「python」遍历

遍历

通过for ... in ...:的语法结构，我们可以遍历字符串、列表、元组、字典等数据结构。

注意python语法的缩进

字符串遍历

>>> a_str = "hello itcast">>> for char in a_str:...     print(char,end=' ')...h e l l o   i t c a s t

列表遍历

>>> a_list = [1, 2, 3, 4, 5]>>> for num in a_list:...     print(num,end=' ')...1 2 3 4 5

元组遍历

>>> a_turple = (1, 2, 3, 4, 5)>>> for num in a_turple:...     print(num,end=" ")1 2 3 4 5

enumerate()

>>> chars = ['a', 'b', 'c', 'd']>>> for i, chr in enumerate(chars):...     print i, chr...0 a1 b2 c3 d