从列表编辑变量(不能使用字典)

a = 10
b = 20
ls = [a, b]

如何使用将变量a更改为例如20 ls[0] 作为参数?

我记得有一种编写代码的方法,您可以在其中输入字符串和变量,然后将其转换为一行代码并运行它。

这就是我模糊的记忆,就像:

run(ls[0], "= 20")

显示整个代码,而不是压缩版本,我试图做的是从文本文件中加载和保存变量。(代码用于制作毒品的终端游戏。)

money = 11000

growtime = 45
growreward = 50
gramsweed = 0
growing = False

pots = 1
seeds = 0

cooktime = 90
cookreward = 20
gramsmeth = 0
cooking = False

tanks = 0
methlitres = 0

weedselling = 0
methselling = 0
currentlyselling = False

dealers = 1
dealtime = 120
dealamount = 15

stats = [money, growtime, growreward, gramsweed, growing, pots, seeds, cooktime,
         cookreward, gramsmeth, cooking, tanks, methlitres, weedselling, methselling,
         currentlyselling, dealers, dealtime, dealamount]

boolstats = [growing, cooking, currentlyselling]

def save():
    f = open("save.txt", "w")
    for stat in stats:
        f.write(str(stat) + "\n")
    f.close()
    mainmenu()

def load():
    i = 0
    f = open("save.txt", "r")
    for stat in stats:
        print(stat)
        stats[i] = f.readline(i)
        i += 1
    j = 0
    for stat in boolstats:
        if stat == "False": boolstats[j] = False
        else: boolstats[j] = True
        j += 1
    f.close()
    mainmenu()