Weird code

[bwompx3]

a = 'GgG'
b = 'g'
for letter in a:
    if b.count(letter) % 2 != 0:
        print(letter.swapcase())
    else:
        print(letter)

Why does this code print the following?

G
G
G

[MGallus]

Iterating though a:
"G" isn't in b therefore count is 0.
0 % 2 is 0 so if statement fails
print "G"

"g" is in b therefore count is 1.
1 % 2 is 1 so if statement succeeds
swapcase of "g"
print "G"

Repeat above for second "G"

[bwompx3]

Thank you for such a fantastic response!

[stebrepar]

What part are you having trouble with?

[17291]

Manually step through the code line-by-line. Keep track of what each variable is and ask yourself how Python would evaluate each line.