Nrthugu

Suppose such a markdown file

In [86]: !cat formatCase.md                                                                                       



Some content in the head



```

>>> '{:20,.2f}'.format(18446744073709551616.0)

'18,446,744,073,709,551,616.00'

```



When formatting an integer, include the comma after the width:



```

>>> '{:20,d}'.format(18446744073709551616)

'18,446,744,073,709,551,616'

```



some content on the foot.

I'd like to add language type to ```

In [88]: c = open("new_format.md").read()



new_c = re.sub(r"```([^`]+)```", r"```python1```",c)

This solution works,

One more step, if there exist situation to make typo error inside ```, one ` or two `` occurs,

then, should replace [^`] with ^(```).

tried alternatively

r"```(^(```))+```"

r"```(?:^(?:```))+```"

r"```((?:^(?:```))+)```"

It does not perform correctly.

How could get it done to consider ^(```) situation.

You may use

r'```([^`]*(?:``?(?!`)[^`]*)*)```'

See the regex demo

Details

• 
  ``` - 3 backticks


• 
  ([^`]*(?:``?(?!`)[^`]*)*) - Group 1:
  
  
  
  
  • 
    [^`]* - 0+ chars other than backtick
  
  
  • 
    (?:``?(?!`)[^`]*)* - zero or more repetitions of
    
    
    
    
    • 
      ``?(?!`) - 1 or 2 backticks not followed with another backtick
    
    
    • 
      [^`]* - 0+ chars other than backtick
    
    
    
    
  
  
  
  


• 
  ``` - 3 backticks