python - 从字符串中删除多个字符序列

Question

如果我有一个像这样的字符串:

my_string = 'this is is is is a string'

如何删除多个 is 以便只显示一个？

该字符串可以包含任意数量的 is，例如

my_string = 'this is is a string'
other_string = 'this is is is is is is is is a string'

我想正则表达式解决方案是可能的，但我不知道如何去做。谢谢。

Answer 1

您可以使用itertools.groupby

from itertools import groupby
a = 'this is is is is a a a string string a a a'
print ' '.join(word for word, _ in groupby(a.split(' ')))