检查在Python 3

Question

多个整数最近我发现测试的方法的变量是否是一个int或没有在Python 3。它的语法是这样的：

try: 
    a = int(a) 
except ValueError: 
    print("Watch out! The Index is not a number :o (this probably won't break much in this version, might in later ones though!") 
    error = True 

然而，测试多个变量，它的时候很快变得惨不忍睹：

def IntegerChecker(a, b, c, d): #A is Index, B is End Time, C is Distance, D is Speed Limit 
    global error 
    try: 
     a = int(a) 
    except ValueError: 
     print("Watch out! The Index is not a number :o (this probably won't break much in this version, might in later ones though!") 
     error = True 
    try: 
     b = int(b) 
    except ValueError: 
     print("Watch out! The End Time is not a number :o") 
     error = True 
    try: 
     c = int(c) 
    except ValueError: 
     print("Watch out! The Distance is not a number :o") 
     error = True 
    try: 
     d = int(d) 
    except ValueError: 
     print("Watch out! The Speed Limit is not a number :o") 
     error = True 

请问有没有测试一个变量是否为整数或不是一个更简单的方法，如果不是，那么一个变量更改为true并打印唯一的消息给用户？

请注意，我是一个Python新手程序员，但如果有一个更复杂的方法来做到这一点，我很想知道这个简洁。另一方面，在Stack Exchange的代码审查部分这会更好吗？

Answer 1

这是我的解决方案

def IntegerChecker(**kwargs): #A is Index, B is End Time, C is Distance, D is Speed Limit 
    error = False 
    err = { 
     'index': ('Watch out! The Index is not a number :o (this probably ' 
        'won\'t break much in this version, might in later ones though!'), 
     'end_time': 'Watch out! The End Time is not a number :o', 
     'distance': 'Watch out! The Distance is not a number :o', 
     'speed': 'Watch out! The Speed Limit is not a number :o' 
    } 
    for key, value in kwargs.items(): 
     try: 
      int(value) 
     except ValueError: 
      print(err.get(key)) 
      error = True 
    return error 

IntegerChecker(index=a, end_time=b, distance=c, speed=d) 

Answer 2

你并不需要为每个变量单独try-except块。您可以在一个中检查所有变量，并且如果有任何变量是非数字的，则将引发exception，并抛出error。

def IntegerChecker(a, b, c, d): #A is Index, B is End Time, C is Distance, D is Speed Limit 
    global error 
    try: 
     a = int(a) 
     b = int(b) 
     c = int(c) 
     d = int(d) 
    except ValueError: 
     print("Watch out! The Index is not a number :o (this probably won't break much in this version, might in later ones though!") 
     error = True