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  1. import re
  2.  
  3. code = r"""
  4.     print(",  ,",  "l")   # comment  spaces
  5.     print(",  ,",  "l")   # comment  spaces
  6. """
  7.  
  8. print(re.sub(r"""
  9.       [Rr]("(?!"")|'(?!'')|"{3}|'{3}).*?\1          # Raw strings
  10.     | ("(?!"")|'(?!'')|"{3}|'{3})(?:\\.|[^\\])*?\2  # Normal strings
  11.     | [ \t]*\#[^\r\n]*                              # Comments
  12.     | ^[ \t]+                                       # Leading whitespace
  13.     | [ \t]+$                                       # Trailing whitespace
  14.     | ([ \t]{2,})                                   # Duplicate whitespace
  15. """,
  16. lambda m: m.group(0) if m.group(3) is None else ' ',
  17. code,
  18. flags = re.VERBOSE | re.DOTALL | re.MULTILINE))
  19.  
Success #stdin #stdout 0.11s 10096KB
comments (?)
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Standard input is empty
stdout
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    print(",  ,", "l")   # comment  spaces
    print(",  ,", "l")   # comment  spaces
https://ideone.com/3ouQee
language:
Python 3 (python  3.9.5)
created:
10 years ago
visibility:
public

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