import os
import tempfile
  
temp = tempfile.mktemp(dir='/tmp')
with open(temp, 'w') as printer:
    printer.write('Hello World')
  
_ = os.system(`lpr {}`.format(temp))
os.unlink(temp)

#!/usr/bin/env python
# -*- coding: utf8 -*-
import sys
from PyQt4 import QtGui, QtWebKit
 
class Printer(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.setWindowTitle('Sample Printer')
        self.setMinimumSize(100, 100)
        self.print_button = QtGui.QPushButton('Print')
        self.close_button = QtGui.QPushButton('Close')
        self.layer = QtGui.QHBoxLayout(self)
        self.layer.addWidget(self.print_button, 0)
        self.layer.addWidget(self.close_button, 1)
        self.html = QtWebKit.QWebView()
        self.html.setHtml("<h1>Hello World</h1>")
        self.print_button.clicked.connect(self.printer)
        self.close_button.clicked.connect(self.close)
  
    def printer(self):
        self.qprinter = QtGui.QPrinter(QtGui.QPrinter.HighResolution)
        self.qprinter.setPageSize(QtGui.QPrinter.A4)
        self.qprinter.setOrientation(QtGui.QPrinter.Landscape)
        self.dialog = QtGui.QPrintPreviewDialog(self.qprinter)
        self.dialog.paintRequested.connect(self.print_preview)
        self.dialog.exec_()
  
    def print_preview(self):
        self.html.print_(self.qprinter)
  
if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    p = Printer()
    p.show()
    sys.exit(app.exec_())