從一個函數內調用2個函數

Question

我是一個相對的新手，並且試圖幫助我更好地理解函數。我已經創建了一個鍛鍊自己

寫一個簡單的程序：

1. 向3點簡單的Qs的這取決於用戶輸入
2. 應對每個Q（每個Q響應由3個獨特的一個確定功能）
3. 將這些問題的答案變成簡單的總結句末

我使用的一個功能作爲主要的「控制器」 - >問題（）

我想打電話給問題（），然後從內 - 呼叫其他3種功能。我有一種感覺我的函數需要的參數 - 但我不知道如何（我試圖把論點各種功能 - 但已經得到完全被卡住 - 返回錯誤（請參見下文））

我的代碼：

def naming(): # function to respond to name as per user input 
    if in_name == 'David': 
     print 'That\'s a cool name!!' 
    elif in_name == 'Jane': 
     print 'That\'s a great name!!' 
    else: 
     print 'That\'s an OK name!!!' 

def age(): # function to respond to age as per user input 
    if in_age > 60: 
     print 'That\'s old!!' 
    elif in_age < 15: 
     print 'That\'s young!!' 
    else: 
     print 'That\'s neither young nor old!!' 

def loc(): # function to respond to location as per user input 
    if in_loc == 'London': 
     print 'London is a big city!!' 
    elif in_loc == 'Manchester': 
     print 'Manchester is a wonderful place!!' 
    else: 
     print 'That sounds OK!!' 


def questions(): #function to own the whole process (name + age + loc) 
    in_name = raw_input('What is your name? -->') 
    naming() 
    in_age = input('How old are you? -->') 
    age() 
    in_loc = raw_input('Where do you live? -->') 
    loc() 
    print 'Your name is',in_name,', you are' ,in_age , 'years old and you live in' , in_loc,'.' 

questions() 

我猜主要問題函數中（） - 我需要提供某種形式的指令或參數的命名/年齡/ LOC內功能

真的會在這裏得到一些幫助！是的 - 在這裏還有一些其他類似的線程 - 但我已閱讀它們，沒有任何對我有意義。 理想情況下 - 對我來說最有用的東西是，如果一些好的撒瑪利亞人可以花3或4分鐘編輯我的代碼以正確運行。

在此先感謝！

PS - 這裏是我得到

Answer 1

在函數中定義的變量對於該函數是本地的。它可以從定義的點開始直到函數結束，並且只要函數正在執行就存在。

1. 可以傳遞值作爲參數傳遞給其他功能

   def naming(in_name): # function to respond to name as per user input 
       if in_name == 'David': 
        print 'That\'s a cool name!!' 
       elif in_name == 'Jane': 
        print 'That\'s a great name!!' 
       else: 
        print 'That\'s an OK name!!!' 
   
   def age(in_age): # function to respond to age as per user input 
       if in_age > 60: 
        print 'That\'s old!!' 
       elif in_age < 15: 
        print 'That\'s young!!' 
       else: 
        print 'That\'s neither young nor old!!' 
   
   def loc(in_loc): # function to respond to location as per user input 
       if in_loc == 'London': 
        print 'London is a big city!!' 
       elif in_loc == 'Manchester': 
        print 'Manchester is a wonderful place!!' 
       else: 
        print 'That sounds OK!!' 
   
   
   def questions(): #function to own the whole process (name + age + loc) 
       in_name = raw_input('What is your name? -->') 
       naming(in_name) 
       in_age = input('How old are you? -->') 
       age(in_age) 
       in_loc = raw_input('Where do you live? -->') 
       loc(in_loc) 
       print 'Your name is',in_name,', you are' ,in_age , 'years old and you live in' , in_loc,'.' 
   
   questions() 
   

2. 否則，你可以定義變量全球，所以你不必把它作爲參數傳遞。（不建議使用此方法）

   def naming(): # function to respond to name as per user input 
       if in_name == 'David': 
        print 'That\'s a cool name!!' 
       elif in_name == 'Jane': 
        print 'That\'s a great name!!' 
       else: 
        print 'That\'s an OK name!!!' 
   
   def age(): # function to respond to age as per user input 
       if in_age > 60: 
        print 'That\'s old!!' 
       elif in_age < 15: 
        print 'That\'s young!!' 
       else: 
        print 'That\'s neither young nor old!!' 
   
   def loc(): # function to respond to location as per user input 
       if in_loc == 'London': 
        print 'London is a big city!!' 
       elif in_loc == 'Manchester': 
        print 'Manchester is a wonderful place!!' 
       else: 
        print 'That sounds OK!!' 
   
   
   def questions(): #function to own the whole process (name + age + loc) 
       global in_name, in_age, in_loc 
       in_name = raw_input('What is your name? -->') 
       naming() 
       in_age = input('How old are you? -->') 
       age() 
       in_loc = raw_input('Where do you live? -->') 
       loc() 
       print 'Your name is',in_name,', you are' ,in_age , 'years old and you live in' , in_loc,'.' 
   
   questions() 
   

Answer 2

變量的函數questions()是不知道的其他功能（或者其範圍僅限於questions()功能）錯誤的截圖，這就是爲什麼你得到錯誤，未定義

def naming(in_name): # function to respond to name as per user input 
    if in_name == 'David': 
     print 'That\'s a cool name!!' 
    elif in_name == 'Jane': 
     print 'That\'s a great name!!' 
    else: 
     print 'That\'s an OK name!!!' 

def age(in_age): # function to respond to age as per user input 
    if in_age > 60: 
     print 'That\'s old!!' 
    elif in_age < 15: 
     print 'That\'s young!!' 
    else: 
     print 'That\'s neither young nor old!!' 

def loc(in_loc): # function to respond to location as per user input 
    if in_loc == 'London': 
     print 'London is a big city!!' 
    elif in_loc == 'Manchester': 
     print 'Manchester is a wonderful place!!' 
    else: 
     print 'That sounds OK!!' 


def questions(): #function to own the whole process (name + age + loc) 
    in_name = raw_input('What is your name? -->') 
    naming(in_name) 
    in_age = input('How old are you? -->') 
    age(in_age) 
    in_loc = raw_input('Where do you live? -->') 
    loc(in_loc) 
    print 'Your name is',in_name,', you are' ,in_age , 'years old and you live in' , in_loc,'.' 

questions() 

Answer 3

更好的方法是將它們作爲參數傳遞給函數。

def naming(in_name): # function to respond to name as per user input 
    if in_name == 'David': 
     print 'That\'s a cool name!!' 
    elif in_name == 'Jane': 
     print 'That\'s a great name!!' 
    else: 
     print 'That\'s an OK name!!!' 

def questions(): #function to own the whole process (name + age + loc) 
    in_name = raw_input('What is your name? -->') 
    naming(in_name) 

再次變in_age，它需要轉換爲int爲raw_input默認處於string格式。

in_age = input('How old are you? -->') 
age(int(in_age))