regular expression

[Pierre]

Hello,

I would like to change the string "(1 and (2 or 3))" by "(x[1] & (x
[2] || x[3]))" using regular expression...
Anyone can help me ?

Thanks.

 

[Steven D'Aprano]

Hello,

I would like to change the string "(1 and (2 or 3))" by "(x[1] & (x
[2] || x[3]))" using regular expression... Anyone can help me ?

Do you mean you want to change the string into "(x[1] & (x[2] || x[3]))" ?

Does it have to be using regular expressions? Would this be good enough?

.... s = s.replace(c, 'x[%s]'%c)
....'(x[1] & (x[2] || x[3]))'

 

[Peter Otten]

I would like to change the string "(1 and (2 or 3))" by "(x[1] & (x
[2] || x[3]))" using regular expression...
Anyone can help me ?

re.compile(r"(\d+)").sub(r"x[\1]", "(1 and (2 or 3))") '(x[1] and (x[2] or x[3]))'
re.compile("and|or").sub(lambda m, d={"and":"&", "or":"||"}:

d[m.group()], _)
'(x[1] & (x[2] || x[3]))'

Peter