一個檔案如下：

找出相同元素的值的和並寫入檔案：

程式碼如下：

dict1 = {}
with open("統計檔案.txt",'r') as f:

    # 按行讀取檔案
    alist = f.readlines()

    # 去除空行
    for str in alist:
        if str == '\n':
            continue
        else:
            # 去除後邊的空格，並分割成列表
            a = str.rstrip("\n")
            blist = a.split("   ")
 

            if blist[0] in dict1:
                dict1[blist[0]] += int(blist[1])
            else:
                dict1[blist[0]] = int(blist[1])
print(dict1)
# 將結果格式化寫入檔案
with open("統計結果.txt","a") as file:
    for key in dict1.keys():
        file.write('{}  {}\n'.format(key,dict1[key]))