Merge the lines between triple single quotes and then replace the starting quote with '#'

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

Required Output:

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

(I want to count it as a comment)

My Code:
import 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')

This just writes the last multilines comment in the file. Not all.

What have you tried, and what are you stuck on?
– John Kugelman
Aug 30 at 12:13

Why is the output expecting a split before the word frequency counter?
– Sayse
Aug 30 at 12:16

Its not split, its supposed to be all in the same line.
– nehaj
Aug 30 at 12:17

Why do you want to do this? Unlike docstrings, comments aren't available to help etc.
– jonrsharpe
Aug 30 at 12:26

help

They aren't just comments. They're docstrings. Maybe adding some real context to the question would help?
– jonrsharpe
Aug 30 at 14:01

4 Answers
4

You can read the whole file in and apply an re.sub in multiline mode.
Afterwards (or before, doesn't mater...) just crop those three ' and add #:

re.sub

'

#

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

Thanks it worked. Can you explain the "flags = re.MULTILINE"
– nehaj
Aug 30 at 12:36

Normally re works on a line by line base, so you just can't match newlines. This mode makes re handle the complete text as one block. See also docs.python.org/3/library/re.html#re.MULTILINE
– SpghttCd
Aug 30 at 12:38

re

You can use re.sub to replace one or more new-lines (n) with a singular space. Then strip the result (of any trailing and leading spaces) and concatenate that onto a '#':

re.sub

n

'#'

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'

Correct, even if I'd replace 'n' by 's', so that two lines do not stick too close together...
– SpghttCd
Aug 30 at 12:15

'n'

's'

@SpghttCd My bad, I will update to use a regex
– Joe Iddon
Aug 30 at 12:23

It doesn't concatenate the lines in one line.
– nehaj
Aug 30 at 12:25

@nehaj see the answer now; is it not exactly the same as your desired?
– Joe Iddon
Aug 30 at 12:26

it puts the '#' in front of each line. But doesn't concatenate the lines into one.
– nehaj
Aug 30 at 12:29

Replace n with . Here is a code:

n

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"," "))

Output:

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

Using str.join

str.join

Ex:

s = ''' Created on Mar 11, 2017 @author: XXZ This file is to demonstrate the word frequency counter. This is a very important practical ''' print("# "+ " ".join(i.strip() for i in s.split()) )

Output:

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

Required, but never shown

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