合并三个单引号之间的行，然后将起始引号替换为“#”

Question

'''
Created on Mar 11, 2017

@author: XXZ
This file is to demonstrate the word frequency counter. This is a very 
important practical

'''

所需输出：

#Created on Mar 11, 2017 @author: XXZ This file is to demonstrate the word frequency counter. This is a very important practical

（我想把它算作评论）

我的代码： 进口re

START_PATTERN = "'''\n"
END_PATTERN = "'''\n"

with open('counter.py') as file:
    match = False
    newfile = None
for line in file:
    if re.match(START_PATTERN, line):
        match = True
        newfile = open('my_new_file.txt', 'w')
        continue
    elif re.match(END_PATTERN, line):
        match = False
        newfile.close()
        continue
    elif match:
        newfile.write(line)
        newfile.write('\n')

这只是在文件中写入最后一条多行注释。不是全部

Answer 1

用替换\n。以下是代码：

a = '''
Created on Mar 11, 2017

@author: XXZ
This file is to demonstrate the word frequency counter. This is a very 
important practical

'''

print("#"+a.replace("\n"," "))

输出：

# Created on Mar 11, 2017  @author: XXZ This file is to demonstrate the word frequency counter. This is a very  important practical  

Answer 2

您可以在中读取整个文件，并在多行模式下应用re.sub。 之后（或之前，不要紧……）只需裁剪这三个'并添加#：

import re
with open('test.py', 'r') as f:
    txt = f.read()
    print('IN:\n', txt)
    txt = re.sub('\n', ' ', txt, flags=re.MULTILINE)
    txt = '#' + txt[3:-3]
    print('\nOUT:\n',txt)


IN:
 '''
Created on Mar 11, 2017

@author: XXZ
This file is to demonstrate the word frequency counter. This is a very 
important practical

'''

OUT:
 # Created on Mar 11, 2017  @author: XXZ This file is to demonstrate the word frequency counter. This is a very  important practical  

Answer 3

可以使用re.sub将一个或多个新行（\n）替换为单数空格。然后去掉结果（任何尾随空格和前导空格）并将其连接到'#'：

import re
'#' + re.sub('\n+',' ',s).strip()
#'#Created on Mar 11, 2017 @author: XXZ This file is to demonstrate the word frequency counter. This is a very  important practical'