Solving split string in python without the use of split() function

Question

Faced an interview question in Python that was as follow?

ex: 
input = (\'192.168.15.1\', \'.\', -1) ===> output = (192, 168, 15, 1)
input = (\'192.168.15         


        

Answer 1

another simpler and short approach is you can use regular expressions like this:

import re
def split_without_using_split_fn(s, c, i):
    if i<=0:
        print(re.findall("[^"+c+"]+(?=\\"+c+"|$)", s))
    else:
        l=re.findall("[^"+c+"]+(?=\\"+c+"|$)", s)
        print(l[0:-i]+[c.join(l[i:])])

split_without_using_split_fn(*('192.168.15.1', '.', -1))
split_without_using_split_fn(*('192.168.15.1', '.', 2))

Output:

$ python3 p.py 
['192', '168', '15', '1']
['192', '168', '15.1']
$