Python silent print PDF to specific printer

I know this is an old question, but in case someone is looking for it here is how I fixed it.

I am using python 3.8 and gs9.52 on windows 10 64-bit and python3-ghostscript library which you can install using pip install python3-ghostscript I am also using pypiwin32 to get the default printer name, you can install it with pip pip install pypiwin32

This is the working script

import tempfile
import win32print
import locale
import ghostscript
import render_to_pdf

pdf = render_to_pdf('print/slip.html', context)
temp1 = tempfile.mktemp('.pdf')
f1 = open(temp1, 'ab')
f1.write(pdf)
f1.close()

args = [
        "-dPrinted", "-dBATCH", "-dNOSAFER", "-dNOPAUSE", "-dNOPROMPT"
        "-q",
        "-dNumCopies#1",
        "-sDEVICE#mswinpr2",
        f'-sOutputFile#"%printer%{win32print.GetDefaultPrinter()}"',
        f'"{temp1}"'
    ]

encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)

Few things to note here I am using '#' instead of '=' because for some reason it was not working with '='.

If this is not working for you try changing -sDEVICE switch to your printer type for example when I was using HP LaserJet it was giving me prompt so I changed my -sDEVICE to laserjet and it worked, you can get the list of device by running gs -h in terminal

Finally after hours and hours of searching for the right files, i have found the answer to my problem.

You can download the GSPRINT in HERE

You can download the Ghostscript GPL in HERE

With this extracted files in your PC (Windows) you can print your PDF with this command

GHOSTSCRIPT_PATH = "C:\\path\\to\\GHOSTSCRIPT\\bin\\gswin32.exe"
GSPRINT_PATH = "C:\\path\\to\\GSPRINT\\gsprint.exe"

# YOU CAN PUT HERE THE NAME OF YOUR SPECIFIC PRINTER INSTEAD OF DEFAULT
currentprinter = win32print.GetDefaultPrinter()

win32api.ShellExecute(0, 'open', GSPRINT_PATH, '-ghostscript "'+GHOSTSCRIPT_PATH+'" -printer "'+currentprinter+'" "PDFFile.pdf"', '.', 0)

The GhostScript can also be found in the Official page HERE

I found the gsprint.exe for 64bits HERE

I hope this helps.