Python内でCSVファイルを更新する

Question

私は現在CSVファイルを編集中です。作成してCSVファイルに追加すると、私は既存のCSVファイルに更新しようとしていますが、問題が発生しています。

コードを実行すると、次のエラーが表示されます。

/usr/bin/python3.5 /home/usr/PycharmProjects/csv/csv_file.py 
2016-11-12 00:04:03.975247 
2016-11-11 23:59:17.591426 
MOD TIME IS Different 
Traceback (most recent call last): 
    File "/home/usr/PycharmProjects/csv/csv_file.py", line 157, in <module> 
    Direcotry_function(sys.argv) 
    File "/home/usr/PycharmProjects/csv/csv_file.py", line 133, in Direcotry_function 
    for row in reader: 
    File "/usr/lib/python3.5/csv.py", line 109, in __next__ 
    self.fieldnames 
    File "/usr/lib/python3.5/csv.py", line 96, in fieldnames 
    self._fieldnames = next(self.reader) 
_csv.Error: iterator should return strings, not bytes (did you open the file in text mode?) 

Process finished with exit code 1 

以下は、私が働くように見えないPythonコードです。

def function(dest): 
    global directory_path #call the Global Variable 
    directory_path = os.getcwd() # getting Current Directory 
    if len(dest) > 1: 
     directory_path = dest 
    for list in filepath_list: 
     Originalfiles = ''.join(list)#Convert to Str 
     drive, path = os.path.splitdrive(Originalfiles)#Get the Path 
     path, filename = os.path.split(path)#Split the path and filename 
     makedir = path + '/' + filename 
     Originalfiles_Timestamp = os.path.getmtime(Originalfiles)#Get the Timestamp of File in seconds 
     mTime = datetime.datetime.fromtimestamp(Originalfiles_Timestamp)#Get the Date time in Month Yearformat 
     print(mTime) 
     if os.path.exists(os.path.join(directory_path, filename[:]+".copy")):#Check if the FIle exists 
      file_csv = csv.DictReader(open('datetime.csv'))#open CSV FILE 
      for row in file_csv:#Loop over 
       if row['FileName'] == Originalfiles: 
        rowTime = datetime.datetime.strptime(row['ModificationDate'], "%Y-%m-%d %H:%M:%S.%f") #Convert row to DateTime 
        print(rowTime) 
        if rowTime == mTime: #Check if Time inside CSV equals mTime 
         print("DATE IS THE SAME") 
         exit(1) 
        else:#if not equaled 
         print("MOD TIME IS Different") 
         global CSV_FILENAME 
         temp_file = NamedTemporaryFile(delete=False) 
         with open(CSV_FILENAME, "rb") as f, temp_file: 
          reader = csv.DictReader(f) 
          fieldnames = ['FileName', 'ModificationDate'] # Create Dict Keys 
          writer = csv.DictWriter(f, fieldnames=fieldnames) 
          for row in reader: 
           print(row) 
           writer.writerow({"FileName": row['FileName'], "ModificationDate": mTime}) 
          shutil(temp_file.name, CSV_FILENAME) 
         os.system('cp -rv ' + makedir + ' ' + directory_path + '/' + filename[:] + ".copy") 

       else: 
        with open('datetime.csv', 'a+') as f: 
         fieldnames = ['FileName', 'ModificationDate'] 
         writer = csv.DictWriter(f, fieldnames=fieldnames) 
         writer.writeheader()#WRITE KEYS 
         writer.writerow({'FileName': Originalfiles, 'ModificationDate': mTime})#WRITE Values 

     else: 
      #If Copy File Does not Exists in the Folder do the Following: 
      os.system('cp -r ' + makedir + ' ' + directory_path + '/' + filename[:]+".copy")#Copy ther File to the Directory 
      with open('datetime.csv', 'a+') as csvfile:#Open CSV File 
       fieldnames = ['FileName', 'ModificationDate']#Create Dict Keys 
       writer = csv.DictWriter(csvfile, fieldnames=fieldnames) 
       writer.writeheader() 
       writer.writerow({'FileName': Originalfiles, 'ModificationDate': mTime})#Write to The CSV File 

EDIT：コードで遊んで後にそう

：私は私が何かをチャゲ場合、それは全体datetime.csvを読んでいません直面しています問題点に働くこれをやった後です一つのファイルに私はそれがtemp.csv以内に私に

ファイル名をTEST1を与えていない、この を取得しています、ModificationDate /ホームは/ usr /デスクトップ/ test23,2016-11-12は、11：22：07.410170 ファイル名、ModificationDate /home/usr/Desktop/test23,2016-11-12 11：22：07.410170 ファイル名、ModificationDate /ホームは/ usr /デスクトップ/ test23,2016-11-12 11：22：07.410170

def Direcotry_function(directory_dest): 
    global directory_path #call the Global Variable 
    directory_path = os.getcwd() # getting Current Directory 
    if len(directory_dest) > 1: 
     directory_path = directory_dest 
    for list in filepath_list: 
     Originalfiles = ''.join(list)#Convert to Str 
     drive, path = os.path.splitdrive(Originalfiles)#Get the Path 
     path, filename = os.path.split(path)#Split the path and filename 
     makedir = path + '/' + filename 
     Originalfiles_Timestamp = os.path.getmtime(Originalfiles)#Get the Timestamp of File in seconds 
     mTime = datetime.datetime.fromtimestamp(Originalfiles_Timestamp)#Get the Date time in Month Yearformat 
     print(mTime) 
     print(filename) 
     if os.path.exists(os.path.join(directory_path, filename[:]+".copy")):#Check if the FIle exists 
      file_csv = csv.DictReader(open('datetime.csv'))#open CSV FILE 
      for row in file_csv:#Loop over 
       if row['FileName'] == Originalfiles: 
        rowTime = datetime.datetime.strptime(row['ModificationDate'], "%Y-%m-%d %H:%M:%S.%f") #Convert row to DateTime 
        if rowTime == mTime: #Check if Time inside CSV equals mTime 
         print("same") 
        else: 
         with open('datetime.csv', "r") as f: 
          reader = csv.DictReader(f) 
          fieldnames = ['FileName', 'ModificationDate'] # Create Dict Keys 
          for row in reader: 
           with open("temp.csv", 'w') as g: 
            writer = csv.DictWriter(g, fieldnames=fieldnames) 
            writer.writeheader() 
            writer.writerow({"FileName": Originalfiles, "ModificationDate": mTime}) 
          #shutil.move("temp.csv", 'datetime.csv') 
         os.system('cp -rv ' + makedir + ' ' + directory_path + '/' + filename[:] + ".copy") 
     else: 
      #If Copy File Does not Exists in the Folder do the Following: 
      os.system('cp -r ' + makedir + ' ' + directory_path + '/' + filename[:]+".copy")#Copy ther File to the Directory 
      with open('datetime.csv', 'a') as csvfile:#Open CSV File 
       fieldnames = ['FileName', 'ModificationDate']#Create Dict Keys 
       writer = csv.DictWriter(csvfile, fieldnames=fieldnames) 
       writer.writeheader() 
       writer.writerow({'FileName': Originalfiles, 'ModificationDate': mTime})#Write to The CSV File 

Answer 1

rbモードのみバイナリファイルで使用する必要があります。テキストファイルの場合は、rを使用してください。