Method test_can_pickle

tests/test_interactiveshell.py:182–206

Can we pickle objects defined interactively (GH-29)

(self)

            ip.compile.reset_compiler_flags()

    def test_can_pickle(self):
        "Can we pickle objects defined interactively (GH-29)"
        ip = get_ipython()
        ip.reset()
        ip.run_cell(
            (
                "class Mylist(list):\n"
                "    def __init__(self,x=[]):\n"
                "        list.__init__(self,x)"
            )
        )
        ip.run_cell("w=Mylist([1,2,3])")

        from pickle import dumps

        # We need to swap in our main module - this is only necessary
        # inside the test framework, because IPython puts the interactive module
        # in place (but the test framework undoes this).
        _main = sys.modules["__main__"]
        sys.modules["__main__"] = ip.user_module
        try:
            res = dumps(ip.user_ns["w"])
        finally:
            sys.modules["__main__"] = _main
        self.assertTrue(isinstance(res, bytes))

    def test_global_ns(self):
        "Code in functions must be able to access variables outside them."