如何从列表中的字符串中删除字符？

Question

I am working with a module called PyDictionary . Whenever it gets the synonym of a word, it creates a list of the synonyms, however when I try print the list , it has a 'u' before the synonym, example:

[u'welcome', u'howdy', u'hi', u'greetings', u'bonjour']

I've tried: synonym = re.sub('u','',synonym[0]) , and this works, but only prints 'welcome' , not the entire list .

Any help would be greatly appreciated. Thanks!

Answer 1

如果要将list转换为strings list ，可以使用list推导，例如：

result = [str(x) for x in synonym]

Answer 2

The u you are seeing is not part of the string content, and therefore cannot be removed with regular expression substitution. Instead, it should be considered part of the opening quote . The syntax of the Python language itself allows for string literals to be defined with quotes that are inflected in this way. For example:

a = 'spam'
b = u'spam'   # in Python 2, a and b are different types

When you display the variable the way you would to a programmer , ie in such a way that the quote characters are visible (eg just typing synonym[0] at the prompt, or trying to print the whole list synonym , or otherwise invoking Python's repr() mechanism on the strings) then the u will be visible too. By contrast, when you display the variable as you would to a user (eg with print synonym[0] , or by join ing the list and then print ing the resulting string) then, just as you would not expect to see the quote characters themselves, you will also not see the u .