檢查在Python 3

Question

多個整數最近我發現測試的方法的變量是否是一個int或沒有在Python 3。它的語法是這樣的：

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，測試多個變量，它的時候很快變得慘不忍睹：

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 

請問有沒有測試一個變量是否爲整數或不是一個更簡單的方法，如果不是，那麼一個變量更改爲true並打印唯一的消息給用戶？

請注意，我是一個Python新手程序員，但如果有一個更復雜的方法來做到這一點，我很想知道這個簡潔。另一方面，在Stack Exchange的代碼審查部分這會更好嗎？

Answer 1

這是我的解決方案

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

你並不需要爲每個變量單獨try-except塊。您可以在一箇中檢查所有變量，並且如果有任何變量是非數字的，則將引發exception，並拋出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