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(
1