python在方括号[]中使用for循环的两种方式,列表解析List Comprehensions,类似[0 for i in range(10)]

两种语法:

  • [expression for iter_val in iterable]
  • [expression for iter_val in iterable if cond_expr]

举例说明:

1、[expression for iter_val in iterable]

传统写法:

L = []
for i in range(1,11):
    L.append(i**2)
print(L)

输出:
[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]
列表解析:

L = [i**2 for i in range(1,11)]
print(L)

输出:
[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

2、[expression for iter_val in iterable if cond_expr]

传统写法:

L = []
for i in range(1,11):
    if i**2 > 50:
        L.append(i**2)
print(L)

输出:
[64, 81, 100]
列表解析:

L = [i**2 for i in range(1,11) if i**2 >50]
print(L)

输出:
[64, 81, 100]

你可能感兴趣的:(python)