编写一个程序，生成一个10x10的随机矩阵并保存为文件（空格分隔行向量、换行分隔列向量），在写程序将刚才保存的矩阵文件另存为CSV格式，用Excel或文本编辑器打开看看结果对不对

import random
def s_txt(low,high,txtname):
    f = open("{}.txt".format(txtname),"w")
    for line in range(10):
        word = ""
        for row in range(10):
            word = word + str(random.randrange(low,high)) + " "
        f.write(word + "\n")
    f.close()

def s_csv(txtname,csvname):
    f1 = open("{}.txt".format(txtname),"r")
    f2 = open("{}.csv".format(csvname),"w")
    for line in f1:
        after = line.replace(" ",",")
        f2.write(after)
    f1.close()
    f2.close()

def main():
    low,high = eval(input("请输入随机数下限low、上限high，并用逗号隔开："))
    txtname = input("请输入txt文件名：")
    s_txt(low,high,txtname)
    csvname = input("请输入csv文件名：")
    s_csv(txtname,csvname)

main()