如何删除列表中字符串中的所有空格

Question

我的清单是这样的，

mylist=[ " ","abc","bgt","llko","    ","hhyt","  ","      ","iuyt"]

如何删除此列表中包含字符串的所有空格？

Answer 1

您可以使用list comprehension：

 new_list = [elem for elem in mylist if elem.strip()]

使用strip()可以保证甚至只删除包含多个空格的字符串。

Answer 2

将filter与未绑定的方法 str.strip一起使用。

Python 2.x

>>> mylist=[ " ","abc","bgt","llko"," ","hhyt"," "," ","iuyt"]
>>> filter(str.strip, mylist)
['abc', 'bgt', 'llko', 'hhyt', 'iuyt']

Python 3.x

>>> mylist=[ " ","abc","bgt","llko"," ","hhyt"," "," ","iuyt"]
>>> list(filter(str.strip, mylist))
['abc', 'bgt', 'llko', 'hhyt', 'iuyt']

Answer 3

只需使用None过滤器。

filter(None, mylist)

如果空字符串表示只包含空格字符的字符串，则应使用：

filter(str.strip, mylist)

示例：

>>> filter(None, ['', 'abc', 'bgt', 'llko', '', 'hhyt', '', '', 'iuyt'])
['abc', 'bgt', 'llko', 'hhyt', 'iuyt']
>>> filter(str.strip, [' ', 'abc', 'bgt', 'llko', ' ', 'hhyt', ' ', ' ', 'iuyt'])
['abc', 'bgt', 'llko', 'hhyt', 'iuyt']

Answer 4

尝试使用filter(lambda x: x.strip(), mylist)：

>>> mylist=[ " ","abc","bgt","llko"," ","hhyt"," "," ","iuyt"]
>>>
>>> filter(lambda x: x.strip(), mylist)
['abc', 'bgt', 'llko', 'hhyt', 'iuyt']
>>>
>>> mylist=[ " ","abc","bgt","llko","    ","hhyt","  ","      ","iuyt"]
>>>
>>> filter(lambda x: x.strip(), mylist)
['abc', 'bgt', 'llko', 'hhyt', 'iuyt']
>>>

Answer 5

mylist = [x for x in [ " ","abc","bgt","llko"," ","hhyt"," "," ","iuyt"] if x]

...使用“if”子句列出理解，在这种情况下，依赖于Python认为空字符串（和空容器）在布尔上下文中为“False”这一事实。

如果“空”表示零长度或仅包含空格，则可以将if子句更改为if x.strip()

Answer 6

我会这样做：

>>> mylist=[ " ","abc","bgt","llko"," ","hhyt"," "," ","iuyt"]
>>> new_list = [e for e in mylist if len(e.strip())!=0]
>>> new_list
      ['abc', 'bgt', 'llko', 'hhyt', 'iuyt']

Answer 7

方法isalpha（）检查字符串是否仅由字母字符组成：

mylist=[ " ","abc","bgt","llko"," ","hhyt"," "," ","iuyt"] 
mylist = [word for word in mylist if word.isalpha()]
print mylist

Output:['abc', 'bgt', 'llko', 'hhyt', 'iuyt']

Answer 8

mylist = [s for s in mylist if str is not " "]

Answer 9

list = ["first", "", "second"]
[x for x in list if x]

输出：['first'，'second']

按照建议缩短，下面给出了同样的问题

Remove empty strings from a list of strings

Answer 10

>>> mylist=[ " ","abc","bgt","llko"," ","hhyt"," "," ","iuyt"]
>>> [i for i in mylist if i.strip() != '']
['abc', 'bgt', 'llko', 'hhyt', 'iuyt']