runpy.py 文件源码

def run_module(mod_name, init_globals=None,
               run_name=None, alter_sys=False):
    """Execute a module's code without importing it

       Returns the resulting top level namespace dictionary
    """
    mod_name, loader, code, fname = _get_module_details(mod_name)
    if run_name is None:
        run_name = mod_name
    pkg_name = mod_name.rpartition('.')[0]
    if alter_sys:
        return _run_module_code(code, init_globals, run_name,
                                fname, loader, pkg_name)
    else:
        # Leave the sys module alone
        return _run_code(code, {}, init_globals, run_name,
                         fname, loader, pkg_name)


# XXX (ncoghlan): Perhaps expose the C API function
# as imp.get_importer instead of reimplementing it in Python?