split a string after it finds a "," and an integer

Question

For example consider a string:

str1 = '1=apple, 2=orange, mango, 3=grape'
#split string by ,
chunks = str1.split(', ')

if i run the code it gives me an output: '1=apple', '2=orange', 'mango', '3=grape'

but I want my output to be: '1=apple', '2=orange, mango', '3=grape'

Answer 1

With the regex module you can model this exactly with a positive lookahead. This says, split on aa comma and space that is followed by a number:

import re

str1 = '1=apple, 2=orange, mango, 3=grape'

re.split(r', (?=\d)', str1)
# ['1=apple', '2=orange, mango', '3=grape']