在python中搜索和比較csv文件中的valuse

Question

我有兩個csv文件 - 一個主文件&。我想要從更新文件中獲取特定列，&檢查主對象的值。

兩個文件將有應該&大致是這樣的同列：

Listed Company's English Name,Listed Company's Chinese Name,Stock Code,Listing Status,Director's English Name,Director's Chinese Name,Capacity,Position,Appointment Date (yyyy-mm-dd),Resignation Date (yyyy-mm-dd) 
C.P. Lotus Corporation,________,00122,Current,CHEARAVANONT Dhanin,___,Executive Director,,2009-12-31, 
C.P. Lotus Corporation,________,00121,Current,CHEARAVANON Narong,___,Executive Director,,2001-02-01, 
C.P. Lotus Corporation,________,00121,Current,CHEARAVANONT Soopakij,___,Executive Director,CEO,2000-04-14, 

基本上，我想遍歷更新文件，從更新文件&檢查，看它是否以每隻股票代碼值存在於主文件中。

然後，對於每個匹配的股票代碼，我需要檢查Director名稱值的差異，並跟蹤那些不匹配的值。

我已經按照這個例子，但它似乎並沒有這樣做完全是我需要（或者我不完全瞭解它...）：Python: Comparing two CSV files and searching for similar items

f1 = file(csvHKX, 'rU') 
f2 = file(csvWRHK, 'rU') 
f3 = file('results.csv', 'w') 

csv1 = csv.reader(f1) 
csv2 = csv.reader(f2) 
csv3 = csv.writer(f3) 

scode = [row for row in csv2] 

for hkx_row in csv1: 
    for wrhk_row in scode: 
    if hkx_row[2] != wrhk_row[2]: 
     print 'HKX:', hkx_row 
    continue 

f1.close() 
f2.close() 
f3.close() 

更新文件包含以下股票代碼：'00121'&'01003'（用於測試）。

看起來好像代碼遍歷列表比較每行&打印出一行，如果股票代碼不符合行的線。所以當第一列讀取'00121'時，它會打印出包含'01003'&的行。

但我只當它不能找到hkx_row [2]隨時隨地wrhk_row [2]

Answer 1

做這個幫助你有興趣嗎？ ：

文件master.csv

Listed Company's English Name,Listed Company's Chinese Name,Stock Code,Listing Status,Director's English Name,Director's Chinese Name,Capacity,Position,Appointment Date (yyyy-mm-dd),Resignation Date (yyyy-mm-dd) 
C.P. Lotus Corporation,________,00122,Current,CHEARAVANONT Dhanin,___,Executive Director,,2009-12-31, 
C.P. Lotus Corporation,________,00121,Current,CHEARAVANON Narong,___,Executive Director,,2001-02-01, 
C.P. Lotus Corporation,________,00121,Current,CHEARAVANONT Soopakij,___,Executive Director,CEO,2000-04-14, 
C.P. Lotus Corporation,________,00123,Current,DEANINO James,___,Pilot,,2009-06-25, 
C.P. Lotus Corporation,________,00129,Current,GINGE Ivy,___,Dental Technician,,2010-07-27, 
C.P. Lotus Corporation,________,00127,Current,ERATOR Jane,___,Engineer,,2005-12-04, 
C.P. Lotus Corporation,________,00119,Current,FIELD Mary,___,Pastrycook,,2009-06-25, 

文件update.csv

Listed Company's English Name,Listed Company's Chinese Name,Stock Code,Listing Status,Director's English Name,Director's Chinese Name,Capacity,Position,Appointment Date (yyyy-mm-dd),Resignation Date (yyyy-mm-dd) 
C.P. Lotus Corporation,________,00133,Current,THOMPSON Sarah,___,Cosmonaut,,2004-01-20, 
C.P. Lotus Corporation,________,00122,Current,CHEARAVANONT Dhanin,___,Executive Director,,2009-12-31, 
C.P. Lotus Corporation,________,00121,Current,CHEARAVANON Narong,___,Executive Director,,2001-02-01, 
C.P. Lotus Corporation,________,00121,Current,BEARD Sophia,___,Executive Director,CEO,2010-04-26, 
C.P. Lotus Corporation,________,00127,Current,ERATOR Jane,___,Engineer,,2005-12-04, 
C.P. Lotus Corporation,________,00129,Current,MISTOUKI Hassan,___,Folk Singer,,2010-07-27, 

代碼

import csv 

mas = csv.reader(open('master.csv','rb')) 
upd = csv.reader(open('update.csv','rb')) 

set24 = set((row[2],row[4]) for row in mas) 
print set24 
print 

updkept = [ row for row in upd if (row[2],row[4]) not in set24] 
print '\n'.join(map(str,updkept)) 

結果

set([('00127', 'ERATOR Jane'), ('00121', 'CHEARAVANONT Soopakij'), ('00121', 'CHEARAVANON Narong'), ('00119', 'FIELD Mary'), ('00122', 'CHEARAVANONT Dhanin'), ('Stock Code', "Director's English Name"), ('00129', 'GINGE Ivy'), ('00123', 'DEANINO James')]) 

['C.P. Lotus Corporation', '________', '00133', 'Current', 'THOMPSON Sarah', '___', 'Cosmonaut', '', '2004-01-20', ''] 
['C.P. Lotus Corporation', '________', '00121', 'Current', 'BEARD Sophia', '___', 'Executive Director', 'CEO', '2010-04-26', ' '] 
['C.P. Lotus Corporation', '________', '00129', 'Current', 'MISTOUKI Hassan', '___', 'Folk Singer', '', '2010-07-27', '']