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Python 两个列表的差集、并集和交集实现代码

更新时间:2020-04-24 04:00:01 作者:startmvc
①差集方法一:if__name__=='__main__':a_list=[{'a':1},{'b':2},{'c':3},{'d':4},{'e':5}]b_list=[{'a':1},{'b':2}]ret_

①差集 方法一:


if __name__ == '__main__':
	a_list = [{'a' : 1}, {'b' : 2}, {'c' : 3}, {'d' : 4}, {'e' : 5}]
	b_list = [{'a' : 1}, {'b' : 2}]
	ret_list = []
	for item in a_list:
 if item not in b_list:
 ret_list.append(item)
	for item in b_list:
 if item not in a_list:
 ret_list.append(item)
	print(ret_list)

执行结果:

方法二:


if __name__ == '__main__':
	a_list = [{'a' : 1}, {'b' : 2}, {'c' : 3}, {'d' : 4}, {'e' : 5}]
	b_list = [{'a' : 1}, {'b' : 2}]
	ret_list = [item for item in a_list if item not in b_list] + [item for item in b_list if item not in a_list]
	print(ret_list)

执行结果:

方法三:


if __name__ == '__main__':
	a_list = [1, 2, 3, 4, 5]
	b_list = [1, 4, 5]
	ret_list = list(set(a_list)^set(b_list))
	print(ret_list)

执行结果:

注:此方法中,两个list中的元素不能为字典

②并集


if __name__ == '__main__':
	a_list = [1, 2, 3, 4, 5]
	b_list = [1, 4, 5]
	ret_list = list(set(a_list).union(set(b_list)))
	print(ret_list)

执行结果:

注:此方法中,两个list中的元素不能为字典

③交集


if __name__ == '__main__':
	a_list = [1, 2, 3, 4, 5]
	b_list = [1, 4, 5]
	ret_list = list((set(a_list).union(set(b_list)))^(set(a_list)^set(b_list)))
	print(ret_list)

执行结果:

注:此方法中,两个list中的元素不能为字典

Python 差集 Python并集 Python交集