Google Interview Question 2 - Remove duplicates. Uniq on a string

solve.py

#
#
# example input: aaaabbcaaa
# output: abca
#
#
# req: python 3.5+
#
#

def solve(string):
    ans=""
    cont=False
    oldval="BLAH"
    for i,val in enumerate(string):
        # print(f"{i} {val}")
        if val==oldval:
            cont=True
        else:
            ans += val
            cont=False
        oldval=val
    print(ans)

solve("abc")          # abc
solve("aaaabbcaaa")   # abca
solve("abczzz")       # abcz
solve("assssssssssswassssddddddddssss")
solve("kooooooooossstttttttttttttttttiaaaaaaaaaa       asdfasdf")