CODEWITHSUNDEEP
pythonregex
Ramachandra Sai
Ramachandra Sai

Reputation: 43

How to split some of the minus operators based on a condition?

I was working of a mathematical formula ,I need to split operands for the processing,

I was using re.split('\+|\-|\*|\/', Formula) function in python to split the formula into operands.

But I have one notation wa(A,[-126,-123,-120,-117,-114,-111,-108,-105,-102,-99,-96,-93,-90,-87,-84,-81,-78])-B-C-D which I couldn't split using the above regex as its splits the number in the list too(its taking - before 126 also for spliting)

Is there any way we can using regex and split into ['wa(A,[-126,-123,-120,-117,-114,-111,-108,-105,-102,-99,-96,-93,-90,-87,-84,-81,-78])','B','C','D'] , or I need to loop through the expression and write the logic?

Upvotes: 1

Views: 51

Answers (1)

The fourth bird
The fourth bird

Reputation: 163477

You might use an alternation to match either word characters followed by an opening till closing parenthesis, or match any char except a hyphen.

\w+\([^()]+\)|[^\s+/*-]+

See a regex demo and a Python demo.

import re

pattern = r"\w+\([^()]+\)|[^\s+/*-]+"
s = "wa(A,[-126,5-123,-120,-117,-114,-111,-108,-105,-102,-99,-96,-93,-90,-87,-84,-81,-78])-B-C-D"

print(re.findall(pattern, s))

Output

['wa(A,[-126,5-123,-120,-117,-114,-111,-108,-105,-102,-99,-96,-93,-90,-87,-84,-81,-78])', 'B', 'C', 'D']

Upvotes: 2

Related Questions