Python - 寫入標題一次 - 循環無法正常工作

我正在嘗試使用標題和明細行編寫「訂單文件」。我成功地將訂單標題寫入文件，但只有一條細節行似乎寫入文件。Python - 寫入標題一次 - 循環無法正常工作

for k, v in atlantic_billing.iteritems(): 
    XHORNO = str(digits + counter) 
    XHCSNO = k 
    print XHCSNO 
    machines = v 
    line = 1 
    counter = counter + 1 
    header_written = False 
    try : 
     for machine in machines : 
      XDORNO = XHORNO 
      XDORSQ = line 
      line = line + 1 
      XDITD1 = ranpak_dict[machine]['MODEL'] 
      XDITD2 = ranpak_dict[machine]['SN'] 
      XDCAVC = ranpak_dict[machine]['TOTAL'] 
      print XDORSQ, XDITD1, XDITD2, XDCAVC 
      if XDCAVC > 0 : 
       if header_written == False : 
        with open(XHORNO + ".txt", 'w') as order: 
         order.write("H01, " + XHORNO + ", " + XHCSNO + "\n") 
         order.write("D01," + str(XDORSQ) + ", " + ' EQPRANUSER, ' + XDITD1 + ", " + XDITD2 + ", " + XDCAVC + "\n") 
       else : 
        order.write("D01," + str(XDORSQ) + ", " + ' EQPRANUSER, ' + XDITD1 + ", " + XDITD2 + ", " + XDCAVC + "\n") 
        success.append(machine) 
        header_written = True 

    except KeyError, e: 
     issues.append(machine)

來源

2016-02-08 AlliDeacon

我想你想做的事'開放（XHORNO + 「.TXT」「w」）作爲順序：'在機器的開始之前''machine：'循環。另外，我會在'if header_written == False：'塊中放置'header_written = True'。 –

@DavidCullen如果我將'open（XHORNO +「txt」，「a」）'移動到'for machine in machine：'循環之前，它會寫入文件，然後我才能驗證任何行是可計費的？ – AlliDeacon

它將創建該文件，但在調用'order.write'之前不會寫任何內容。這聽起來不像你想要的行爲。然而，在'if'語句中放置'open'（XHORNO +「.txt」，'w'）作爲命令：'幾乎可以肯定不是你想要的行爲，因爲'order'在' if語句（在'else'語句之前）。也許你應該在行列表中收集每臺機器的數據，然後在'machine for machine：'循環中寫入行列表後，如果行列表的長度大於零。 –

打開文件時，你應該使用模式"A"否則文件將在每個循環（一次又一次）覆蓋：

with open(XHORNO + ".txt", 'a') as order: 
    ...

看到https://docs.python.org/3/library/functions.html#open

的另一種選擇是通過for塊取with塊。

來源

2016-02-08 15:10:25 Antoine

這讓我所有的細節線條，非常感謝！現在它反覆@Antoine編寫標題級別。我不知道是否將塊移動到for塊將工作，BC我試圖只寫有有效的非0行的文件。關於這個困境的任何想法？ – AlliDeacon

也許使用len（）函數在首次寫入之前檢查行的長度。然後在使用os.path.exists（）（請參閱https://docs.python.org/3/library/os.path.html#os.path.exists）再次寫入之前檢查文件的存在。 – Antoine

您需要打開該文件只有一次，而不是在循環中

for k, v in atlantic_billing.iteritems(): 
    XHORNO = str(digits + counter) 
    with open(XHORNO + ".txt", 'w') as order: # <--- here you go 
     XHCSNO = k 
     print XHCSNO 
     machines = v 
     line = 1 
     counter = counter + 1 
     header_written = False 
     try : 
      for machine in machines : 
       XDORNO = XHORNO 
       XDORSQ = line 
       line = line + 1 
       XDITD1 = ranpak_dict[machine]['MODEL'] 
       XDITD2 = ranpak_dict[machine]['SN'] 
       XDCAVC = ranpak_dict[machine]['TOTAL'] 
       print XDORSQ, XDITD1, XDITD2, XDCAVC 
       if XDCAVC > 0 : 
        if header_written == False : 

         order.write("H01, " + XHORNO + ", " + XHCSNO + "\n") 
         order.write("D01," + str(XDORSQ) + ", " + ' EQPRANUSER, ' + XDITD1 + ", " + XDITD2 + ", " + XDCAVC + "\n") 
        else : 
         order.write("D01," + str(XDORSQ) + ", " + ' EQPRANUSER, ' + XDITD1 + ", " + XDITD2 + ", " + XDCAVC + "\n") 
         success.append(machine) 
         header_written = True 

     except KeyError, e: 
      issues.append(machine)

來源

2016-02-08 15:12:13

我認爲你需要把'open'（XHORNO +「.txt」，'w'）作爲命令：'在machine：'loop中的機器之前。 XHORNO是一個在outer for循環內部變化的變量。 –

@DavidCullen - 你是正確的，修復和感謝！ –

試試這個：

for k, v in atlantic_billing.iteritems(): 
    XHORNO = str(digits + counter) 
    XHCSNO = k 
    print XHCSNO 
    machines = v 
    line = 1 
    counter = counter + 1 
    header_written = False 
    try : 
     for machine in machines : 
      XDORNO = XHORNO 
      XDORSQ = line 
      line = line + 1 
      XDITD1 = ranpak_dict[machine]['MODEL'] 
      XDITD2 = ranpak_dict[machine]['SN'] 
      XDCAVC = ranpak_dict[machine]['TOTAL'] 
      print XDORSQ, XDITD1, XDITD2, XDCAVC 
      if XDCAVC > 0 : 
       with open(XHORNO + ".txt", 'a') as order: 
        if header_written == False : 
         order.write("H01, " + XHORNO + ", " + XHCSNO + "\n") 
         order.write("D01," + str(XDORSQ) + ", " + ' EQPRANUSER, ' + XDITD1 + ", " + XDITD2 + ", " + XDCAVC + "\n") 
         header_written = True 
        else : 
         order.write("D01," + str(XDORSQ) + ", " + ' EQPRANUSER, ' + XDITD1 + ", " + XDITD2 + ", " + XDCAVC + "\n") 
         success.append(machine) 

    except KeyError, e: 
     issues.append(machine)

來源

2016-02-08 16:29:34

Python - 寫入標題一次 - 循環無法正常工作

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