Python中，從子列表

Question

刪除所有數字，我有以下列表：[['F', 'G', 'C'], ['S', 3, 7], ['C', 3, 'D']]（由3子表）

但我想有：[['F', 'G', 'C'], ['S'], ['C', 'D']]

我怎麼會去這樣做呢？

Answer 1

使用列表理解：

my_list = [['F', 'G', 'C'], ['S', 3, 7], ['C', 3, 'D']] 
no_numbers = [[item for item in sub_list if not isinstance(item, int)] 
       for sub_list in my_list] 
print(no_numbers) 

此打印：

[['F', 'G', 'C'], ['S'], ['C', 'D']] 

Answer 2

mylist = [['F', 'G', 'C'], ['S', 3, 7], ['C', 3, 'D']] 
newlist = [[x for x in mysublist if not isinstance(x, int)] for mysublist in mylist] 
print newlist 

有多種方式來達致這。上面的例子是使用列表理解。

Answer 3

這是Python 3中的代碼：

mylist = [['F','G','C'], ['S',3,7], ['C',3,'D']] 
rslist = [[y for y in x if not isinstance(y, int)] for x in mylist ] 
print (rslist)