Question

I’ve got a string looks like this

ABC(a =2,b=3,c=5,d=5,e=Something)

I want the result to be like

ABC(a =2,b=3,c=5)

What’s the best way to do this? I prefer to use regular expression in Python.

Sorry, something changed, the raw string changed to

ABC(a =2,b=3,c=5,dddd=5,eeee=Something)

Answer 1

Non regex

>>> s="ABC(a =2,b=3,c=5,d=5,e=Something)"
>>> ','.join(s.split(",")[:-2])+")"
'ABC(a =2,b=3,c=5)'

If you want regex to get rid always the last 2

>>> s="ABC(a =2,b=3,c=5,d=5,e=6,f=7,g=Something)"
>>> re.sub("(.*)(,.[^,]*,.[^,]*)\Z","\\1)",s)
'ABC(a =2,b=3,c=5,d=5,e=6)'

>>> s="ABC(a =2,b=3,c=5,d=5,e=Something)"
>>> re.sub("(.*)(,.[^,]*,.[^,]*)\Z","\\1)",s)
'ABC(a =2,b=3,c=5)'

If its always the first 3,

>>> s="ABC(a =2,b=3,c=5,d=5,e=Something)"
>>> re.sub("([^,]+,[^,]+,[^,]+)(,.*)","\\1)",s)
'ABC(a =2,b=3,c=5)'

>>> s="ABC(q =2,z=3,d=5,d=5,e=Something)"
>>> re.sub("([^,]+,[^,]+,[^,]+)(,.*)","\\1)",s)
'ABC(q =2,z=3,d=5)'