Python——作业12（选做）选中矩阵的每行或每列画出对应的折线图（python programming）

import os
import platform
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

import numpy as np
import matplotlib
matplotlib.use("Qt5Agg")
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure #注意不是pyplot下的那个figure

class Table(QWidget):

    def __init__(self):
        super().__init__()
        hhbox = QHBoxLayout()           #横向布局

        self.tableWidget = QTableWidget()    #创建一个表格
        self.tableWidget.setRowCount(5)
        self.tableWidget.setColumnCount(4)   #5行4列
        self.tableWidget.setHorizontalHeaderLabels(['第一行列','第二列','第三列','第四列'])
        self.tableWidget.setVerticalHeaderLabels(['第一行','第二行','第三行','第四行','第五行'])
                                        #表头

        # 往表格里添加东西
        #nu

        self.tableWidget.setItem(0,0,QTableWidgetItem(""))
        self.tableWidget.setItem(0,1,QTableWidgetItem(""))
        self.tableWidget.setItem(0,2,QTableWidgetItem(""))
        self.tableWidget.setItem(0,3,QTableWidgetItem(""))

        self.tableWidget.setItem(1,0,QTableWidgetItem(""))
        self.tableWidget.setItem(1,1,QTableWidgetItem(""))
        self.tableWidget.setItem(1,2,QTableWidgetItem(""))
        self.tableWidget.setItem(1,3,QTableWidgetItem(""))

        self.tableWidget.setItem(2,0,QTableWidgetItem(""))
        self.tableWidget.setItem(2,1,QTableWidgetItem(""))
        self.tableWidget.setItem(2,2,QTableWidgetItem(""))
        self.tableWidget.setItem(2,3,QTableWidgetItem(""))

        self.tableWidget.setItem(3,0,QTableWidgetItem(""))
        self.tableWidget.setItem(3,1,QTableWidgetItem(""))
        self.tableWidget.setItem(3,2,QTableWidgetItem(""))
        self.tableWidget.setItem(3,3,QTableWidgetItem(""))

        self.tableWidget.setItem(4,0,QTableWidgetItem(""))
        self.tableWidget.setItem(4,1,QTableWidgetItem(""))
        self.tableWidget.setItem(4,2,QTableWidgetItem(""))
        self.tableWidget.setItem(4,3,QTableWidgetItem(""))

        hhbox.addWidget(self.tableWidget)    #把表格加入布局

        self.setLayout(hhbox)           #创建布局

        self.setWindowTitle("表格")
        self.resize(600,250)
        self.show()

class Draw(QDialog):
    def __init__(self,parent=None):
        super().__init__(parent)
        self.table = Table()
        self.ok = QPushButton()
        self.ok.setText('画图')

            #绘图
        self.fig = Figure(figsize=(3, 3), dpi=100)
        self.figureCanvas = FigureCanvas(self.fig)
        self.graphicscene = QGraphicsScene()
        self.graphicscene.addWidget(self.figureCanvas)
        self.graphicview = QGraphicsView()
        self.graphicview.setScene(self.graphicscene)
        #self.setCentralWidget(self.graphicview)

        layout = QGridLayout()
        layout.addWidget(self.table, 0, 0)
        layout.addWidget(self.ok, 1, 0)
        layout.addWidget(self.graphicview, 0, 1)
        self.setLayout(layout)

        self.ok.clicked.connect(self.draw_pic)

    def draw_pic(self):

        #获取选中的项目
        item = self.table.tableWidget.selectedItems()
        ls=[]
        '''
        for i in item:
            ls.extend(self.table.tableWidget.indexFromItem(i).data())
            print(self.table.tableWidget.indexFromItem(i).data())
        '''

        for i in item:
            a=self.table.tableWidget.indexFromItem(i).row()
            #print(a)
            #print(dir(self.table.tableWidget.indexFromItem(i)))
            b=self.table.tableWidget.indexFromItem(i).column()
            #print(b)
            #print(self.table.tableWidget.indexFromItem(i).data())
            ls.append(int(self.table.tableWidget.item(a,b).text()))

        print(ls)  

        #显示
        self.fig.clf()
        self.ax = self.fig.add_subplot(1,1,1)
        self.ax.plot(ls)
        self.figureCanvas.draw()
        pass

if __name__ == "__main__":
    '''
    app = QApplication(sys.argv)
    dlg = Example()
    sys.exit(app.exec_())
    '''
    app = QApplication(sys.argv)
    form = Draw()
    form.setMinimumSize(1000,400)
    form.show()
    app.exec_()