python-分别在1个列表中反转2个字符串？

Question

In python, I have this list containing

['HELLO', 'WORLD']

how do I turn that list into

['OLLEH', 'DLROW'] 

Answer 1

>>> words = ['HELLO', 'WORLD']
>>> [word[::-1] for word in words]
['OLLEH', 'DLROW']

Answer 2

使用列表理解：

reversed_list = [x[::-1] for x in old_list]

Answer 3

Arguably using the builtin reversed is more clear than slice notation x[::-1] .

[reversed(word) for word in words]

or

map(reversed, words)

Map is fast without the lambda.

I just wish it was easier to get the string out of the resulting iterator. Is there anything better than ''.join() to put together the string from the iterator?

Answer 4

Using map and lambda (lambdas are slow):

>>> lis=['HELLO', 'WORLD']
>>> map(lambda x:x[::-1],lis)
['OLLEH', 'DLROW']