def is_subdict(dict1, dict2):
'''tell whether dict2 is a part of dict1
判断字典dict2是否为dict1的子集
>>> is_subdict({'a': 1, 'b': 2}, {'a': 1})
True
>>> is_subdict({'a': 1, 'b': 2}, {'c': 3})
False
'''
d = dict(dict1, **dict2)
return d == dict1
if __name__ == '__main__':
import doctest
doctest.testmod()