How to search for multiple conditions in python regex? -

How to search for multiple conditions in python regex? -

i'm writing helper script dnd needs, part of script should take either integers or dice notation. latter in format of

1d20+4

where can replace 1, 20 , natural number, , +4 integer. input can

hit +3 harm 1d8+1 hp 3d6+2

and split 2 list using re. problem when seek observe both dies , numbers. know that observe number need use

re.listall('[\+\-][0-9]*',input_line)

and observe die need search for

re.listall('[0-9]*d[0-9]*',input_line)

and i'm quite search die bonus need

re.listall('[0-9]*d[0-9]*[\+\-][0-9]*',input_line)

however, can't figure how search combination of two. though placing them in parenthesis, i.e.

re.listall('([\+\-][0-9]*)([0-9]*d[0-9]*)',input_line)

however, error sre_constants.error: unbalanced parenthesis

which leaves me confused. how can overcome this?

i think need regular expression:

re.findall('((\d+d\d+)?[\+-]\d+)', input_line)

as side note, can utilize \d instead of [0-9]. so, sec part same in code. first part '(\d+d\d+)?' optional (because of ?) , matches number followed letter d followed number.

in illustration (hit +3 harm 1d8+1 hp 3d6+2), match +3, 1d8+1 , 3d6+2

python regex