Print data in a printer from python in windows

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Print data in a printer from python in windows

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#1 by (1 votes)

1

I'm doing some research on how to print data to a local printer from Python on Windows.

If you have the document and its route, a simple way that I found was this:

import os
os.startfile("C:/Users/Jdash/Desktop/TestFile.txt", "print")

However, what I want is to send the text string directly, without having to create the document.

This Windows Printing Via Python code seems to achieve what I want:

# create a dc (Device Context) object (actually a PyCDC)
dc = win32ui.CreateDC()

# convert the dc into a "printer dc"

# get default printer
printername = win32print.GetDefaultPrinter ()
# leave out the printername to get the default printer automatically
dc.CreatePrinterDC(printername)

# you need to set the map mode mainly so you know how
# to scale your output.  I do everything in points, so setting
# the map mode as "twips" works for me.
dc.SetMapMode(win32con.MM_TWIPS) # 1440 per inch

# here's that scaling I mentioned:
scale_factor = 20 # i.e. 20 twips to the point

# start the document.  the description variable is a string
# which will appear in the print queue to identify the job.
dc.StartDoc('Win32print test')

# to draw anything (other than text) you need a pen.
# the variables are pen style, pen width and pen color.
pen = win32ui.CreatePen(0, int(scale_factor), 0)

# SelectObject is used to apply a pen or font object to a dc.
dc.SelectObject(pen)

# how about a font?  Lucida Console 10 point.
# I'm unsure how to tell if this failed.
font = win32ui.CreateFont({
    "name": "Lucida Console",
    "height": int(scale_factor * 10),
    "weight": 400,
})

# again with the SelectObject call.
dc.SelectObject(font)

# okay, now let's print something.
# TextOut takes x, y, and text values.
# the map mode determines whether y increases in an
# upward or downward direction; in MM_TWIPS mode, it
# advances up, so negative numbers are required to
# go down the page.  If anyone knows why this is a
# "good idea" please email me; as far as I'm concerned
# it's garbage.
dc.TextOut(scale_factor * 72,
    -1 * scale_factor * 72,
    "Testing...")

# must not forget to tell Windows we're done.
dc.EndDoc()

My question is, what other ways are there to get printed from Python in Windows that allows you to send the text string directly?

Or maybe I'm getting complicated and the creation of the document goes unnoticed?

python windows

asked by Javier Cárdenas 14.02.2016 в 17:58

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1 answer

Handling fields (multiple selections) with values that depend on a value in a previous field - Django AngularJS with Karma, Node.js and Jasmine

score 1 · Accepted Answer

One way to print directly is using win32print . Here there are several examples where it also shows other ways to print text, pdf files, images etc., from Python in Windows. But what you're looking for, it seems, is the following:

import os, sys
import win32print

printer_name = win32print.GetDefaultPrinter ()

if sys.version_info >= (3,):
  raw_data = bytes ("This is a test", "utf-8")
else:
  raw_data = "This is a test"

hPrinter = win32print.OpenPrinter (printer_name)
try:
  hJob = win32print.StartDocPrinter (hPrinter, 1, ("Test de datos en bruto", None, "RAW"))
  try:
    win32print.StartPagePrinter (hPrinter)
    win32print.WritePrinter (hPrinter, raw_data)
    win32print.EndPagePrinter (hPrinter)
  finally:
    win32print.EndDocPrinter (hPrinter)
finally:
  win32print.ClosePrinter (hPrinter)

Here is another example that seems to be more universal. Tested on two different printers. (The one above only worked in one)

import win32ui
import win32print
import win32con

INCH = 1440

hDC = win32ui.CreateDC ()
hDC.CreatePrinterDC (win32print.GetDefaultPrinter ())
hDC.StartDoc ("Test doc")
hDC.StartPage ()
hDC.SetMapMode (win32con.MM_TWIPS)
hDC.DrawText ("TEST", (0, INCH * -1, INCH * 8, INCH * -2), win32con.DT_CENTER)
hDC.EndPage ()
hDC.EndDoc ()

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