python 字典增删改查

dicts = {1:123,(1,2,3,4):456,'hello':'world',123:[1,23]}
# 查
# print(dicts[(1,2,3,4)])
# 取字典的键
# print(list(dicts.keys()))
# 取字典的值
# print(dicts.values())
# 判断某元素是否是字典的键
# if 2 in dicts:
# print(123)
# 方法一：
# for i in dicts:
# print(i,dicts[i])
# 方法二
# for a,b in dicts.items():
# print(a,b)

# 增
# 方法一
# dicts['nihao'] = 12345
# print(dicts)
# 方法二
# dicts.update({'nihao':12345})
# print(dicts)

# 修改
# dicts['hello'] = '6666'
# print(dicts)

# 删除
# 方法一
# a = dicts.pop('hello')
# print(a)
# print(dicts)
# 方法二
# del dicts['hello']
# print(dicts)