python集合set，交集，并集，差集，对称差集，子集和超集

x = {1, 2, 3, 4}

y = {2, 4, 5, 6}

# 交集(取x中与y中相同部分)

print(x.intersection(y))

print(x & y)

# 并集(去重合并)

print(x.union(y))

print(x | y)

# 差集(x在y中不同部分，相反)

print(x.difference(y)) # {1, 3}

print(y.difference(x)) # {5,6}

print(x - y)

print(y - x)

# 补(对称差集) 两个分别差集之后合并为一个集合

print(x.symmetric_difference(y))

print(y.symmetric_difference(x))

print(x ^ y)

print(y ^ x)

# 子集和超集 :超集长的中包含短的。子集，短的在长的中

print(x.issubset(y))

print(y.issuperset(x))

结果请对号入座：

x.intersection(y):{2, 4}

x & y:{2, 4}

x.union(y):{1, 2, 3, 4, 5, 6}

x | y:{1, 2, 3, 4, 5, 6}

x.difference(y):{1, 3}

y.difference(x):{5, 6}

x - y:{1, 3}

y - x:{5, 6}

x.symmetric_difference(y):{1, 3, 5, 6}

y.symmetric_difference(x):{1, 3, 5, 6}

x ^ y:{1, 3, 5, 6}

y ^ x:{1, 3, 5, 6}

x.issubset(y):False

y.issuperset(x):False