字典的使用

{}使用大括号定义

dicts =

print(dicts['hello'])

dict函数定义

dic = dict([['hello','world']])

print(dic)

dict函数下fromkey函数定义,批量生成字典的键值，同时去除相同的键

dic = dict.fromkeys(['a','a','b','c'],['a'])

print(dic)

字典的增加

方法一

dicts['city'] = '贵州'

print(dicts)

方法二

dicts.update({'city':'贵州'})

print(dicts)

字典删除

pop函数弹出键的值

data = dicts.pop('nihao')

print(dicts,data)

del删除键的值

del dicts['nihao']

print(dicts)

字典修改

dicts['nihao'] = 'shijie'

print(dicts)

字典查询

取所有的键,值

print(list(dicts.keys()),dicts.values())

item取键,值

for key,values in dicts.items():

print(key,values)

循环遍历取键值

for i in dicts:

print(i,dicts[i])