这期内容当中小编将会给大家带来有关怎么在python3中使用PyQt5实现一个文档打印功能，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
python的数据类型：1. 数字类型，包括int（整型）、long（长整型）和float（浮点型）。2.字符串，分别是str类型和unicode类型。3.布尔型，Python布尔类型也是用于逻辑运算，有两个值：True（真）和False（假）。4.列表，列表是Python中使用最频繁的数据类型，集合中可以放任何数据类型。5. 元组，元组用”()”标识，内部元素用逗号隔开。6. 字典，字典是一种键值对的集合。7. 集合，集合是一个无序的、不重复的数据组合。
1、使用HTML和QTextDOcument打印文档
2、使用QTextCusor和QTextDocument打印文档
3、使用QPainter打印文档
使用Qpainter打印文档比QTextDocument需要更操心和复杂的计算，但是QPainter确实能够对输出赋予完全控制。
#!/usr/bin/env python3
import math
import sys
import html
from PyQt5.QtPrintSupport import QPrinter,QPrintDialog
from PyQt5.QtCore import (QDate, QRectF, Qt)
from PyQt5.QtWidgets import (QApplication,QDialog,
QHBoxLayout,QPushButton, QTableWidget, QTableWidgetItem,QVBoxLayout)
from PyQt5.QtGui import (QFont,QFontMetrics,QPainter,QTextCharFormat,
QTextCursor, QTextDocument, QTextFormat,
QTextOption, QTextTableFormat,
QPixmap,QTextBlockFormat)
import qrc_resources
from PyQt5.QtPrintSupport import QPrinter,QPrintDialog
from PyQt5.QtCore import (QDate, QRectF, Qt)
from PyQt5.QtWidgets import (QApplication,QDialog,
QHBoxLayout,QPushButton, QTableWidget, QTableWidgetItem,QVBoxLayout)
from PyQt5.QtGui import (QFont,QFontMetrics,QPainter,QTextCharFormat,
QTextCursor, QTextDocument, QTextFormat,
QTextOption, QTextTableFormat,
QPixmap,QTextBlockFormat)
import qrc_resources
DATE_FORMAT = "MMM d, yyyy"
class Statement(object):
def __init__(self, company, contact, address):
self.company = company
self.contact = contact
self.address = address
self.transactions = [] # List of (QDate, float) two-tuples
def balance(self):
return sum([amount for date, amount in self.transactions])
class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
self.printer = QPrinter()
self.printer.setPageSize(QPrinter.Letter)
self.generateFakeStatements()
self.table = QTableWidget()
self.populateTable()
cursorButton = QPushButton("Print via Q&Cursor")
htmlButton = QPushButton("Print via &HTML")
painterButton = QPushButton("Print via Q&Painter")
quitButton = QPushButton("&Quit")
buttonLayout = QHBoxLayout()
buttonLayout.addWidget(cursorButton)
buttonLayout.addWidget(htmlButton)
buttonLayout.addWidget(painterButton)
buttonLayout.addStretch()
buttonLayout.addWidget(quitButton)
layout = QVBoxLayout()
layout.addWidget(self.table)
layout.addLayout(buttonLayout)
self.setLayout(layout)
cursorButton.clicked.connect(self.printViaQCursor)
htmlButton.clicked.connect(self.printViaHtml)
painterButton.clicked.connect(self.printViaQPainter)
quitButton.clicked.connect(self.accept)
self.setWindowTitle("Printing")
def generateFakeStatements(self):
self.statements = []
statement = Statement("Consality", "Ms S. Royal",
"234 Rue Saint Hyacinthe, 750201, Paris")
statement.transactions.append((QDate(2007, 8, 11), 2342))
statement.transactions.append((QDate(2007, 9, 10), 2342))
statement.transactions.append((QDate(2007, 10, 9), 2352))
statement.transactions.append((QDate(2007, 10, 17), -1500))
statement.transactions.append((QDate(2007, 11, 12), 2352))
statement.transactions.append((QDate(2007, 12, 10), 2352))
statement.transactions.append((QDate(2007, 12, 20), -7500))
statement.transactions.append((QDate(2007, 12, 20), 250))
statement.transactions.append((QDate(2008, 1, 10), 2362))
self.statements.append(statement)
statement = Statement("Demamitur Plc", "Mr G. Brown",
"14 Tall Towers, Tower Hamlets, London, WC1 3BX")
statement.transactions.append((QDate(2007, 5, 21), 871))
statement.transactions.append((QDate(2007, 6, 20), 542))
statement.transactions.append((QDate(2007, 7, 20), 1123))
statement.transactions.append((QDate(2007, 7, 20), -1928))
statement.transactions.append((QDate(2007, 8, 13), -214))
statement.transactions.append((QDate(2007, 9, 15), -3924))
statement.transactions.append((QDate(2007, 9, 15), 2712))
statement.transactions.append((QDate(2007, 9, 15), -273))
#statement.transactions.append((QDate(2007, 11, 8), -728))
#statement.transactions.append((QDate(2008, 2, 7), 228))
#statement.transactions.append((QDate(2008, 3, 13), -508))
#statement.transactions.append((QDate(2008, 3, 22), -2481))
#statement.transactions.append((QDate(2008, 4, 5), 195))
self.statements.append(statement)
def populateTable(self):
headers = ["Company", "Contact", "Address", "Balance"]
self.table.setColumnCount(len(headers))
self.table.setHorizontalHeaderLabels(headers)
self.table.setRowCount(len(self.statements))
for row, statement in enumerate(self.statements):
self.table.setItem(row, 0, QTableWidgetItem(statement.company))
self.table.setItem(row, 1, QTableWidgetItem(statement.contact))
self.table.setItem(row, 2, QTableWidgetItem(statement.address))
item = QTableWidgetItem("$ {0:,.2f}".format(float(statement.balance())))
item.setTextAlignment(Qt.AlignRight|Qt.AlignVCenter)
self.table.setItem(row, 3, item)
self.table.resizeColumnsToContents()
def printViaHtml(self):
htmltext = ""
for statement in self.statements:
date = QDate.currentDate().toString(DATE_FORMAT)
address = html.escape(statement.address).replace(
",", "
")
contact = html.escape(statement.contact)
balance = statement.balance()
htmltext += (""
"Greasy Hands Ltd."
"
New Lombard Street"
"
London
WC13 4PX
{0}"
"{1}
Dear {2},
"
"The balance of your account is $ {3:,.2f}.").format(
date, address, contact, float(balance))
if balance < 0:
htmltext += ("
Please remit the "
"amount owing immediately.")
else:
htmltext += (" We are delighted to have done business "
"with you.")
htmltext += ("
"
""
"Transactions {0}"
"{1} "
"$ {3:,.2f}
"
"We hope to continue doing "
"business with you,
Yours sincerely,"
"
K. Longrey, Manager")
dialog = QPrintDialog(self.printer, self)
if dialog.exec_():
document = QTextDocument()
document.setHtml(htmltext)
document.print_(self.printer)
def printViaQCursor(self):
dialog = QPrintDialog(self.printer, self)
if not dialog.exec_():
return
logo = QPixmap(":/logo.png")
headFormat = QTextBlockFormat()
headFormat.setAlignment(Qt.AlignLeft)
headFormat.setTextIndent(
self.printer.pageRect().width() - logo.width() - 216)
bodyFormat = QTextBlockFormat()
bodyFormat.setAlignment(Qt.AlignJustify)
lastParaBodyFormat = QTextBlockFormat(bodyFormat)
lastParaBodyFormat.setPageBreakPolicy(
QTextFormat.PageBreak_AlwaysAfter)
rightBodyFormat = QTextBlockFormat()
rightBodyFormat.setAlignment(Qt.AlignRight)
headCharFormat = QTextCharFormat()
headCharFormat.setFont(QFont("Helvetica", 10))
bodyCharFormat = QTextCharFormat()
bodyCharFormat.setFont(QFont("Times", 11))
redBodyCharFormat = QTextCharFormat(bodyCharFormat)
redBodyCharFormat.setForeground(Qt.red)
tableFormat = QTextTableFormat()
tableFormat.setBorder(1)
tableFormat.setCellPadding(2)
document = QTextDocument()
cursor = QTextCursor(document)
mainFrame = cursor.currentFrame()
page = 1
for statement in self.statements:
cursor.insertBlock(headFormat, headCharFormat)
cursor.insertImage(":/logo.png")
for text in ("Greasy Hands Ltd.", "New Lombard Street",
"London", "WC13 4PX",
QDate.currentDate().toString(DATE_FORMAT)):
cursor.insertBlock(headFormat, headCharFormat)
cursor.insertText(text)
for line in statement.address.split(", "):
cursor.insertBlock(bodyFormat, bodyCharFormat)
cursor.insertText(line)
cursor.insertBlock(bodyFormat)
cursor.insertBlock(bodyFormat, bodyCharFormat)
cursor.insertText("Dear {0},".format(statement.contact))
cursor.insertBlock(bodyFormat)
cursor.insertBlock(bodyFormat, bodyCharFormat)
balance = statement.balance()
cursor.insertText("The balance of your account is $ {0:,.2f}.".format(float(balance)))
if balance < 0:
cursor.insertBlock(bodyFormat, redBodyCharFormat)
cursor.insertText("Please remit the amount owing "
"immediately.")
else:
cursor.insertBlock(bodyFormat, bodyCharFormat)
cursor.insertText("We are delighted to have done "
"business with you.")
cursor.insertBlock(bodyFormat, bodyCharFormat)
cursor.insertText("Transactions:")
table = cursor.insertTable(len(statement.transactions), 3,
tableFormat)
row = 0
for date, amount in statement.transactions:
cellCursor = table.cellAt(row, 0).firstCursorPosition()
cellCursor.setBlockFormat(rightBodyFormat)
cellCursor.insertText(date.toString(DATE_FORMAT),
bodyCharFormat)
cellCursor = table.cellAt(row, 1).firstCursorPosition()
if amount > 0:
cellCursor.insertText("Credit", bodyCharFormat)
else:
cellCursor.insertText("Debit", bodyCharFormat)
cellCursor = table.cellAt(row, 2).firstCursorPosition()
cellCursor.setBlockFormat(rightBodyFormat)
format = bodyCharFormat
if amount < 0:
format = redBodyCharFormat
cellCursor.insertText("$ {0:,.2f}".format(float(amount)), format)
row += 1
cursor.setPosition(mainFrame.lastPosition())
cursor.insertBlock(bodyFormat, bodyCharFormat)
cursor.insertText("We hope to continue doing business "
"with you,")
cursor.insertBlock(bodyFormat, bodyCharFormat)
cursor.insertText("Yours sincerely")
cursor.insertBlock(bodyFormat)
if page == len(self.statements):
cursor.insertBlock(bodyFormat, bodyCharFormat)
else:
cursor.insertBlock(lastParaBodyFormat, bodyCharFormat)
cursor.insertText("K. Longrey, Manager")
page += 1
document.print_(self.printer)
def printViaQPainter(self):
dialog = QPrintDialog(self.printer, self)
if not dialog.exec_():
return
LeftMargin = 72
sansFont = QFont("Helvetica", 10)
sansLineHeight = QFontMetrics(sansFont).height()
serifFont = QFont("Times", 11)
fm = QFontMetrics(serifFont)
DateWidth = fm.width(" September 99, 2999 ")
CreditWidth = fm.width(" Credit ")
AmountWidth = fm.width(" W999999.99 ")
serifLineHeight = fm.height()
logo = QPixmap(":/logo.png")
painter = QPainter(self.printer)
pageRect = self.printer.pageRect()
page = 1
for statement in self.statements:
painter.save()
y = 0
x = pageRect.width() - logo.width() - LeftMargin
painter.drawPixmap(x, 0, logo)
y += logo.height() + sansLineHeight
painter.setFont(sansFont)
painter.drawText(x, y, "Greasy Hands Ltd.")
y += sansLineHeight
painter.drawText(x, y, "New Lombard Street")
y += sansLineHeight
painter.drawText(x, y, "London")
y += sansLineHeight
painter.drawText(x, y, "WC13 4PX")
y += sansLineHeight
painter.drawText(x, y,
QDate.currentDate().toString(DATE_FORMAT))
y += sansLineHeight
painter.setFont(serifFont)
x = LeftMargin
for line in statement.address.split(", "):
painter.drawText(x, y, line)
y += serifLineHeight
y += serifLineHeight
painter.drawText(x, y, "Dear {0},".format(statement.contact))
y += serifLineHeight
balance = statement.balance()
painter.drawText(x, y, "The balance of your account is $ {0:,.2f}".format(float(balance)))
y += serifLineHeight
if balance < 0:
painter.setPen(Qt.red)
text = "Please remit the amount owing immediately."
else:
text = ("We are delighted to have done business "
"with you.")
painter.drawText(x, y, text)
painter.setPen(Qt.black)
y += int(serifLineHeight * 1.5)
painter.drawText(x, y, "Transactions:")
y += serifLineHeight
option = QTextOption(Qt.AlignRight|Qt.AlignVCenter)
for date, amount in statement.transactions:
x = LeftMargin
h = int(fm.height() * 1.3)
painter.drawRect(x, y, DateWidth, h)
painter.drawText(
QRectF(x + 3, y + 3, DateWidth - 6, h - 6),
date.toString(DATE_FORMAT), option)
x += DateWidth
painter.drawRect(x, y, CreditWidth, h)
text = "Credit"
if amount < 0:
text = "Debit"
painter.drawText(
QRectF(x + 3, y + 3, CreditWidth - 6, h - 6),
text, option)
x += CreditWidth
painter.drawRect(x, y, AmountWidth, h)
if amount < 0:
painter.setPen(Qt.red)
painter.drawText(
QRectF(x + 3, y + 3, AmountWidth - 6, h - 6),
"$ {0:,.2f}".format(float(amount)),
option)
painter.setPen(Qt.black)
y += h
y += serifLineHeight
x = LeftMargin
painter.drawText(x, y, "We hope to continue doing "
"business with you,")
y += serifLineHeight
painter.drawText(x, y, "Yours sincerely")
y += serifLineHeight * 3
painter.drawText(x, y, "K. Longrey, Manager")
x = LeftMargin
y = pageRect.height() - 72
painter.drawLine(x, y, pageRect.width() - LeftMargin, y)
y += 2
font = QFont("Helvetica", 9)
font.setItalic(True)
painter.setFont(font)
option = QTextOption(Qt.AlignCenter)
option.setWrapMode(QTextOption.WordWrap)
painter.drawText(
QRectF(x, y, pageRect.width() - 2 * LeftMargin, 31),
"The contents of this letter are for information "
"only and do not form part of any contract.",
option)
page += 1
if page <= len(self.statements):
self.printer.newPage()
painter.restore()
if __name__ == "__main__":
app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_() 上述就是小编为大家分享的怎么在python3中使用PyQt5实现一个文档打印功能了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联成都网站设计公司行业资讯频道。
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