PyQt5项目实训：简易电子词典

     PyQt5是python中一个非常实用的GUI编程模块，功能十分强大。刚刚学完了Pyqt的编程，就迫不及待的写出了一个电子词典GUI程序。整个程序使用qt Desiner把整个gui界面做好，槽函数则自己写好的。电子词典实现了查询单词，查询历史记录，收藏和查看单词本的功能，另外为了是程序更加炫酷，还添加了一个启动界面。具体代码如下：

     第一个为主程序代码，主要实现槽函数功能。

from PyQt5.QtCore import pyqtSlot
from PyQt5.QtWidgets import QMainWindow
from PyQt5 import  QtWidgets
from Ui_E_Dict_Main import Ui_E_Dictory
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import time, re

# 槽函数代码，运行程序需要运行本文件
class MainWindow(QMainWindow, Ui_E_Dictory):
    """
    Class documentation goes here.
    """
    def __init__(self, parent=None):
        """
        Constructor
        
        @param parent reference to the parent widget
        @type QWidget
        """
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
        # 启动时休眠1秒
        time.sleep(1)
    
    # 按钮1 查找单词,把单词显示在textBrowser的同时,插入历史记录
    @pyqtSlot()
    def on_pushButton_clicked(self):
        """
        Slot documentation goes here.
        """
        # 单词查询,需要先有一个'dict.txt'文件,其中有大量的英文单词和注释
        # 此处也可以先把'dict.txt'插入数据库,历史记录和单词本的插入和查询都可以直接操作数据库
        # 不过数据库需要事先安装数据库,并建立相应的表,不好打包,不太方便
        word=self.lineEdit.text()
        f=open('dict.txt', 'r')
        for line in f:
            # 对字典文件的数据进行分析,拆解为适合显示的格式
            l = re.split('[ ]+',line)
            if l[0]==word:
                interpret=' '.join(l[1:])
                data='%s\n  %s'%(l[0], interpret)
               # interpret='%s: %s'%(l[0],' '.join(l[1:]))
                self.textBrowser.setText(data)
                # 当地时间
                t1=time.localtime()
                t2=time.asctime(t1)
                #self.lineEdit.setText("")#lineEdit输入后清零,可要可不要
                try:
                    # 把所查询单词插入历史记录中，
                    #'a'以只写文件打开一个文件，如果有原文件则追加到文件末尾
                    file=open('history.txt', 'at')
                    msg='%s  %s'%(word, t2)
                    file.write(msg)
                    file.write('\n')
                    file.close()
                except Exception as e:
                    print(e)
        f.close()
            
                
    @pyqtSlot()
    def on_pushButton_2_clicked(self):
        """
        Slot documentation goes here.
        """
        try:
            # 查询历史记录,把历史记录显示在textBrowser中
            file=open('history.txt', 'rt')            
            list=file.readlines()
            msg=''.join(list)
            self.textBrowser.setText(msg)
            file.close()
        except Exception as e:
                    print(e)
                    
        
    @pyqtSlot()
    def on_pushButton_3_clicked(self):
        """
        Slot documentation goes here.
        """
        try:
            # 查询单词本,把单词本显示在textBrowser中
            file=open('words.txt', 'rt')            
            list=file.readlines()
            msg=''.join(list)
            self.textBrowser.setText(msg)
            file.close()
        except Exception as e:
                    print(e)
        

    
    @pyqtSlot()
    def on_pushButton_4_clicked(self):
        """
        Slot documentation goes here.
        """
        word=self.lineEdit.text()
        try:
            # 把所查询单词插入单词本中
            file=open('words.txt', 'at')
            file.write(word)
            file.write('\n')
            file.close()
        except Exception as e:
            print(e)      

        
        
if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    # 启动界面的实现,可以使程序更加炫酷
    splash=QtWidgets.QSplashScreen(QPixmap("Saved Pictures/5b517f520feaa.jpg"))
    # 启动界面显示
    splash.show()
    # 在启动界面中显示程序加载进度，参数意思分别为居中显示，蓝色字体
    splash.showMessage('正在加载图片资源', Qt.AlignCenter, Qt.blue)
    time.sleep(1)
    # 为了不与主程序干扰
    app.processEvents()
    ui = MainWindow()
    ui.show()
    # 启动界面完成
    splash.finish(ui)
    sys.exit(app.exec_())

    第二个程序代码，主要实现整体的GUI界面的构建（使用Qtdesiner可以极大的简化工作量，强烈推荐）

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_E_Dictory(object):
    def setupUi(self, E_Dictory):
        E_Dictory.setObjectName("E_Dictory")
        E_Dictory.resize(658, 474)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("icon/24-monitor.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        E_Dictory.setWindowIcon(icon)
        self.centralWidget = QtWidgets.QWidget(E_Dictory)
        self.centralWidget.setObjectName("centralWidget")
        self.pushButton = QtWidgets.QPushButton(self.centralWidget)
        self.pushButton.setGeometry(QtCore.QRect(390, 400, 91, 31))
        font = QtGui.QFont()
        font.setFamily("黑体")
        font.setPointSize(14)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName("pushButton")
        self.label_2 = QtWidgets.QLabel(self.centralWidget)
        self.label_2.setGeometry(QtCore.QRect(100, 400, 51, 31))
        font = QtGui.QFont()
        font.setFamily("黑体")
        font.setPointSize(14)
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")
        self.textBrowser = QtWidgets.QTextBrowser(self.centralWidget)
        self.textBrowser.setGeometry(QtCore.QRect(100, 110, 381, 271))
        self.textBrowser.setStyleSheet("background-color: rgb(242, 255, 233);")
        self.textBrowser.setObjectName("textBrowser")
        self.lineEdit = QtWidgets.QLineEdit(self.centralWidget)
        self.lineEdit.setGeometry(QtCore.QRect(160, 400, 211, 31))
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(10)
        self.lineEdit.setFont(font)
        self.lineEdit.setText("")
        self.lineEdit.setObjectName("lineEdit")
        self.label = QtWidgets.QLabel(self.centralWidget)
        self.label.setGeometry(QtCore.QRect(240, 60, 151, 31))
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(14)
        font.setBold(False)
        font.setWeight(50)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.pushButton_2 = QtWidgets.QPushButton(self.centralWidget)
        self.pushButton_2.setGeometry(QtCore.QRect(510, 140, 75, 23))
        self.pushButton_2.setObjectName("pushButton_2")
        self.pushButton_3 = QtWidgets.QPushButton(self.centralWidget)
        self.pushButton_3.setGeometry(QtCore.QRect(510, 220, 75, 23))
        self.pushButton_3.setObjectName("pushButton_3")
        self.pushButton_4 = QtWidgets.QPushButton(self.centralWidget)
        self.pushButton_4.setGeometry(QtCore.QRect(510, 310, 75, 23))
        self.pushButton_4.setObjectName("pushButton_4")
        self.graphicsView = QtWidgets.QGraphicsView(self.centralWidget)
        self.graphicsView.setGeometry(QtCore.QRect(0, 0, 661, 471))
        self.graphicsView.setStyleSheet("border-image: url(:/pic/Saved Pictures/f3cb924702022fc35eb6f865d67e23a6.jpg);")
        self.graphicsView.setObjectName("graphicsView")
        self.graphicsView.raise_()
        self.pushButton.raise_()
        self.label_2.raise_()
        self.textBrowser.raise_()
        self.lineEdit.raise_()
        self.label.raise_()
        self.pushButton_2.raise_()
        self.pushButton_3.raise_()
        self.pushButton_4.raise_()
        E_Dictory.setCentralWidget(self.centralWidget)

        self.retranslateUi(E_Dictory)
        QtCore.QMetaObject.connectSlotsByName(E_Dictory)

    def retranslateUi(self, E_Dictory):
        _translate = QtCore.QCoreApplication.translate
        E_Dictory.setWindowTitle(_translate("E_Dictory", "无道词典"))
        self.pushButton.setText(_translate("E_Dictory", "查找"))
        # 快捷键回车,可以使查找按钮发生效果
        self.pushButton.setShortcut(_translate("E_Dictory", "Return"))
        self.label_2.setText(_translate("E_Dictory", "单词："))
        # setHtml样式表可以按照自己喜好修改
        self.textBrowser.setHtml(_translate("E_Dictory", "\n"
"\n"
"

"))
        self.label.setText(_translate("E_Dictory", "查询单词"))
        self.pushButton_2.setText(_translate("E_Dictory", "历史记录"))
        self.pushButton_3.setText(_translate("E_Dictory", "单词本"))
        self.pushButton_4.setText(_translate("E_Dictory", "添加单词"))

import dict_rc

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    E_Dictory = QtWidgets.QMainWindow()
    ui = Ui_E_Dictory()
    ui.setupUi(E_Dictory)
    E_Dictory.show()
    sys.exit(app.exec_())

textBrowser中的内容可以以html的格式显示出来，所有其中的文件的显示可以按照自己的喜好来设计。