antvconst

import functools


def contextmanager(function):
    @functools.wraps(function)
    def contextmanager_impl(*args, **kwargs):
        class contextmanager_impl_(object):
            def __init__(self):
                self.gen = function(*args, **kwargs)
                self.it = None

antvconst

import functools


class classmethod(object):
    def __init__(self, f):
        self.f = f

    def __get__(self, owner, owner_type):
        @functools.wraps(self.f)
        def wrapper(*args, **kwargs):

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