CODEWITHSUNDEEP
pythonregexsubstitution
Amir Amf
Amir Amf

Reputation: 45

How to replace a single slash '/' in a string excluding the slash characters in the '://' pattern

I am trying to find a way to replace single slash character '/' from a string except the slashes in 'https://' or not in 'http://'

a="https://example.com/example/page/"

I would like to substitute '/' for example with '%' but not the slash characters in 'https://' or not in 'http://' so that at the end I have the result like:

a="https://example.com%example%page%"

I tried

re.sub('(?<!:\/)\/', '%', a)

in python but it is not correct.

Upvotes: 2

Views: 62

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626758

You may use

re.sub(r'(https?|ftps?)://|/', lambda x: x.group(0) if x.group(1) else '%', s)

Details

  • (https?|ftps?):// - matches and captures into Group 1 http/https/ftp/ftps (add more if needed) and then matches ://
  • | - or
  • / - matches / in any other context

If Group 1 is matched, the whole match is pasted back, else, the / is replaced with %.

See the Python demo:

import re
s = 'https://example.com/example/page/'
print(re.sub(r'(https?|ftps?)://|/', lambda x: x.group(0) if x.group(1) else '%', s))
# => https://example.com%example%page%

Upvotes: 2

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