零基础学python之iterator迭代器全解

1、from collections import Iterable, Iterator

2、from collections import Iterable, Iterator  # 引入相关包# 判断是否是可迭代对象print(isinstance(1, Iterable))print(isinstance('good', Iterable))print(isinstance(range(5), Iterable))print(isinstance([1, 2, 3], Iterable))print(isinstance({1: 11, 2: 22}, Iterable))

3、print('*******列表成生式*******')L = list(range(1, 10))print(L)

4、列表生成式相当于：

L = []for i in range(1, 10):    L.append(i)print(L)L = [i for i in range(1, 10)]print(L)

5、print('****做运算*****')L = []for i in range(5):    L.append('%d%s' % (i+1, chr(ord('M')+i)))print(L)

6、L = ['%d%s' % (i+1, chr(ord('M')+i)) for i in range(5)]print(L)