如何从元组列表中的元组中删除

Question

I have a list of tuples like this

[
  ('px', Timestamp('2017-07-01 00:00:00')),
  ('px', Timestamp('2017-08-01 00:00:00')),  
  ('px', Timestamp('2017-09-01 00:00:00')),  
  ('px', Timestamp('2017-10-01 00:00:00')),  
  ('px', Timestamp('2017-11-01 00:00:00'))
]

and want to remove the 'px' keeping only the timestamps as a tuple.

Answer 1

You can slice off the first items in a list comprehension :

new_lst = [x[1:] for x in lst]

The tuple slice gives you a new tuple, with the items at index 0 removed.

Answer 2

您还可以使用list comprehension推导来解压缩数据：

final = [(v,) for _, v in yourlist]