Python '；元组'；对象不支持项目分配&；名称错误：名称

代码

我一直在整理这些内容，不断收到错误“NameError:name splitCoord未定义”和“tuple”对象不支持项分配”有人能帮忙吗

import re
letters = ["x","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P"]

def coordSplit(coord):
        splitCoord=[]
        match = re.match(r"([A-Z]+)([0-9]+)", coord, re.I)
        if match:
            splitCoord = match.groups()
        count=0
        for letter in letters:
            if splitCoord[0] == letter:
                print(splitCoord[0])
                splitCoord[1] = str(count) #it can not change this value to a number NameError: name xxx is not defined
            count = count + 1
        return splitCoord

location = "H6"
coordSplit(location)

返回一个元组

因此，这一行：

splitCoord = match.groups()

不会工作，因为元组是不可变的

使用：

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我没有名字错误。您使用的是什么版本的Python？

splitCoord[1] = str(count)

splitCoord = list(match.groups())