extensions.py 文件源码

def reload_extension(self, module_str):
        """Reload an IPython extension by calling reload.

        If the module has not been loaded before,
        :meth:`InteractiveShell.load_extension` is called. Otherwise
        :func:`reload` is called and then the :func:`load_ipython_extension`
        function of the module, if it exists is called.
        """
        from IPython.utils.syspathcontext import prepended_to_syspath

        if (module_str in self.loaded) and (module_str in sys.modules):
            self.unload_extension(module_str)
            mod = sys.modules[module_str]
            with prepended_to_syspath(self.ipython_extension_dir):
                reload(mod)
            if self._call_load_ipython_extension(mod):
                self.loaded.add(module_str)
        else:
            self.load_extension(module_str)