“赋值前引用局部变量”的Python问题

Question

我对shell中的local variable referenced before assignment有问题，我觉得之前的任何答案都没有帮助。我能对这一准则提出一些具体建议吗：

import random

marginalCheck = random.randint(0,1)

print("This is the political campaign simulator")

global popularity

popularity = 50

def unpopularT():
    if popularity <= 30 and popularity < 0:
        print("You are decreasing in popularity.")
        popularityRecover = input("Do you wish to carry on or resign. If this carries on, you are likely to lose to a landslide by your Labour opposition")

        if popularityRecover == "resign":
            print("You have become an infamous, unpopular politician. You are remembered as a horrible, unkind person")
        else:
            print("You are hanging by a thread")
    elif popularity > 70:
        print("You are seriously doing well among your supporters and gaining new ones every day")
    else:
        print("You are doing fine so far in the campaign")

def campaignT():
            leadershipT = input("You are chosen as a candidate by your colleagues in the Tory leadership contest. Do you wish to take an A - Far Right, B - Right, C - Centre, D - Left or E - Far Left stance on the political spectrum")

            if leadershipT == "A" or leadershipT == "B":
                print("You have been elected as leader of the Tories and leader of the opposition. Now the election campaign starts")

                ClassicToryAusterity = input("What do you wish to do about the poor funding in the NHS by the Labour government. A - Do you wish to keep the current program, B - Do you wish to increase funding dramatically and increase taxes, C - Do you propose minor increases with small raises on tax, D - Do you support austere implementations on the Health Service")
                if ClassicToryAusterity == "A":
                        popularity += -5
                elif ClassicToryAusterity == "B":
                        popularity += 5
                elif ClassicToryAusterity == "C":
                        popularity += 2
                elif ClassicToryAusterity == "D":
                        popularity += -10
                BedroomTax = input("What do you propose to do about the bedroom tax. A - increase it, B - freeze it, C - Decrease it, D - Scrap it")
                if BedroomTax == "A":
                    popularity += -10
                elif BedroomTax == "B":
                    popularity += -5
                elif BedroomTax == "C":
                    popularity += -1
                else:
                    popularity += 10
                unpopularT()
            else:
                print("The Tory whip dislikes your stance and you have not been voted as leader")

chosenParty = input("Choose a party. A - LibDem, B - Labour, C- Tory")

if chosenParty == "C":
     print("You have been elected as a councillor by your fellow peers.")
     marginality = input("They want you to stand as a MP in a seat. Do you want to stand in a safe or marginal seat")
if marginality == "marginal":
    if marginalCheck == 0:
        print("You have failed to be elected to parliament")
    else:
        print("You are duly elected the MP for your constituency!")
        campaignT()
else:
    campaignT()

我不明白的是，我把流行度作为一个全局变量引用，但根据shell的说法，它是局部变量。在

Answer 1

如果要在函数内部使用access全局变量，则不需要声明任何内容，但是如果需要通过任何方式重新分配变量，则需要在函数内部声明它。例如：

test = 'hello'
def print_test():
    print test

def set_test():
    global test
    test = 'new value'

在您的例子中，您没有在函数中声明全局变量popularity，而是试图重新分配它。 所以在你的情况下：

^{pr2}$