Nice concise solution! But, not an efficient one as you're looping through the string for every print.

s = input()
is_alpha = is_digit = is_lower = is_upper = False

for char in s:
    if not is_alpha:
        is_alpha = char.isalpha()

    if char.isalpha():
        if not is_lower:
            is_lower = char.islower()
        if not char.islower() and not is_upper:
            is_upper = char.isupper()
    else:
        if not is_digit:
            is_digit = char.isdigit()

print(is_alpha or is_digit)
print(is_alpha)
print(is_digit)
print(is_lower)
print(is_upper)