Printing this type of list

I want to create a list like this:

mylist = ['a', 'ab', 'abc', 'abcd']

Is there any way to do this?

>Solution :

def generate_list(start='a', end='d'):
    mylist = []
    start, end = ord(start), ord(end)
    for i in range(start, end + 1):
        sublist = [chr(j) for j in range(start, i + 1)]
        mylist.append(''.join(sublist))
    return mylist

mylist = generate_list()
print(mylist)

prints

['a', 'ab', 'abc', 'abcd']

another example:

mylist2 = generate_list(end='f')
print(mylist2)

prints

['a', 'ab', 'abc', 'abcd', 'abcde', 'abcdef']