只允许字符串/整数没有小数

Question

How would I go about:

1. Only allowing a string/integer input
2. Not allowing decimals

Answer 1

cast to int and test str.isalpha:

while True:
    inp = raw_input() # input() python3
    try:
        inp = int(inp)
        break
    except ValueError:
        if inp.isalpha():
            break
        print("Invalid input")

If you actually want two different variables:

def get_name():
    while True:
        name = input("Enter your name: ")
        if name.isalpha():
            return name
        print("Invalid input")

def get_age():
    while True:
        age = input("Enter your age")
        try:
            return int(age)
        except ValueError:
            print("Invalid input")


name = get_name()
age = get_age()

Answer 2

Use isalnum built-in function.

>>> s = 'a'
>>> s.isalnum()
True
>>> s = '12'
>>> s.isalnum()
True
>>> s = '12.34'
>>> s.isalnum()
False
>>> s = 'ab12'
>>> s.isalnum()
True