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math = {'xm','xh','xg','xx'} english ={'xm','xh','dm','john'} print(math.symmetric_difference(english))
运行结果:
{'dm', 'john', 'xx', 'xg'} process finished with exit code 0
math = {'xm','xh','xg','xx'} english ={'xd','xb','dm','john'} print(math.isdisjoint(english))
运行结果:
true process finished with exit code 0
math = {'xm','xh','xg','xx'} english ={'xd','xb','dm','john'} print(math.issubset(english))
运行结果:
false (因为不是,所以返回false) process finished with exit code 0
math = {'xm','xh','xg','xx'} english ={'xd','xb','dm','john'} math.update(english) print(math)
运算结果:
{'xm', 'xh', 'john', 'xb', 'xd', 'dm', 'xx', 'xg'} process finished with exit code 0
ps:不可变集合
s = frozenset('hello') print(s)
运行结果:
frozenset({'e', 'l', 'h', 'o'}) process finished with exit code 0
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