flag = not flag solution in Clear category for Caps Lock by maksimus
def caps_lock(text: str) -> str:
flag = False
res = ''
for el in text:
if el == 'a':
flag = not flag
res = res + el.upper() if flag else res + el
if __name__ == '__main__':
print(caps_lock("Why are you asking me that?"))
# These "asserts" are used for self-checking and not for an auto-testing
assert caps_lock("Why are you asking me that?") == "Why RE YOU sking me thT?"
assert caps_lock("Always wanted to visit Zambia.") == "AlwYS Wnted to visit ZMBI."
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Dec. 14, 2020