Question: 
Write a function to toggle characters case in a string.


Model's Code:
def toggle_string(s):
    return s.swapcase()



Sample Correct Code:
def toggle_string(string):
 string1 = string.swapcase()
 return string1


Asserts:
assert toggle_string("Python")==("pYTHON")
assert toggle_string("Pangram")==("pANGRAM")
assert toggle_string("LIttLE")==("liTTle")


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 557 of 974: 412/557 (73.96768402154399%): success