Python绝对路径与相对路径读写文件【上级目录： os.path.dirname(os.getcwd())】

 

# coding:utf8'''知识点：Python读写文件时候的相对路径与绝对路径准备工作：先在同级目录下写一个test.txt文件，里面写汉字、字母、数字''''''一、用绝对路径读写'''# 第一种 with open() 【推荐】with open('C:\\Users\\Administrator\\desktop\\test.txt','r') as f:    print(f.read().decode('utf8'))  #注意编码# 第二种 with open()with open('C:/Users/Administrator/desktop/test.txt','r') as f:  #注：这里 \\ 等同于 /    print(f.read())     #试试不写编码格式会出现什么问题-.-# 第三种 open() + close() 【不推荐用这个，因为语句较长】file1 = open('C:\\Users\\Administrator\\desktop\\test.txt','r')print(file1.read().decode('utf8'))file1.close()# 补充：with open('C:\\Users\\Administrator\\desktop\\test.txt','w') as f:  #写入    f.write('测试test11')  #这样会替换原来全部文字'''二、用相对路径os.getcwd() #获取当前绝对路径os.path.dirname(os.getcwd())  #当前目录的上一级/父级目录'''# 读取上一级/父级目录中的文件import osBASE_DIR = os.getcwd()  #获取当前绝对路径 # print(u'当前绝对路径是：' + BASE_DIR)Father_BASE_DIR = os.path.dirname(os.getcwd())  #当前目录的上一级/父级目录# print(u'当前目录的父级目录是：' + Father_BASE_DIR)file_path = os.path.join(Father_BASE_DIR,'test.txt')  #获取当前文件夹下的Test_Data文件 with open(file_path,'r') as f:    print(f.read().decode('utf8'))

 

 

 

Python调用其他文件(夹)中的类

#coding:utf8'''说明：Python其他文件中类的调用目录结构如下:main.pypakage/mymodel.py'''# --------------------------------------------# main.py# coding:utf8from pakge.mymodel import mymodel.test  # 注：引用路径写法mylist= [1,2,3]a = test(mylist)a.prt()a.tplt()# --------------------------------------------# pakage/mymodel.py#coidng:utf8import matplotlib.pyplot as pltclass test(object):    num = []    def __init__(self, _list):        super(test, self).__init__()        self.num = _list    def prt(self):        print(self.num)    def tplt(self):        plt.plot(self.num)        plt.show()# mylist= [1,2,3]# a = test(mylist)# a.prt()# a.tplt()

 

Python分装成类

# Python 类的封装class Gun:    def __init__(self, model):        # 1. 枪的型号        self.model = model        # 2. 子弹的数量        self.bullet_count = 0    def add_bullet(self, count):        self.bullet_count += count    def shoot(self):        # 1. 判断字弹的数量        if self.bullet_count <= 0:            print("[%s] 没有字弹了..." % self.model)            return        # 2. 发射子弹        self.bullet_count -= 1        # 3. 提示发射信息        print("[%s] 突突突...子弹有： [%d]" % (self.model, self.bullet_count))# 创建枪对象ak47 = Gun('ak47')ak47.add_bullet(30)ak47.shoot()ak47.shoot()class Soldier:    def __init__(self, name):        self.name = name        self.gun = None    # 私有    def fire(self):        # 1. 判断士兵是否有枪        if self.gun is None:   # 身份运算符（is） 可以替换（==）            print("[%s] 还没有枪..." % self.name)            return        # 2. 口号        print("冲啊... [%s]" % self.name)        # 3. 装子弹        self.gun.add_bullet(30)        # 4. 发射子弹        self.gun.shoot()# 创建一个士兵jack = Soldier("jack")jack.gun = ak47jack.fire()print(jack.gun)类的封装

 

1.使用TensorFlow识别验证码

　　https://cuiqingcai.com/5709.html

 

2.Pyqt基础，写一个框

import sysfrom PyQt5.QtWidgets import QApplication,QMainWindow,QAction,QMessageBoxfrom PyQt5.QtGui import QIconclass myWin(QMainWindow):    def __init__(self):        super().__init__()        self.initUI()    def initUI(self):        #创建动作对象并设置        action_close=QAction(QIcon('icon.png'),'&退出',self)        action_close.setShortcut('A')        action_close.setStatusTip('这是退出功能')        action_close.triggered.connect(self.close)        action_open=QAction(QIcon('icon.png'),'&打开',self)        action_open.setShortcut('Ctrl+O')        action_open.setStatusTip('这是打开功能')        action_open.triggered.connect(self.open1)        #创建菜单        menuBar=self.menuBar()        menufile=menuBar.addMenu('&文件')        menufile.addAction(action_open)        menufile.addAction(action_close)        #设置状态栏        self.statusBar().showMessage('这个是状态栏....')        #设置窗口属性        self.setGeometry(100,300,400,400)        self.setWindowTitle('菜单栏实例')        self.setWindowIcon(QIcon('icon.png'))        self.show()    #重写关闭事件方法（closeEvent）    def closeEvent(self,event):        #获取消息框实例的值        msg=QMessageBox.question(self,'退出警告','你确认退出吗？？',QMessageBox.Yes | QMessageBox.No,QMessageBox.No)          #判定消息框的返回值        if msg==QMessageBox.Yes:            event.accept()        else:            event.ignore()    def open1(self):        print('马季是个相声家')if __name__=='__main__':    app=QApplication(sys.argv)    my=myWin()    sys.exit(app.exec_())Python_menuBar

 

 3.Pyqt5做俄罗斯方块,能运行

"""俄罗斯方块 author: wolfstarlast edited: 2018年1月"""import sys, randomfrom PyQt5.QtWidgets import QMainWindow, QFrame, QDesktopWidget, QApplicationfrom PyQt5.QtCore import Qt, QBasicTimer, pyqtSignalfrom PyQt5.QtGui import QPainter, QColor #主界面类 class Tetris(QMainWindow):    def __init__(self):        super().__init__()         self.initUI()     def initUI(self):        #Board创建一个面板类的实例，并设置应用程序的核心部件。        self.tboard = Board(self)        self.setCentralWidget(self.tboard)        #创建一个状态栏将显示消息。我们将显示三种可能的消息:已删除的行数,停顿了一下消息,或游戏结束的消息。msg2Statusbar是一个自定义的信号,在Board 中实现类。showMessage()是一个内置的方法,在状态栏显示一条消息。         self.statusbar = self.statusBar()        self.tboard.msg2Statusbar[str].connect(self.statusbar.showMessage)        #这一行代码启动游戏        self.tboard.start()         self.resize(180, 380)        self.center()        self.setWindowTitle('Tetris')        self.show()    #窗体居中显示方法     def center(self):        screen = QDesktopWidget().screenGeometry()        size = self.geometry()        self.move((screen.width() - size.width()) / 2,                  (screen.height() - size.height()) / 2) #创建面板类class Board(QFrame):    #创建一个自定义的信号。当我们想写一个信息或状态栏的分数的时候，msg2Statusbar发出一个信号    msg2Statusbar = pyqtSignal(str)    #这些都是Board的类变量。BoardWidth和BoardHeight定义的块的大小。Speed定义了游戏的速度。每个300 ms将开始一个新游戏循环。    BoardWidth = 10    BoardHeight = 22    Speed = 300     def __init__(self, parent):        super().__init__(parent)         self.initBoard()    #我们在initBoard()方法初始化一些重要的变量。board变量是一个从0到7的数字列表。它代表了面板上各种形状和位置。    def initBoard(self):                self.timer = QBasicTimer()        self.isWaitingAfterLine = False         self.curX = 0        self.curY = 0        self.numLinesRemoved = 0        self.board = []         self.setFocusPolicy(Qt.StrongFocus)        self.isStarted = False        self.isPaused = False        self.clearBoard()     #shapeAt()方法确定在给定形状块的类型。    def shapeAt(self, x, y):        return self.board[(y * Board.BoardWidth) + x]        def setShapeAt(self, x, y, shape):        self.board[(y * Board.BoardWidth) + x] = shape    #Board可以动态地调整大小。因此,块的大小可能会有所改变。squareWidth()计算单一方块像素的宽度并返回它。Board.BoardWidth方块板的大小。    def squareWidth(self):        return self.contentsRect().width() // Board.BoardWidth     def squareHeight(self):        return self.contentsRect().height() // Board.BoardHeight    #游戏开始方法    def start(self):         if self.isPaused:            return         self.isStarted = True        self.isWaitingAfterLine = False        self.numLinesRemoved = 0        self.clearBoard()         self.msg2Statusbar.emit(str(self.numLinesRemoved))         self.newPiece()        self.timer.start(Board.Speed, self)    #游戏暂停方法    def pause(self):         if not self.isStarted:            return         self.isPaused = not self.isPaused         if self.isPaused:            self.timer.stop()            self.msg2Statusbar.emit("paused")         else:            self.timer.start(Board.Speed, self)            self.msg2Statusbar.emit(str(self.numLinesRemoved))         self.update()    #窗体绘图    def paintEvent(self, event):         painter = QPainter(self)        #根据窗体舞台大小计算顶部        rect = self.contentsRect()         boardTop = rect.bottom() - Board.BoardHeight * self.squareHeight()        #游戏的绘制分为两个步骤，第一步，绘制所有方块，这些方块都要保存在底部列表中。列表通过shapeAt() 方法来添加方块。        for i in range(Board.BoardHeight):            for j in range(Board.BoardWidth):                shape = self.shapeAt(j, Board.BoardHeight - i - 1)                 if shape != Tetrominoe.NoShape:                    self.drawSquare(painter,                                    rect.left() + j * self.squareWidth(),                                    boardTop + i * self.squareHeight(), shape)        #第二步绘制下降中的方块        if self.curPiece.shape() != Tetrominoe.NoShape:             for i in range(4):                x = self.curX + self.curPiece.x(i)                y = self.curY - self.curPiece.y(i)                self.drawSquare(painter, rect.left() + x * self.squareWidth(),                                boardTop + (Board.BoardHeight - y - 1) * self.squareHeight(),                                self.curPiece.shape())     def keyPressEvent(self, event):         if not self.isStarted or self.curPiece.shape() == Tetrominoe.NoShape:            super(Board, self).keyPressEvent(event)            return         key = event.key()         if key == Qt.Key_P:            self.pause()            return         if self.isPaused:            return        #keyPressEvent()方法检查按下键。当按右箭头键,我们试图向右移动一块。我们使用tyrMove,因为可能无法移动。        elif key == Qt.Key_Left:            self.tryMove(self.curPiece, self.curX - 1, self.curY)         elif key == Qt.Key_Right:            self.tryMove(self.curPiece, self.curX + 1, self.curY)        #向上箭头键将旋转方块。        elif key == Qt.Key_Down:            self.tryMove(self.curPiece.rotateRight(), self.curX, self.curY)         elif key == Qt.Key_Up:            self.tryMove(self.curPiece.rotateLeft(), self.curX, self.curY)        #空格键立即下降到底部        elif key == Qt.Key_Space:            self.dropDown()        #按下D键，可以加速下降。        elif key == Qt.Key_D:            self.oneLineDown()         else:            super(Board, self).keyPressEvent(event)    #计时器事件,当我们前一个方块降到底部后，创建一个新的方块。    def timerEvent(self, event):         if event.timerId() == self.timer.timerId():             if self.isWaitingAfterLine:                self.isWaitingAfterLine = False                self.newPiece()            else:                self.oneLineDown()         else:            super(Board, self).timerEvent(event)    #clearBoard()方法通过设置Tetrominoe.NoShape清除面板    def clearBoard(self):         for i in range(Board.BoardHeight * Board.BoardWidth):            self.board.append(Tetrominoe.NoShape)     def dropDown(self):         newY = self.curY         while newY > 0:             if not self.tryMove(self.curPiece, self.curX, newY - 1):                break             newY -= 1         self.pieceDropped()     def oneLineDown(self):         if not self.tryMove(self.curPiece, self.curX, self.curY - 1):            self.pieceDropped()     def pieceDropped(self):         for i in range(4):            x = self.curX + self.curPiece.x(i)            y = self.curY - self.curPiece.y(i)            self.setShapeAt(x, y, self.curPiece.shape())         self.removeFullLines()         if not self.isWaitingAfterLine:            self.newPiece()    #如果到达底部,会调用removeFullLines()方法。我们会检查所有完整的线条然后删除它们。然后移动所有行高于当前删除整行一行。请注意,我们反的顺序行被删除。否则,就会出错。    def removeFullLines(self):         numFullLines = 0        rowsToRemove = []         for i in range(Board.BoardHeight):             n = 0            for j in range(Board.BoardWidth):                if not self.shapeAt(j, i) == Tetrominoe.NoShape:                    n = n + 1             if n == 10:                rowsToRemove.append(i)         rowsToRemove.reverse()         for m in rowsToRemove:             for k in range(m, Board.BoardHeight):                for l in range(Board.BoardWidth):                    self.setShapeAt(l, k, self.shapeAt(l, k + 1))         numFullLines = numFullLines + len(rowsToRemove)         if numFullLines > 0:            self.numLinesRemoved = self.numLinesRemoved + numFullLines            self.msg2Statusbar.emit(str(self.numLinesRemoved))             self.isWaitingAfterLine = True            self.curPiece.setShape(Tetrominoe.NoShape)            self.update()    #通过newPiece()方法创建一个新的方块，如果不能进入它的初始位置,游戏就结束了。    def newPiece(self):         self.curPiece = Shape()        self.curPiece.setRandomShape()        self.curX = Board.BoardWidth // 2 + 1        self.curY = Board.BoardHeight - 1 + self.curPiece.minY()         if not self.tryMove(self.curPiece, self.curX, self.curY):            self.curPiece.setShape(Tetrominoe.NoShape)            self.timer.stop()            self.isStarted = False            self.msg2Statusbar.emit("Game over")    #使用tryMove()方法尝试移动方块。如果方块的边缘已经接触到面板边缘或者不能移动,我们返回False。否则我们当前块下降到一个新的位置。    def tryMove(self, newPiece, newX, newY):         for i in range(4):             x = newX + newPiece.x(i)            y = newY - newPiece.y(i)             if x < 0 or x >= Board.BoardWidth or y < 0 or y >= Board.BoardHeight:                return False             if self.shapeAt(x, y) != Tetrominoe.NoShape:                return False         self.curPiece = newPiece        self.curX = newX        self.curY = newY        self.update()         return True     def drawSquare(self, painter, x, y, shape):         colorTable = [0x000000, 0xCC6666, 0x66CC66, 0x6666CC,                      0xCCCC66, 0xCC66CC, 0x66CCCC, 0xDAAA00]         color = QColor(colorTable[shape])        painter.fillRect(x + 1, y + 1, self.squareWidth() - 2,                         self.squareHeight() - 2, color)         painter.setPen(color.lighter())        painter.drawLine(x, y + self.squareHeight() - 1, x, y)        painter.drawLine(x, y, x + self.squareWidth() - 1, y)         painter.setPen(color.darker())        painter.drawLine(x + 1, y + self.squareHeight() - 1,                         x + self.squareWidth() - 1, y + self.squareHeight() - 1)        painter.drawLine(x + self.squareWidth() - 1,                         y + self.squareHeight() - 1, x + self.squareWidth() - 1, y + 1) #Tetrominoe类包含所有可能的形状。NoShape空形状。class Tetrominoe(object):    NoShape = 0    ZShape = 1    SShape = 2    LineShape = 3    TShape = 4    SquareShape = 5    LShape = 6    MirroredLShape = 7 #Shape 类保存方块信息  class Shape(object):    #coordsTable 元组包含所有可能的俄罗斯方块的坐标值。这是一个模板的所有块坐标值。    coordsTable = (        ((0, 0), (0, 0), (0, 0), (0, 0)),        ((0, -1), (0, 0), (-1, 0), (-1, 1)),        ((0, -1), (0, 0), (1, 0), (1, 1)),        ((0, -1), (0, 0), (0, 1), (0, 2)),        ((-1, 0), (0, 0), (1, 0), (0, 1)),        ((0, 0), (1, 0), (0, 1), (1, 1)),        ((-1, -1), (0, -1), (0, 0), (0, 1)),        ((1, -1), (0, -1), (0, 0), (0, 1))    )     def __init__(self):         self.coords = [[0, 0] for i in range(4)]        self.pieceShape = Tetrominoe.NoShape         self.setShape(Tetrominoe.NoShape)     def shape(self):        return self.pieceShape     def setShape(self, shape):         table = Shape.coordsTable[shape]         for i in range(4):            for j in range(2):                self.coords[i][j] = table[i][j]         self.pieceShape = shape     def setRandomShape(self):        self.setShape(random.randint(1, 7))     def x(self, index):        return self.coords[index][0]     def y(self, index):        return self.coords[index][1]     def setX(self, index, x):        self.coords[index][0] = x     def setY(self, index, y):        self.coords[index][1] = y     def minX(self):         m = self.coords[0][0]        for i in range(4):            m = min(m, self.coords[i][0])         return m     def maxX(self):         m = self.coords[0][0]        for i in range(4):            m = max(m, self.coords[i][0])         return m     def minY(self):         m = self.coords[0][1]        for i in range(4):            m = min(m, self.coords[i][1])         return m     def maxY(self):         m = self.coords[0][1]        for i in range(4):            m = max(m, self.coords[i][1])         return m    #rotateLeft() 向左旋转方块。如果方块本身不能被旋转，我们就返回当前对象的应用。否则就创建一个新的块及其坐标设置为的旋转。    def rotateLeft(self):         if self.pieceShape == Tetrominoe.SquareShape:            return self         result = Shape()        result.pieceShape = self.pieceShape         for i in range(4):            result.setX(i, self.y(i))            result.setY(i, -self.x(i))         return result     def rotateRight(self):         if self.pieceShape == Tetrominoe.SquareShape:            return self         result = Shape()        result.pieceShape = self.pieceShape         for i in range(4):            result.setX(i, -self.y(i))            result.setY(i, self.x(i))         return result  if __name__ == '__main__':    app = QApplication([])    tetris = Tetris()    sys.exit(app.exec_())

 

4.Pyqt5做计算器

#!/usr/bin/env python# -*- coding:UTF-8 -*-# calculatorimport sysfrom PyQt5.QtGui import *from PyQt5.QtCore import *class UI_form(QWidget):    def __init__(self,parent = None):             QWidget.__init__(self)             self.setWindowTitle('UI')             grid = QGridLayout() #网格式布局             global lcd             lcd = QTextBrowser()             lcd.setFixedHeight(90)             lcd.setFont(QFont("Microsoft YaHei", 20))             lcd.setText('0'.decode('utf-8'))             grid.setSpacing(0)             grid.addWidget(lcd, 0, 0, 1, 5)    # ---------------------按钮定义及显示-------------------------             button_0 = QPushButton('0')             grid.addWidget(button_0,5,0)             button_1 = QPushButton('1')             grid.addWidget(button_1,4,0)             button_2 = QPushButton('2')             grid.addWidget(button_2,4,1)             button_3 = QPushButton('3')             grid.addWidget(button_3,4,2)             button_4 = QPushButton('4')             grid.addWidget(button_4,3,0)             button_5 = QPushButton('5')             grid.addWidget(button_5,3,1)             button_6 = QPushButton('6')             grid.addWidget(button_6,3,2)             button_7 = QPushButton('7')             grid.addWidget(button_7,2,0)             button_8 = QPushButton('8')             grid.addWidget(button_8,2,1)             button_9 = QPushButton('9')             grid.addWidget(button_9,2,2)             button_plus = QPushButton('+')             grid.addWidget(button_plus,2,3)             button_dec = QPushButton('-')             grid.addWidget(button_dec,3,3)             button_mul = QPushButton('*')             grid.addWidget(button_mul,4,3)             button_dev = QPushButton('/')             grid.addWidget(button_dev,5,3)             button_eq = QPushButton('=')             grid.addWidget(button_eq,5,2)             button_point = QPushButton('.')             grid.addWidget(button_point,5,1)             button_close = QPushButton('Close')             grid.addWidget(button_close,1,0)             button_clear = QPushButton('Clear')             grid.addWidget(button_clear,1,1)             button_blk = QPushButton('Blk')             grid.addWidget(button_blk,1,2)#--------------------------------------------------             self.setLayout(grid)             self.resize(350, 300)             self.str1 = ''#接收第一个要运算的数             self.str2 = ''#接收第二个要运算的数             self.flag = '0'             self.calFlag = ''             lcd.setText(self.str1)             #数字键事件处理             QObject.connect(button_7,SIGNAL("clicked()"),self.func_button7)             QObject.connect(button_8,SIGNAL("clicked()"),self.func_button8)             QObject.connect(button_9,SIGNAL("clicked()"),self.func_button9)             QObject.connect(button_4,SIGNAL("clicked()"),self.func_button4)             QObject.connect(button_5,SIGNAL("clicked()"),self.func_button5)             QObject.connect(button_6,SIGNAL("clicked()"),self.func_button6)             QObject.connect(button_1,SIGNAL("clicked()"),self.func_button1)             QObject.connect(button_2,SIGNAL("clicked()"),self.func_button2)             QObject.connect(button_3,SIGNAL("clicked()"),self.func_button3)             QObject.connect(button_0,SIGNAL("clicked()"),self.func_button0)             #运算符按键事件处理             QObject.connect(button_plus,SIGNAL("clicked()"),self.func_buttonAdd)             QObject.connect(button_dec,SIGNAL("clicked()"),self.func_buttonDec)             QObject.connect(button_mul,SIGNAL("clicked()"),self.func_buttonMul)             QObject.connect(button_dev,SIGNAL("clicked()"),self.func_buttonChu)             QObject.connect(button_eq,SIGNAL("clicked()"),self.func_buttonEqual)             QObject.connect(button_clear,SIGNAL("clicked()"),self.func_buttonClear)    def closeEvent(self,event):#窗口关闭时的处理，只实现这个函数就可以，不用去调用        reply = QMessageBox.question(self,'Message',"Are you sure to quit?",QMessageBox.Yes,QMessageBox.No)        if reply == QMessageBox.Yes:            event.accept()        else:            event.ignore()    def func_button7(self):        if self.flag == '1':            self.str2 = self.str2 + '7'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '7'            lcd.setText(self.str1)    def func_button8(self):        if self.flag == '1':            self.str2 = self.str2 + '8'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '8'            lcd.setText(self.str1)    def func_button9(self):        if self.flag == '1':            self.str2 = self.str2 + '9'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '9'            lcd.setText(self.str1)    def func_button4(self):        if self.flag == '1':            self.str2 = self.str2 + '4'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '4'            lcd.setText(self.str1)    def func_button5(self):        if self.flag == '1':            self.str2 = self.str2 + '5'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '5'            lcd.setText(self.str1)    def func_button6(self):        if self.flag == '1':            self.str2 = self.str2 + '6'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '6'            lcd.setText(self.str1)    def func_button1(self):        if self.flag == '1':            self.str2 = self.str2 + '1'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '1'            lcd.setText(self.str1)    def func_button2(self):        if self.flag == '1':            self.str2 = self.str2 + '2'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '2'            lcd.setText(self.str1)    def func_button3(self):        if self.flag == '1':            self.str2 = self.str2 + '3'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '3'            lcd.setText(self.str1)    def func_button0(self):        if self.flag == '1':            self.str2 = self.str2 + '0'            lcd.setText(self.str2)        else:            self.str1 = self.str1 + '0'            lcd.setText(self.str1)    #运算符处理函数    def func_buttonAdd(self):        lcd.setText(self.str2)        self.flag = '1'        self.calFlag = '1'    def func_buttonDec(self):        lcd.setText(self.str2)        self.flag = '1'        self.calFlag = '2'    def func_buttonMul(self):        lcd.setText(self.str2)        self.flag = '1'        self.calFlag = '3'    def func_buttonChu(self):        lcd.setText(self.str2)        self.flag = '1'        self.calFlag = '4'    def func_buttonEqual(self):        #字符串先转换为数字，计算结果后再转换为字符串        if self.calFlag == '1':            num = str(int(self.str1) + int(self.str2))        elif self.calFlag == '2':            num = str(int(self.str1) - int(self.str2))        elif self.calFlag == '3':            num = str(int(self.str1) * int(self.str2))        elif self.calFlag == '4':             num = str(int(self.str1) / int(self.str2))        else:            self.calFlag = '0'        lcd.setText(num)    def func_buttonClear(self):        self.str1 = ''        self.str2 = ''        lcd.setText('')        self.flag = '0'if __name__ == "__main__":    app = QApplication(sys.argv)    myapp = UI_form()    myapp.show()    sys.exit(app.exec_())

 

5.类的封装【简版】

 

6、处理json中的数据

 

#json string:import jsons = json.loads('{"name":"test", "type":{"name":"seq", "parameter":["1", "2"]}}')print (s.keys())print (s["name"])print (s["type"]["name"])print (s["type"]["parameter"][1])