imp.py 文件源码

def load_source(name, pathname, file=None):
    loader = _LoadSourceCompatibility(name, pathname, file)
    spec = util.spec_from_file_location(name, pathname, loader=loader)
    if name in sys.modules:
        module = _exec(spec, sys.modules[name])
    else:
        module = _load(spec)
    # To allow reloading to potentially work, use a non-hacked loader which
    # won't rely on a now-closed file object.
    module.__loader__ = machinery.SourceFileLoader(name, pathname)
    module.__spec__.loader = module.__loader__
    return module