Change font size with cups and python

Question

I print a txt file with cups and python. How do I change the font size?

conn = cups.Connection()
printers = conn.getPrinters()
printer_name = list(printers.keys())[0]
conn.printFile(printer_name,'file.txt','',{})

Answer 1

Try the following, it worked for me...

conn.printFile(printer_name,'file.txt','',{'landscape':'True', 'cpi':'14', 'lpi':'10'})

BTW I added the 'landscape':'True' to show that you can pass additional info in case needed