016 Python语法之推导式

推导式

特性

1. 好好应用推导式后面的条件判断

列表推导式

list1 = [i for i in range(10) if not(i%2) and i % 3]
list1 = [2, 4, 8]

字典推导式

dict1 = {i:i % 2==0 for i in range(10)}
dict1 = {0: True, 1: False, 2: True, 3: False, 4: True, 5: False, 6: True, 7: False, 8: True, 9: False}

集合推导式

set1 = {i for i in [1,1,2,2,3,4,5,6,7,8]}
set1 = {1,2,3,4,5,6,7,8}

生成器推导式

d = (i for i in range(100))
可以用next迭代
也可以用for迭代
for each in d:
    print(each)