是否可以仅使用try-except语句来避免整数、浮点和特殊字符?

这就是重新发明轮子,使用 str.isalpha

你可以用 assert 和 AssertionError

from string import ascii_letters

value = None
while True:
    try:
        value = input("Give a value: ")
        assert all(c in ascii_letters for c in value)
        break
    except AssertionError:
        print("Invalid input, try again")

print("Valid input:", value)

Give a value: aa!
Invalid input, try again
Give a value: !!!
Invalid input, try again
Give a value: !
Invalid input, try again
Give a value: rrTT
Valid input: rrTT