通过Python以双工模式打印PDF文件 [英] Print PDF file in duplex mode via Python

问题描述

我有一个Python脚本，可以打印PDF文件.
该脚本可以使用win32api.ShellExecute()正常运行，但是一切都很好，但是现在，我需要打印包含双面内容的PDF文件，具体请参见用户手册.
我曾尝试在win32print中设置双面打印模式，但没有任何效果，打印机仍然在2张纸上为我的PDF打印2页，而不是在双面纸上打印2页. 打印机可以在其他应用程序中使用此模式，但是使用python脚本不能很好地工作. 这是我用来打印的代码的一部分:

I have an script in Python that prints PDF files.
The script works using win32api.ShellExecute() and everything is fine, but now, I need to print PDF files that have double sided content, user manuals in concrete.
I have tried setting the duplex mode in win32print, but nothing works, the printer still print 2 pages on 2 sheets for my PDF instead of two pages on a double sided sheet. The printer works with this mode in other applications, but with the python script doesn't work well. This is part of the code I used to print:

name = win32print.GetDefaultPrinter()
printdefaults = {"DesiredAccess": win32print.PRINTER_ALL_ACCESS}
handle = win32print.OpenPrinter(name, printdefaults)
level = 2
attributes = win32print.GetPrinter(handle, level)
attributes['pDevMode'].Duplex
attributes['pDevMode'].Duplex = 1
win32print.SetPrinter(handle, level, attributes, 0)
win32print.GetPrinter(handle, level)['pDevMode'].Duplex
win32api.ShellExecute(0,'print','file.pdf','.','/route',0)

有人知道为什么这行不通吗?谢谢.

Any idea why this doesn't works? Thanks.

推荐答案

尝试运行此代码:

import win32api
import win32print

name = win32print.GetDefaultPrinter()

#printdefaults = {"DesiredAccess": win32print.PRINTER_ACCESS_ADMINISTER}
printdefaults = {"DesiredAccess": win32print.PRINTER_ACCESS_USE}
handle = win32print.OpenPrinter(name, printdefaults)

level = 2
attributes = win32print.GetPrinter(handle, level)

print "Old Duplex = %d" % attributes['pDevMode'].Duplex

#attributes['pDevMode'].Duplex = 1    # no flip
#attributes['pDevMode'].Duplex = 2    # flip up
attributes['pDevMode'].Duplex = 3    # flip over

## 'SetPrinter' fails because of 'Access is denied.'
## But the attribute 'Duplex' is set correctly
try:
    win32print.SetPrinter(handle, level, attributes, 0)
except:
    print "win32print.SetPrinter: set 'Duplex'"

res = win32api.ShellExecute(0, 'print', 'test.pdf', None, '.', 0)

win32print.ClosePrinter(handle)

它适用于我的计算机:Windows 10，Python 2.7.14，pypiwin32-220

It works on my computer: Windows 10, Python 2.7.14, pypiwin32-220

注意:

1. 在我的计算机上PRINTER_ACCESS_ADMINISTER导致 OpenPrinter.
2. 在我的计算机上，SetPrinter失败，并显示访问被拒绝".但是双工"是 设置正确..

1. On my computer PRINTER_ACCESS_ADMINISTER causes 'Access is denied' in OpenPrinter.
2. On my computer SetPrinter fails with 'Access is denied'. But 'Duplex' is set correctly..

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