open live writer 编辑博客

1 #例:找到嵌套列表中名字含有两个‘e’的所有名字
2 names = [[‘Tom‘, ‘Billy‘, ‘Jefferson‘, ‘Andrew‘, ‘Wesley‘, ‘Steven‘, ‘Joe‘],
3          [‘Alice‘, ‘Jill‘, ‘Ana‘, ‘Wendy‘, ‘Jennifer‘, ‘Sherry‘, ‘Eva‘]]
4 
5 print([name for lst in names for name in lst if name.count(‘e‘) >= 2])  # 注意遍历顺序，这是实现的关键

#例:找到嵌套列表中名字含有两个‘e’的所有名字
names = [[‘Tom‘, ‘Billy‘, ‘Jefferson‘, ‘Andrew‘, ‘Wesley‘, ‘Steven‘, ‘Joe‘],
         [‘Alice‘, ‘Jill‘, ‘Ana‘, ‘Wendy‘, ‘Jennifer‘, ‘Sherry‘, ‘Eva‘]]

print([name for lst in names for name in lst if name.count(‘e‘) >= 2])  # 注意遍历顺序，这是实现的关键