langhelpers.py 文件源码

def __call__(self, fn):
        import_deps = self.import_deps
        spec = compat.inspect_getfullargspec(fn)

        spec_zero = list(spec[0])
        hasself = spec_zero[0] in ('self', 'cls')

        for i in range(len(import_deps)):
            spec[0][i + (1 if hasself else 0)] = "import_deps[%r]" % i

        inner_spec = format_argspec_plus(spec, grouped=False)

        for impname in import_deps:
            del spec_zero[1 if hasself else 0]
        spec[0][:] = spec_zero

        outer_spec = format_argspec_plus(spec, grouped=False)

        code = 'lambda %(args)s: fn(%(apply_kw)s)' % {
            "args": outer_spec['args'],
            "apply_kw": inner_spec['apply_kw']
        }

        decorated = eval(code, locals())
        decorated.__defaults__ = getattr(fn, 'im_func', fn).__defaults__
        return update_wrapper(decorated, fn)