用Python打开直排打印机

我有爱普生TM-U220B网络打印机和现金抽屉。我正在开发Python Web应用程序，我设法在我的应用程序上配置打印机。我的打印机工作正常，我只想打开直到我打印车票。我在网上找到了一些打开抽屉的密码

代码如下：

def print_(printer_name, file_path):
    preorder = chr(27)+chr(100)+chr(0)    
    cut_paper = chr(29)+chr(86)+chr(66)+chr(0)

    open_till = chr(27)+chr(112)+chr(10)

    the_file = open(file_path, "a")
    the_file.seek(0)
    the_file.write(preorder)
    the_file.seek(0,2)
    the_file.write(cut_paper)
    the_file.write(open_till)
    the_file.close()
    conn.printFile(printer_name, file_path, md5(file_path), {})

打开的代码是不工作，其他一切正常

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谢谢

您可以使用以下代码打开现金抽屉

import win32print

def OpenCashDrawer(printerName) :   
       printerHandler = win32print.OpenPrinter(printerName)
       cashDraweOpenCommand = chr(27)+chr(112)+chr(0)+chr(25)+chr(250)
       win32print.StartDocPrinter(printerHandler, 1, ('Cash Drawer Open',None,'RAW')) 
       win32print.WritePrinter( printerHandler, cashDraweOpenCommand)
       win32print.EndDocPrinter(printerHandler)
       win32print.ClosePrinter(printerHandler)

OpenCashDrawer("YourPrinterName")

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您可以使用以下代码打开现金抽屉

import win32print

def OpenCashDrawer(printerName) :   
       printerHandler = win32print.OpenPrinter(printerName)
       cashDraweOpenCommand = chr(27)+chr(112)+chr(0)+chr(25)+chr(250)
       win32print.StartDocPrinter(printerHandler, 1, ('Cash Drawer Open',None,'RAW')) 
       win32print.WritePrinter( printerHandler, cashDraweOpenCommand)
       win32print.EndDocPrinter(printerHandler)
       win32print.ClosePrinter(printerHandler)

OpenCashDrawer("YourPrinterName")

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尝试“wb”模式而不是“a”，并将打印机配置为接受命令。当我为open_输入代码直到打印机完全不打印时，控制代码为

27112,0,25250

，请尝试“wb”模式而不是“a”，并将打印机配置为接受命令。当我输入open_的代码直到打印机完全不打印时，控制代码为

27112,0,25250