Clash Royale CLAN TAG#URR8PPP

Replace substring in python with matched after modify

I'm trying in python to replace substring in python with matched after modify it.
i have #maZ and expect to replace it by #maZ.

re.sub(t=r'#w',t - 1 , line)


Thank you.

2 Answers
2

You don't need Regex for this, str.replace to replace and with null string would do:

str.replace

In [855]: str_ = '#maZ'

In [856]: str_.replace('', '').replace('', '')
Out[856]: '#maZ'


If you insist on using Regex, use a character class for and , and again replace with null string:

In [857]: re.sub(r'[]', '', str_)
Out[857]: '#maZ'


Edit based on comment:

As you actually want to remove the braces around Q in <math>\mathbbQ, you can use w+ to match one or more of alphanumerics or underscore and put the match in a captured group to refer it in the replacement with re.sub:

Q

<math>\mathbbQ

w+

re.sub

In [858]: str_ = '<math>\mathbbQ'

In [859]: re.sub(r'(w+)', r'1', str_)
Out[859]: '<math>\mathbbQ'


x01

If you have patterns like Q,Z,E it might be an option to use a character class [EQZ] or a specify a range to capture those in a group between curly braces and the replace with the capturing group:

[EQZ]

([EQZ])

([EQZ])

import re
line = "#maZ"
result = re.sub(r"([EQZ])", r"1", line)

if result:
print (result)


Demo

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.