用单个空格替换字符串中的多行距 - Python

问题描述

循环遍历字符串和用单个空格替换双空格的开销太长了.尝试用单个空格替换字符串中的多个间距是一种更快的方法吗?

The overhead in looping through the string and replacing double spaces with single ones is taking too much time. Is a faster way of trying to replace multi spacing in strings with a single whitespace?

我一直在这样做，但它太长而且太浪费了:

I've been doing it like this, but it's just way too long and wasteful:

str1 = "This is    a  foo bar   sentence with  crazy spaces that  irritates   my program "

def despace(sentence):
  while "  " in sentence:
    sentence = sentence.replace("  "," ")
  return sentence

print despace(str1)

推荐答案

看看这个

In [1]: str1 = "This is    a  foo bar   sentence with  crazy spaces that  irritates   my program "

In [2]: ' '.join(str1.split())
Out[2]: 'This is a foo bar sentence with crazy spaces that irritates my program'

方法 split() 返回字符串中所有单词的列表，使用 str 作为分隔符(如果未指定，则拆分所有空格)

The method split() returns a list of all the words in the string, using str as the separator (splits on all whitespace if left unspecified)

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