Python Interview Question - Beginner to Advance

Input = "AAAABBBCCDAABBB" Output= A4B3C2D1A2B3

# define a function() that takes string input and return null if string is null and returns 1st occurrences of character followed by number of occurrences and so on. # This function takes a string and returns processed string output. def str_skimmer(input_string): # Return null string if input is null. if not input_string: return "" # Store values for 2 parameters - "Reference Character and "Count" prev_char=input_string[0] op=[] count=1 for i in input_string[1:]: if (i==prev_char): count += 1 print(i, count, op) else: op.append(prev_char+str(count)) prev_char=i count=1 op.append(prev_char+str(count)) print(op) return ''.join(op) #O: A4B3C2D1A2B3 ip="AAAABBBCCDAABBB" op= str_skimmer(ip) print(op)

Input = "TBD" Output= TBD