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I have a string here 'Let $[C | d]$ be $Star$'.

How to replace $..$ within the above string with \(...\).

The result should be 'Let \([C | d]\) be \(Star\)'.

How can I do it python.

I have tried as

import re
x = 'Let $[C | d]$ be $Star$'
y = re.sub(r'\$.*?\$', r'\\(.*?\\)', x)

but not working.

the output was 'Let \(.?\) be \(.?\)'

Ref : Regular Expression to find a string included between two characters while EXCLUDING the delimiters

Vinod
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1 Answers1

1

It should work, here is the working example.

import re

string = 'Let $[C | d]$ be $Star$'

result = re.sub(r'\$(.*?)\$', r'\\(\1\\)', string)

print(result)

Explanation :

re.sub: This is the function provided by the re module in Python for performing regular expression substitution.
r'\$(.*?)\$': This is the regular expression pattern used for matching the desired pattern of $..$ in the string.

  • \: This is an escape character that ensures the following $ symbols are treated as literal characters, not as special characters in the regular expression.
  • \$(.*?)\$: This captures the content between the $ symbols as a group. The .*? is a non-greedy match that captures any characters (except newline characters) between the $ symbols, but as few as possible.

r'(\1)': This is the replacement pattern for the matched pattern.

  • (\1): This uses a backreference to refer to the first captured group in the pattern. In this case, it refers to the content captured between the $ symbols. By surrounding \1 with parentheses, we specify that the replacement should have the format (...), capturing the content of the first group.
Debug Diva
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