day14 Python集合关系运算交，差，并集

low逼写法，没用集合

python_1 = ['charon','pluto','ran']

linux_1 = ['ran','xuexue','ting']

python_and_linux = []

for p_name in python_1:

    if p_name in linux_1:

        python_and_linux.append(p_name)

print(python_and_linux)

结果：

['ran']

高级点写法用集合了

python_1 = ['charon','pluto','ran','charon']

linux_1 = ['ran','xuexue','ting']

p_s = set(python_1)

l_s = set(linux_1)

print(p_s,l_s)

#交集

print(p_s.intersection(l_s))

print(p_s&l_s)

#并集

print(p_s.union(l_s))

print(p_s|l_s)

#差集

print(p_s.difference(l_s))

print(p_s - l_s)

print(l_s.difference(p_s))

print(l_s - p_s)

结果：

{'charon', 'ran', 'pluto'} {'ting', 'xuexue', 'ran'}

{'ran'}

{'ran'}

{'ting', 'charon', 'xuexue', 'ran', 'pluto'}

{'ting', 'charon', 'xuexue', 'ran', 'pluto'}

{'charon', 'pluto'}

{'charon', 'pluto'}

{'ting', 'xuexue'}

{'ting', 'xuexue'}