Question

我想删除该字符串中的所有多余空行并将其存储在其他字符串中，必须保留单个空行。

mystring1 = """This is line 1


            This is line 2
            This is line 3



            This is line 4

            This is line 5"""

所需的输出：

mystring2 = """This is line 1

            This is line 2
            This is line 3

            This is line 4

            This is line 5"""

Answer 1

使用re捕获两个或更多空白行：

print(re.sub("\n\n+", "\n\n", mystring1))
This is line 1

This is line 2
This is line 3

This is line 4

This is line 5

Answer 2

您可以使用re并用\ n \ n替换2行或更多行：

mystring1 = """This is line 1


This is line2
This is line3



This is line4

This is line5
"""

import re
mystring2 = re.sub(r'\n{2,}', '\n\n', mystring1)

mystring2
This is line 1

This is line2
This is line3

This is line4

This is line5

Answer 3

如果这是所需的输出，请使用re.sub("\n{2,}", "\n\n", mystring1)：

>>> mystring1 = """This is line 1


            This is line 2
            This is line 3



            This is line 4

            This is line 5"""
>>> mystring2 = re.sub("\n{2,}", "\n\n", mystring1)
>>> print(mystring2)
This is line 1

            This is line 2
            This is line 3

            This is line 4

            This is line 5

如果要删除除换行符以外的所有多余换行符，可以像这样使用``：

>>> mystring2 = re.sub("\n+", "\n", mystring1)
>>> print(mystring2)
This is line 1
            This is line 2
            This is line 3
            This is line 4
            This is line 5

Answer 4

解决方案：

import os
mystring1 = """This is line 1


            This is line 2
            This is line 3



            This is line 4

            This is line 5"""

mystring1 = os.linesep.join([s for s in mystring1.splitlines() if s])

print(mystring1)

输出：

This is line 1
This is line 2
This is line 3
This is line 4
This is line 5

如何删除多余的空白行

4 个答案: