Python3_dict

1.标准的写法

dic = {"K1":"V1","K2":"V2"}
dic2 = dict(K1="V1",K2="V2")
print(type(dic))
print(type(dic2))

2.get和正常的去键值一样，只是当键值不存在时则默认返回None&或者返回指定值

zidian = {"K1":"v1","K2":"v2"}
print(zidian["K1"])
print(zidian["K2"])
print(zidian.get("K3","qiuwenbin"))

结果：

v1
v2
qiuwenbin

3.pop 拿走字典中的键值------由于字典是无序的，所以pop后的参数是必须的。

zidian = {"K1":"v1","K2":"v2"}
print(zidian.pop("K1"))
print(zidian)