如何在函数中更改变量

Question

我想更改函数内部的函数变量。这是代码：

import csv
import random


with open('songs.csv') as f:
#2 - start
    reader = csv.reader(f)
    chosen_row = random.choice(list(reader))
    print(chosen_row[0][0] + ' by ' + chosen_row[1])

def song():
    answer = input("what is your answer? (all lowercase) :")
    if chosen_row == ['Perfect', ' Ed sheeran']:
        answer1 = 'perfect'
        if answer == answer1:
            print("3 points!")
            points = points + 3


    elif answer != answer1:
        print("Wrong, 1 more attempt")
        attempt = attempt + 1
        attempt9 = input("what is your answer? (all lowercase) :")
        if attempt9 == answer1:
            print("1 point")
            points = points + 1
            attempt = attempt - 1
        elif attempt9 != answer1:
            attempt = attempt + 1
song()

#I want to change chosen_row and answer1