通过 raw_input 方法检查用户输入

Question

我正在尝试使用 raw_input 从用户那里获取输入，我想捕捉用户可能输入数字的情况。我一直在搜索抛出堆栈溢出和其他各种网站，但我没有遇到任何对我来说很有意义的东西。由于 raw_input 总是返回一个字符串，是否有可能捕获这样的实例？

class Employee(object):

    def __init__(self,name,pay_rate,hours):

        self.name = name
        self.pay_rate = pay_rate
        self.hours = ("mon","tues","wed","thursday","friday","saturday","sunday")

    def __str__(self):
        return self.name       

    @property
    def weekly_total(self):
        return sum(self.hours)

    @classmethod
    def from_input(cls):
        while True:
            try:
                name = raw_input("Enter new employee name\n")
            except ValueError:
                print("\n  This is a integer  ")
                continue           
            else:
                break
        while True:
            try:
                pay = input("Enter pay rate  ")
            except ValueError:
                print("You must enter a value  ")
                continue
            else:
                break
        while True:
            try:
                hours = input("Enter a tuple for days monday through sunday  ")
            except ValueError:
                print("use must enter a tuple with 7 integer values")
                continue
            else:
                break
        return cls(name,pay,hours)    

employee = Employee.from_input()
print str(employee)

Answer 1

我会将其拆分为单独的函数；有更简洁的方法可以做到这一点，但我已经使它们尽可能相似，以便您可以看到过程：

def get_int_input(prompt):
    while True:
        s = raw_input(prompt)
        try:
            i = int(s)
        except ValueError:
            print "Please enter an integer."
        else:
            return i

def get_non_int_input(prompt):
    while True:
        s = raw_input(prompt)
        try:
            i = int(s)
        except ValueError:
            return s
        else:
            print "Please don't enter an integer."