def syspathinsert(self, path=None):
if path is None:<EOL><INDENT>path = self.tmpdir<EOL><DEDENT>self.monkeypatch.syspath_prepend(str(path))<EOL>
Prepend a directory to sys.path, defaults to :py:attr:`tmpdir`.

        This is undone automatically when this object dies at the end of each
        test.