Re: Help wanted - Duplex printing

On 28/08/2026 02:30, dn via Python-list wrote:
> Rob,
>
>
> On 28/08/2026 00:08, Rob Cliffe via Python-list wrote:
>> I have a Windows 11 laptop and an Epson WF-4820 printer.
>> Is there any way I can programmatically print two files, one on each 
>> side of the same sheet of paper?
>> The following program doesn't quite work (Python 3.13.3):
>
> How long are these files?
In my tests, 1 line long each. 🙂
>
> In the ?good, old, days (before duplex printers became 
> available/cheap) we would print the even-numbered pages on the 
> 'bottom' of each sheet with page-numbering forwards, take the output 
> stack and (carefully oriented) place it back in the input cartridge; 
> then print the 'odd' pages on the 'top' of each sheet.
>
> In your case, print the shorter file, over-turn, and print the other.
>
> However...
> if any page is messed-up for some reason, eg two sheets fail to 
> separate; things become confusing very quickly. So, learned to use 
> this trick in short-runs.
>
> OTOH much more fun to find a programmatic solution!
Indeed.  But I'll just turn the paper over and feed it back in.
Best,
Rob
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