DESCRIPTION:
This time no story, no theory. The examples below show you how to write function accum:
Examples:
accum("abcd") -> "A-Bb-Ccc-Dddd"
accum("RqaEzty") -> "R-Qq-Aaa-Eeee-Zzzzz-Tttttt-Yyyyyyy"
accum("cwAt") -> "C-Ww-Aaa-Tttt"
The parameter of accum is a string which includes only letters from a..z and A..Z.
def accum( s ):
ans = ""
for i in range( len( s ) ):
ans += ( s[i] * ( i + 1 ) ).title() + "-"
return ans[ : -1 ]