如何對特定數據/列上的整個文件進行排序？

Question

[data.txt中]

CODE\tUSERNAME\tSPENT\tCOLUM1\tCOLUM2 

我想文件[data.txt中]排序，使用 「失效」。我怎樣才能做到這一點？

Answer 1

是的，當然是有可能的。例如：

# read file into array of lines 
lines = open("data.txt").readlines() 

# sort those lines using a lambda 
lines.sort(key = lambda line : line.split("\t")[2]) 

拉姆達擠出從該行的列SPENT將用作排序鍵。

Answer 2

def subMenu_5(): 

    # read file into array of lines 
    lines = open("database").readlines() 

    # sort those lines using a lambda 
    lines.sort(key = lambda line : line.split("\t")[3]) 

    clientList = [] 
    dataQuantify = 0 
    database = open('database','r') 
    i = 1 
    while (i == 1): 
     if (database.readline() == ''): 
      i = 0 
     else: 
      dataQuantify = dataQuantify + 1 
    database.close() 


    sortList = open("sortList","w") 
    for i in range (3): 
     sortList.write(lines[i]) 
    sortList.close() 

    print "[Código] [Nome] [Quant. Prod. Comprados] [Valor Gasto] [Descontos] \n" 
    sortList = open('sortList','r') 
    i = 0 
    while (i < dataQuantify): 
     clientList.append(sortList.readline()) 
     print clientList[i] 
     i = i + 1 
    database.close() 
    raw_input("Precione 'ENTER' para voltar ao menu principal... ") 
    return 

這項工作！非常Thx！