如何跟蹤python中的全局變量

Question

我想跟蹤變量TOTAL_TRI。 TOTAL_TRI包含遊戲中正確回答的問題的數量。當調用statistics時，我需要保存該值並將其傳遞給函數statistics。從本質上講，玩家將玩遊戲py_game，TOTAL_TRI將保存他們得到的問題的數量，當玩家調用功能statistics時，它會顯示他們正確答案的數量？我一直在玩弄這一段時間，但沒有取得重大進展。有任何想法嗎？

P.S. 菜單中的其他遊戲尚未實現，但它們將執行相同的遊戲 - 保存正確數量的問題 - 並讓玩家撥打statistics種類的東西。

在使用全局變量更新，企圖：

#py_game------------------------------------------------------------------------ 
import random 
from random import choice 
from random import randint 
TOTAL_TRI = 0 
def py_game(): 
    for k in range (1,2): 
     print('\nPractice Problem', k, 'of 2') 
     min_pyramid_size = 3 
     max_pyramid_size = 5 
     total_chars = 0 
     num_rows = random.randint(min_pyramid_size, max_pyramid_size) 
     for i in range(num_rows): 
      x = ''.join(str(random.choice('*%')) for j in range(2*i+1)) 
      print(' ' * (num_rows - i) + x) 
      total_chars = total_chars + x.count('%') 
     try: 
      user_answer = int(input('Enter the number of % characters' + \ 
            ' in the pyramid: ')) 
     except: 
       user_answer = print() 
     if user_answer == total_chars: 
      print('You are correct!') 
     else: 
      print("Sorry that's not the correct answer") 
    points = 0 
    global TOTAL_TRI 
    for k in range (1,2): 
     print('\nProblem', k, 'of 10') 
     min_pyramid_size = 3 
     max_pyramid_size = 5 
     total_chars = 0 
     num_rows = random.randint(min_pyramid_size, max_pyramid_size) 
     for i in range(num_rows): 
      x = ''.join(str(random.choice('*%')) for j in range(2*i+1)) 
      print(' ' * (num_rows - i) + x) 
      total_chars = total_chars + x.count('%') 
     try: 
      user_answer = int(input('Enter the number of % characters' + \ 
            ' in the pyramid: ')) 
     except: 
       user_answer = print() 
     if user_answer == total_chars: 
      print('You are correct!') 
      points +=1 
     else: 
      print("Sorry that's not the correct answer") 
     TOTAL_TRI = points 


#------------------------------------------------------------------------------ 
def statistics(points): 

    print('\nPyramid Game---------------------------') 
    incorrect = 10 - (points) 
    print ('You answered', points, 'questions correctly') 
    print ('You answered', incorrect, 'questions incorrectly') 



#Main Menu-------------------------------------------------------------------------- 

def main_menu(): 
    calculation_game = print("Enter 1 for the game 'Calculation'") 
    bin_reader = print("Enter 2 for the game 'Binary Reader'") 
    trifacto_game = print("Enter 3 for the game 'Trifacto'") 
    statistics = print("Enter 4 to view your statistics") 
    display_data = print("Enter 5 to display data") 
    save_game = print("Enter 5 to save your progress") 
    user_input = int(input('Make your selection: ')) 
    if user_input == 1: 
     calculation() 
    if user_input == 2: 
     binary_reader() 
    if user_input == 3: 
     py_game() 
    if user_input == 4: 
     statistics(TOTAL_TRI) 
    if user_input == 5: 
     save_game() 
    if user_input != 1 or 2 or 3 or 4 or 5: 
     print('invalid input') 
     print('\n') 
     main_menu() 



main_menu() 

Answer 1

在公共範圍內聲明一個變量TOTAL_TRI = 0。每當你想訪問它在功能，使用global關鍵字：

TOTAL_TRI = 0 

def some_function(...): 
    global TOTAL_TRI 
    ... # do something 

你仍然可以做到這一點，而無需使用global關鍵字，但你囤聲明一個局部變量與隱藏了同名的風險全球性的，取決於你做什麼。

編輯：我還要提到的是，你可以聲明變量內的功能，如果你希望該變量是在所有其他的功能，可見，你應該把它聲明爲相同的函數內部全球它被定義以及。