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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def file_complete(self, prefix, args):
 """ Look in the local filesystem for valid file choices. """

        path = os.path.expanduser(prefix)
        dirname, name = os.path.split(path)
        if not dirname:
            dirname = '.'
        try:
            dirs = os.listdir(dirname)
        except FileNotFoundError:
            return frozenset()
        choices = []
        session = self.calling_command.session
        for f in dirs:
            try:
                if (not name or f.startswith(name)) and \
                   not f.startswith('.'):
                    choices.append(f)
            except PermissionError:
                pass
        prevent_pad = session.pad_completion and len(choices) == 1 and \
            os.path.isdir(choices[0])
        names = [os.path.join(dirname, x) for x in choices]
        if prevent_pad:
            names.append(names[0] + '/')
        return frozenset(names)