这是我目前的代码，当我运行它时，我遇到了一些错误......我不确定它们是什么。
追踪（最近一次呼叫最后一次）：
文件“D：/。实际 W4 / Lab3Problem1.py“，第54行，in main（）的
文件“D：/。实际W4 / Lab3Problem1.py”，第8行，在main中 nestediffunction（）
文件“D：/。实际W4 / Lab3Problem1.py”，第27行，在nestediffunction中 if（booksread == 0）：
NameError：名称'booksread'未定义
def main():
print("Welcome to Ryan's book club!")
booksread = int(input('Please enter the amount of books you have read so far: '))
# if (booksread < 0):
# print("That's impossible! Please re-enter the amount of books you have read: ")
# booksread1 = int(input('Please enter the amount of books you have read so far: '))
#simpleiffunction()
nestediffunction()
#eliffunction()
def simpleiffunction():
if (booksread == 0):
print('You have 0 points!')
if (booksread == 1):
print('You have 5 points!')
if (booksread == 2):
print('You have 15 points!')
if (booksread == 3):
print('You have 30 points!')
if (booksread >= 4):
print('You have 60 points!')
def nestediffunction():
if (booksread == 0):
print('You have 0 points!')
else:
if (booksread == 1):
print('You have 5 points!')
else:
if (booksread == 2):
print('You have 15 points!')
else:
if (booksread == 3):
print('You have 30 points!')
else:
if (booksread >= 4):
print('You have 60 points!')
def eliffunction():
if (booksread == 0):
print('You have 0 points!')
elif (booksread == 1):
print('You have 5 points!')
elif (booksread == 2):
print('You have 15 points!')
elif (booksread == 3):
print('You have 30 points!')
elif (booksread >= 4):
print('You have 60 points!')
main()
答案 0 :(得分：5)
变量booksread不在其使用的任何功能nestediffunction，eliffunction和simpleiffunction的范围内。修改这两个函数，以便您可以接受booksread变量作为参数，然后可以从main传递它。
def simpleiffunction(booksread ):
....
def nestediffunction(booksread ):
....
def eliffunction(booksread ):
....
答案 1 :(得分：2)
您必须在主区域中传入booksread变量。这允许该功能知道用户输入的书籍的编号。该函数使用numbooksread变量来存储传递的变量，因此可以在函数中使用它。
nestediffunction(booksread)
def nestediffunction(numbooksread):
if (numbooksread == 0):
print('You have 0 points!')
else:
if (numbooksread == 1):
print('You have 5 points!')
else:
if (numbooksread == 2):
print('You have 15 points!')
else:
if (booksread == 3):
print('You have 30 points!')
else:
if (numbooksread >= 4):
print('You have 60 points!')
答案 2 :(得分：1)
我对您的代码进行了一些调整：
class Dummy():
def __init__(self):
self.main()
def main(self):
print("Welcome to Ryan's book club!")
booksread = int(input('Please enter the amount of books you have read so far: '))
# if (booksread < 0):
# print("That's impossible! Please re-enter the amount of books you have read: ")
# booksread1 = int(input('Please enter the amount of books you have read so far: '))
#simpleiffunction()
self.nestediffunction(booksread)
#eliffunction()
def simpleiffunction(self):
if (booksread == 0):
print('You have 0 points!')
if (booksread == 1):
print('You have 5 points!')
if (booksread == 2):
print('You have 15 points!')
if (booksread == 3):
print('You have 30 points!')
if (booksread >= 4):
print('You have 60 points!')
def nestediffunction(self, booksread):
self.booksread = booksread
if (booksread == 0):
print('You have 0 points!')
else:
if (booksread == 1):
print('You have 5 points!')
else:
if (booksread == 2):
print('You have 15 points!')
else:
if (booksread == 3):
print('You have 30 points!')
else:
if (booksread >= 4):
print('You have 60 points!')
def eliffunction(self):
if (booksread == 0):
print('You have 0 points!')
elif (booksread == 1):
print('You have 5 points!')
elif (booksread == 2):
print('You have 15 points!')
elif (booksread == 3):
print('You have 30 points!')
elif (booksread >= 4):
print('You have 60 points!')
Dummy()
1）如果你有一个定义的类，你可以使用__init__，那么当你运行这个类时，这个定义总会被执行。
2）定义总是需要'自我'。
3）booksread在main（）中定义，因此其他定义不知道它的存在。因此，如果你把它放在nestediffunction（）中，那么它也知道它是什么样的，它有什么价值。
编辑：
如果你不介意的话，我会把你重写。
我让它变得更简单一些，这将向你展示一些更清晰的影响。
class Dummy():
def __init__(self):
self.askUser()
def askUser(self):
nBooks = int(input('Number of books read: '))
self.numberPoints(nBooks)
def numberPoints(self, nBooks):
self.nBooks = nBooks
if (nBooks == 0):
print('You have 0 points!')
elif (nBooks == 1):
print('You have 5 points!')
elif (nBooks == 2):
print('You have 15 points!')
elif (nBooks == 3):
print('You have 30 points!')
else:
print('You have 60 points!')
Dummy()
答案 3 :(得分：1)
函数中的变量默认不是全局变量，因此其他函数不存在。您需要将其作为属性传递：
def main():
print("Welcome to Ryan's book club!")
booksread = int(input('Please enter the amount of books you have read so far: '))
# if (booksread < 0):
# print("That's impossible! Please re-enter the amount of books you have read: ")
# booksread1 = int(input('Please enter the amount of books you have read so far: '))
#simpleiffunction()
nestediffunction(booksread)
#eliffunction()
def nestediffunction(booksread):
if booksread == 0: # Also, you don't need parenthesis here
print('You have 0 points!')
等
答案 4 :(得分：0)
你可以按照上面的答案，这些答案绝对正确你可以稍微改变你的代码结构：
def simpleiffunction():
if (booksread == 0):
print('You have 0 points!')
if (booksread == 1):
print('You have 5 points!')
if (booksread == 2):
print('You have 15 points!')
if (booksread == 3):
print('You have 30 points!')
if (booksread >= 4):
print('You have 60 points!')
def nestediffunction():
if (booksread == 0):
print('You have 0 points!')
else:
if (booksread == 1):
print('You have 5 points!')
else:
if (booksread == 2):
print('You have 15 points!')
else:
if (booksread == 3):
print('You have 30 points!')
else:
if (booksread >= 4):
print('You have 60 points!')
def eliffunction():
if (booksread == 0):
print('You have 0 points!')
elif (booksread == 1):
print('You have 5 points!')
elif (booksread == 2):
print('You have 15 points!')
elif (booksread == 3):
print('You have 30 points!')
elif (booksread >= 4):
print('You have 60 points!')
if __name__=="__main__":
print("Welcome to Ryan's book club!")
booksread = int(input('Please enter the amount of books you have read so far: '))
# if (booksread < 0):
# print("That's impossible! Please re-enter the amount of books you have read: ")
# booksread1 = int(input('Please enter the amount of books you have read so far: '))
#simpleiffunction()
nestediffunction()
#eliffunction()