    for abc, registry in abcs.items():
        abc._abc_registry = registry.copy()
        abc._abc_cache.clear()
        abc._abc_negative_cache.clear()

    # Clear assorted module caches.
    _path_created.clear()
    re.purge()
    _strptime._regex_cache.clear()
    urlparse.clear_cache()
    urllib.urlcleanup()
    urllib2.install_opener(None)
    dircache.reset()
    linecache.clearcache()
    mimetypes._default_mime_types()
    filecmp._cache.clear()
    struct._clearcache()
    doctest.master = None
    try:
        import ctypes
    except ImportError:
        # Don't worry about resetting the cache if ctypes is not supported
        pass
    else:
        ctypes._reset_cache()

    # Collect cyclic trash.
    gc.collect()