Python静默打印PDF到特定的打印机

根据之前的回答和其他帖子，我开发了以下脚本，从Laravel网站打印 .pdf 和 .ps 。

I used python 3.9 and Ghostscript 9.54 (for 64bits). pywin32 and python3-ghostscript libs are requiered too.

import os
import sys
import win32print
import win32api
import ghostscript
import locale
USELESS_PRINTER = ['OneNote for Windows 10', 'OneNote (Desktop)', 'Microsoft XPS Document Writer',
                   'Microsoft Print to PDF', 'Fax']
HELP = """pyPrinter - Author: Arthur SICARD - Date: 19/05/2021
\n-help
\tDisplay this message.
\n-list [-virtual]
\tReturn list of available printer (excepted: """ + ", ".join(USELESS_PRINTER) + """)
\n-file filepath [-printer printer_name] [-virtual]
\tPrint specified file on default system printer. Use -printer to specify printer to use. Printer name must be available un -list response.
\n-batch filepath [-printer printer_name] [-virtual]
\tPrint each document specified un batch file on default system printer. Batch file must be a .txt. Each file to print must be write on its own line.
\tUse -printer to specify printer to use. Printer name must be available un -list response.
\n-virtual
\tUse this option after all other arguments to enable printing on virtual printer 'Microsoft Print to PDF'
# Safe accessor to argv. Return None if index is not set
def getArgv(index):
        return (sys.argv[1:])[index]
    except:
        return None
# Return list of local printer available without "virtual printer" define in USELESS_PRINTER list.
def getAvailablePrinters():
    printers = win32print.EnumPrinters(win32print.PRINTER_ENUM_LOCAL)
    printer_list = []
    for x in range(len(printers)):
        if printers[x][2] not in USELESS_PRINTER:
            printer_list.append(printers[x][2])
    return printer_list
# Return printer name to use. If -printer is set it will return this value only if value match with available
# printers list. Return a error if -printer not in list. If no printer specified, retrieve default printer and return
# its name. Sometime default printer is on USELESS_PRINTER list so first printer return by getAvailablePrinters() is
# return. If no printer is return display an error.
def getPrinter():
    default_printer = win32print.GetDefaultPrinter()
    if default_printer in USELESS_PRINTER:
        if len(getAvailablePrinters()) == 0:
            print("No printer available, unable to print. Use -virtual if you want enable virtual printer.")
            sys.exit(1801)
        default_printer = getAvailablePrinters()[0]
    if getArgv(2) is not None:
        if getArgv(2) == "-printer":
            printer = getArgv(3)
            if printer in getAvailablePrinters():
                return printer
            else:
                if printer is not None:
                    print("Given printer not found. Defaut printer configured: ", default_printer)
    return default_printer
# Use GhostScript API to silent print .pdf and .ps. Use win32api to print .txt. Return a error if printing failed or
# file ext doesn't match.
def printFile(filepath):
        if os.path.splitext(filepath)[1] in [".pdf", ".ps"]:
            args = [
                "-dPrinted", "-dBATCH", "-dNOSAFER", "-dNOPAUSE", "-dNOPROMPT"
                                                                  "-q",
                "-dNumCopies#1",
                "-sDEVICE#mswinpr2",
                f'-sOutputFile#"%printer%{getPrinter()}"',
                f'"{filepath}"'
            encoding = locale.getpreferredencoding()
            args = [a.encode(encoding) for a in args]
            ghostscript.Ghostscript(*args)
        elif os.path.splitext(filepath)[1] in [".txt"]:
            # '"%s"' % enable to encapsulate string with quote
            win32api.ShellExecute(0, "printto", '"%s"' % filepath, '"%s"' % getPrinter(), ".", 0)
        return True
    except:
        print("Printing error for file: ", '"%s"' % filepath, "| Printer: ", '"%s"' % getPrinter())
        return False
def main(argv):
    if len(argv) in [1, 2, 4, 5]:
        cmd1 = getArgv(0)
        filepath = getArgv(1)
        if argv[-1] == "-virtual":
            USELESS_PRINTER.remove('Microsoft Print to PDF')
        # Batch printing mode
        if cmd1 == "-batch" and len(argv) in [2, 4, 5]:
            if not os.path.isfile(filepath) and not os.path.exists(filepath):
                print("Path provide for batch file is not a valid file path or doesn't exist.")
                sys.exit(2)
            if os.path.splitext(filepath)[1] in [".txt"]:
                with open(filepath) as fp:
                    line = fp.readline().strip('\n')
                    while line:
                        if not os.path.isfile(line) and not os.path.exists(line):
                            print("Path provide is not a valid file path or doesn't exist: ", line)
                        else:
                            printFile(line)
                        line = fp.readline().strip('\n')
                fp.close()
            else:
                print("Not supported file format for batch printing.")
                sys.exit(50)
        # Single file printing mode
        elif cmd1 == "-file" and len(argv) in [2, 4, 5]:
            if not os.path.isfile(filepath) and not os.path.exists(filepath):
                print("Path provide is not a file path.")
                sys.exit(2)
            if not printFile(filepath):
                sys.exit(1)
        # Get printers list
        elif cmd1 == "-list" and len(argv) in [1, 2]:
            for printer in getAvailablePrinters():
                print(printer)
        # Display help
        elif cmd1 == "-help" and len(argv) in [1]:
            print(HELP)
            sys.exit(0)
        else:
            print("Unknow option. Use -help to obtain more informations about supported options.")
            sys.exit(50)
    else:
        print("Wrong arguments number. Use -help to obtain more informations about supported options.")
        sys.exit(50)
    exit(0)
if __name__ == '__main__':
    main(sys.argv[1:])
下面的命令解释了如何使用它。
【替换代码7
pyPrinter - Author: Arthur - Date: 19/05/2021
-help
    Display this message.
-list [-virtual]
    Return list of available printer (excepted: OneNote for Windows 10, OneNote (Desktop), Microsoft XPS Document Writer, Microsoft Print to PDF, Fax)
-file filepath [-printer printer_name] [-virtual]
    Print specified file on default system printer. Use -printer to specify printer to use. Printer name must be available un -list response.
-batch filepath [-printer printer_name] [-virtual]
    Print each document specified un batch file on default system printer. Batch file must be a .txt. Each file to print must be write on its own line.
    Use -printer to specify printer to use. Printer name must be available un -list response.
-virtual
    Use this option after all other arguments to enable printing on virtual printer 'Microsoft Print to PDF'
To print one file to printer HP1FF6CC (HP OfficeJet Pro 6970)
python main.py -file "D:\my\system\path\to\file\pattern.ps" -printer "HP1FF6CC (HP OfficeJet Pro 6970)"
打印一个文件到虚拟打印机 Microsoft Print to PDF（一般用于文本目的，纸张很快就会很贵）。
python main.py -file "D:\my\system\path\to\file\pattern.ps" -printer "Microsoft Print to PDF" -virtual