Root Identification in a list of Data in python:

Question

I am new to Python. I tried to come up with "Root Identification" from the list of data. But it doesn't work. Here is code that I have tried:

listData=["blackish", "blacken","blacked"]

The output I expect is:

root = [black] and suffixLi = ["ish", "en", "ed"] 

Rest of the code:

def root():
    i=0
    j=0
    string = ""
    for word in listData:
        for i in range(len(min(listData, key=len))-1):
            print(len(min(listData, key=len)))
            if (listData[i][j]==listData[i+1][j]):
                string=string+listData[i][j]
                print(listData[i][j])
                print(string)
            i=i+1
            j=j+1
    print(string)  

Answer 1

Presuming you want trying to find the common prefix:

def root_pre(l):
    root = ""
    for t in zip(*l):
        if not all(t[0] == s for s in t):
            break
        root += t[0]
    ln = len(root)
    pres = [s[ln:] for s in listData]
    return root, pres

print(root_pre(listData))
('black', ['ish', 'en', 'ed'])