PyQt5打印机

1、打印机操作（打印默认文本里面的内容）
from PyQt5 import QtGui,QtWidgets,QtPrintSupport
from PyQt5.QtWidgets import *
import sys

class Printsupport1(QMainWindow):
    def __init__(self):
        super(Printsupport1,self).__init__()
        self.setGeometry(500,200,300,300)
        self.button=QPushButton("打印QtextEdit控件中的内容",self)
        self.button.setGeometry(20,60,260,200)
        self.editor=QTextEdit("默认文本",self)
        self.button.clicked.connect(self.print)

    def print(self):
 printer=QtPrintSupport.QPrinter()  #打印机

        painter=QtGui.QPainter()
#将绘制的目标重新定向到打印机
 painter.begin(printer)
        screen=self.editor.grab()
        painter.drawPixmap(10,10,screen)
        painter.end()
        print("print")

if __name__=="__main__":
    app=QApplication(sys.argv)
    p=Printsupport1()
    p.show()
    sys.exit(app.exec_())

2、显示打印样式设置对话框
from PyQt5.QtPrintSupport import QPageSetupDialog,QPrintDialog,QPrinter
from PyQt5.QtWidgets import *
import sys

class Printdialog(QMainWindow):
    def __init__(self):
        super(Printdialog,self).__init__()
self.printer=QPrinter()  #定义一个默认的打印机
        self.initUI()

    def initUI(self):
        self.setGeometry(300,300,500,400)
        self.setWindowTitle("打印对话框")
        self.editor=QTextEdit(self)
        self.editor.setGeometry(20,20,300,270)

        self.openbutton=QPushButton("打开文件",self)
        self.openbutton.move(350,20)

        self.settingbutton=QPushButton("打印设置",self)
        self.settingbutton.move(350,50)

        self.printbutton=QPushButton("打印文档",self)
        self.printbutton.move(350,80)

        self.openbutton.clicked.connect(self.openfile)
        self.settingbutton.clicked.connect(self.showsettingdailog)
        self.printbutton.clicked.connect(self.showprintdialog)
#打开文件
    def openfile(self):
        fname=QFileDialog.getOpenFileName(self,"打开文本文件","./")
        if fname[0]:
            with open(fname[0],"r",encoding='utf-8',errors='ignore') as f:
                self.editor.setText(f.read())

 #显示打印设置对话框
    def showsettingdailog(self):
        printerdailog=QPageSetupDialog(self.printer,self)
        printerdailog.exec()

 #显示打印对话框
    def showprintdialog(self):
        print1=QPrintDialog(self.printer,self)
        if QDialog.Accepted==print1.exec():
            self.editor.print(self.printer)

if __name__=="__main__":
    app=QApplication(sys.argv)
    p=Printdialog()
    p.show()
    sys.exit(app.exec_())