python中is和==的区别以及全字段取出key和value

a = 1  # a为int类型
b = 1  # b为int类型
print(a is b)
print(a == b)
print(id(a))
print(id(b))

a = 'china'  # a为str类型
b = 'china'  # b为str类型
print(a is b)
print(a == b)
print(id(a))
print(id(b))

a = (1, 2, 3)  # a为tuple类型
b = (1, 2, 3)  # b为tuple类型
print(a is b)
print(a == b)
print(id(a))
print(id(b))

a = [1, 2, 3]  # a为list类型
b = [1, 2, 3]  # b为list类型
print(a is b)
print(a == b)
print(id(a))
print(id(b))

a = {'cheese': 1, 'zh': 2}  # a为dict类型
b = {'cheese': 1, 'zh': 2}  # b为dict类型
print(a is b)
print(a == b)
print(id(a))
print(id(b))

c = [1, 2, 3]
d = [1, 2, 3]
a = set(c)  # a为set类型
b = set(d)  # b为set类型
print(a is b)
print(a == b)
print(id(a))
print(id(b))
只有int、str类型的情况下，a is b才为True，id也相等，当a和b是list、tuple、dict或set型时，a is b为False，id不相等，is是对比地址，==是对比值

# 取出全部的key和value

dic = {
    'name': '张波',
    'age': 38,
    'address': '国贸',
    'phone': 13800138000,
    'mail': '13800138000@qq.com',
    'other': {
        'interest': 'swimming',
        'country': 'China',
        'car': '北京奔驰'
    }

}

keys = []
values = []


def get_kv(sh):
    for k, v in sh.items():
        if type(v) != dict:
            keys.append(k)
            values.append(v)
        elif type(v) == dict:
            for i, j in v.items():
                keys.append(i)
                values.append(j)

    print('所有的key是：%s
所有的value是：%s' % (keys, values))


get_kv(dic)