python列表推导式

• • 列表推导式
  • 字典推导式

## 嵌套列表推导式
a = [[1,3],[4,5],[6,6],[7,8],[9,4]]
b = [_b for _a in a for _b in _a]
# 判断式 列表推导式
f = [2,3,4,5,9,4,6,4]
c = [_ for _ in a if _>5]

## 嵌套字典推导式
adict = {"name":{"_name":"张三","page":120},"length":{"size":"20"}}
bdict = { key+"::"_key :_val for key,val in adict.items() for _key,_val in val.items()}