imputil.py 文件源码

def __init__(self, fs_imp=None):
        # we're definitely going to be importing something in the future,
        # so let's just load the OS-related facilities.
        if not _os_stat:
            _os_bootstrap()

        # This is the Importer that we use for grabbing stuff from the
        # filesystem. It defines one more method (import_from_dir) for our use.
        if fs_imp is None:
            cls = self.clsFilesystemImporter or _FilesystemImporter
            fs_imp = cls()
        self.fs_imp = fs_imp

        # Initialize the set of suffixes that we recognize and import.
        # The default will import dynamic-load modules first, followed by
        # .py files (or a .py file's cached bytecode)
        for desc in imp.get_suffixes():
            if desc[2] == imp.C_EXTENSION:
                self.add_suffix(desc[0],
                                DynLoadSuffixImporter(desc).import_file)
        self.add_suffix('.py', py_suffix_importer)