如何处理语法错误？

Question

对于我正在做的程序，它通过调查风格问题生成一个动漫推荐列表，并有一个CSV文件存储有关动漫的信息，如流派。

然而，在运行程序时，我想测试做问题时是否会出现语法错误，并在做完所有问题后打印错误。我希望它能做的是，当输入不正确时，会弹出语法错误。

这就是我所做的：

if adventure == 'yes':
   with open("AnimeGenre3.csv", 'r', newline='') as f:
       for row in csv.reader(f):
            if row[4] == 'yes':
               anime = str(row[1])
               looping = False
               if anime not in anime_list:
                  anime_list.append(anime)

else:
    print('''
There seems to be a problem in one of the questions
    ''')

比方说，“你喜欢动漫吗”，然后你输入6，语法错误的东西就会弹出来，并重新做这个问题。但在做完所有问题并生成动漫列表后，它就会弹出。

另一个问题是如何在完成问题并打印推荐的动漫后再次启动程序。它会询问您是否要重新开始，但最终没有这样做。这就是我所做的。

StartAgain = str(input('Do you like to start again; yes or no: '))

if StartAgain == 'yes':
     print('''
Let's begin ''')
break
if StartAgain == 'no':
      print('thank you for coming')

else:
  print('''
 Sorry Man got to do it again''')

 # an if statement if the user wants to start again
 # this should rerun the program.

现在，这是我到目前为止完成的完整程序，老实说，我需要找到一种方法来让它变得更简单，希望我的注释足够好。

 import csv
 anime_list = []
 #in the csv AnimeGenre3.csv it contains information such as the animes, the number of 
 episodes and genres

#printing information about the program.
#has an if statement to identify if it user wants to start the program.

looping1 = True
looping2 = True

print('This is a program that identifies specific anime for you')

while looping1 == True:
begin = str(input('Do you like to start; yes or no: '))

if begin == 'yes':
    print('''
Let's begin
''')
    break
if begin == 'no':
    print('thank you for coming')
else:
    print('''
Sorry Man got to do it again
        ''')
#this section is where the program ask the user questions from there
# it will identify, the genres the user is interested in.

while looping2 == True:

action = str(input('Do you like action; yes or no: '))
adventure = str(input('Do you like adventure; yes or no: '))
print('')
print('recommended anime')
#having to use if statements to find any anime that either say "yes" in the CSV file
# it sorts out all of the sorts that the user said yes to.
# It goes through the rows to identify all of the user genres that say yes
# it should print out the recommend anime
# this prints out a long list of anime

if action == 'yes':
    with open("AnimeGenre3.csv", 'r', newline='') as f:
        for row in csv.reader(f):
            if row[3] == 'yes':
                anime = str(row[1])
                looping = False
                if anime not in anime_list:
                    anime_list.append(anime)
                    
if adventure == 'yes':
    with open("AnimeGenre3.csv", 'r', newline='') as f:
        for row in csv.reader(f):
            if row[4] == 'yes':
                anime = str(row[1])
                looping = False
                if anime not in anime_list:
                    anime_list.append(anime)

else:
    print('''
There seems to be a problem in one of the questions
        ''')
# if there is a syntax error within the program, it should pop up to the user saying this
    
print(anime_list)

StartAgain = str(input('Do you like to start again; yes or no: '))

if StartAgain == 'yes':
    print('''
Let's begin ''')
    break
if StartAgain == 'no':
    print('thank you for coming')

else:
    print('''
Sorry Man got to do it again''')

# an if statement if the user wants to start again
# this should rerun the program.

Answer 1

关于重新启动，您唯一的代码将打印一条语句。它不会重复一个函数。您可能希望考虑对您的程序进行更多的调制(组织)，这样当您再次启动时，您可以调用某个函数。例如，

def main()
      //this contains your overall logic, starting/ending the program and/or repeating it
     // at some point in time, you call animeselector() to start, and if it needs repeating, you call it again

 def animeselector ()
      //this controls the in/out and selection process

就确保输入格式正确而言，这可能是另一个功能。它可以只检查答案是“是”还是“否”，如果不是，则更改一个变量(如badanswer == false变为true)。然后，这会在你想要的时候触发其他事情(重做)。

我建议你去看看学习Python的方法(后面的章节)，一些PyGame教程也可以很好地了解如何更好地调整你的编程(因为如果制作一款游戏，你需要一个整体的函数来运行游戏，而不是一堆更小的函数来处理游戏中的活动)。