Help me in solving PYTH99A problem

My issue

need this problem solution

My code

# Count how many 'o's are present in the string using a 'for' loop and 'if' condition

string = 'bolloon'

# use this variable to count occurrences of o
count_o = 0 
for char in string:
    if(char == 'o'):
     count_o += 1
     print(count_o)

Learning course: Python Programming
Problem Link: For Loop in Python Programming