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From: eryk sun <eryksun@gmail.com>
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Subject: Re: Running lpr on windows from python
Date: Wed, 20 Apr 2016 22:10:47 -0500
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On Wed, Apr 20, 2016 at 9:58 AM, Tim Golden <mail@timgolden.me.uk> wrote:
> If it's not, then try copying the lpr.exe to c:\windows\syswow64 and try
> again. (Or to some other place to which you have access).

WOW64 in Windows 7+ has a virtual "SysNative" directory that accesses
the native 64-bit system directory:

    if '32bit' in platform.architecture():
        lpr = os.path.join(os.environ['SystemRoot'], 'SysNative', 'lpr.exe')
    else:
        lpr = os.path.join(os.environ['SystemRoot'], 'System32', 'lpr.exe')