关于python：如何删除列表中字符串中的所有空格


How to remove all spaces in the strings in list

我的名单是这样的，

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

如何删除此列表中包含字符串的所有空格？

相关讨论

您可以使用列表理解：

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

使用strip()可以保证即使只包含多个空格的字符串也将被删除。

相关讨论

使用filter与未绑定方法str.strip结合使用。

Python 2 x

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

Python 3 x

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

只需使用带None的过滤器。

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filter(None, mylist)

如果空字符串是指只包含空格字符的字符串，则应使用：

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filter(str.strip, mylist)

实例：

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>>> 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']
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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，依赖于这样一个事实：在布尔上下文中，Python认为空字符串(和空容器)是"false"。

如果"空"的意思是零长度或只包含空格，则可以将if子句改为读if x.strip()。

尽量使用filter(lambda x: x.strip(), mylist)：

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>>> 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']
>>>

方法isalpha()检查字符串是否仅由字母字符组成：

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

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

我会这样做：

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

输出：''first'、'second']

按建议缩短，下面给出相同的问题

从字符串列表中删除空字符串

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