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

You could solve this task with following function

def split_string(istr,ich,inte):
    res = []
    prev = 0
    for i,ch in enumerate(istr):
        if ch == ich:
            res.append(istr[prev:i])
            prev = i+1
            inte = inte-1
            if inte == 0:
                break            
    if prev < len(istr):
        res.append(istr[prev:])
    return res

or another solution

def split_string(istr,ich,inte):
    res = []
    h,_,r = istr.partition(ich)
    while r:
        res.append(h)
        inte = inte-1
        if inte == 0:
            h = r
            break               
        h,_,r = r.partition(ich)
    if h:
        res.append(h)
    return res

For following code

print split_string('192.168.15.1', '.', -1)
print split_string('192.168.15.1', '.', 2)

output will be

['192', '168', '15', '1']
['192', '168', '15.1']