关于python:pyqt5matplotlib绘制动态双y轴曲线

import sys
import time
from PyQt5 import QtWidgets, QtCore
from PyQt5.QtCore import QTimer
from PyQt5.QtWidgets import QMainWindow, QApplication, QGridLayout
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
from matplotlib.lines import Line2D
import matplotlib
import numpy as np
matplotlib.rcParams['font.sans-serif'] = ['SimHei'] # 解决坐标轴中文显示问题
matplotlib.rcParams['axes.unicode_minus'] = False # 解决负号不显示的问题
class Figure_Canvas(FigureCanvas):

"""创立画板类"""def __init__(self, width=3.2, height=2.7):    self.fig = Figure(figsize=(width, height), dpi=70)    super(Figure_Canvas, self).__init__(self.fig)    self.ax = self.fig.add_subplot(111)  # 111示意1行1列，第一张曲线图def add_line(self, x_data, y_data, y2_data=None):    self.line = Line2D(x_data, y_data)  # 绘制2D折线图    # ------------------调整折线图根本款式---------------------#    # self.line.set_ls('--')  # 设置连线    # self.line.set_marker('*') # 设置每个点    # self.line.set_color('red')  # 设置线条色彩    self.ax.grid(True)  # 增加网格    self.ax.set_title('[WebMoney下载](https://www.gendan5.com/wallet/WebMoney.html)动静曲线')  # 设置题目    # 设置xy轴最大最小值,找到x_data, y_data最大最小值    self.ax.set_xlim(np.min(x_data), np.max(x_data))    self.ax.set_ylim(np.min(y_data), np.max(y_data) + 2)  # y轴略微多一点，会难看一点    self.ax.set_xlabel('x坐标')  # 设置坐标名称    self.ax.set_ylabel('y坐标')    # 在曲线下方填充色彩    # self.ax.fill_between(x_data, y_data, color='g', alpha=0.1)    # self.ax.legend([self.line], ['sinx'])  # 增加图例    # ------------------------------------------------------#    self.ax.add_line(self.line)    # 绘制第二条曲线    self.line2 = Line2D(x_data, y2_data)    self.ax.add_line(self.line2)    self.line2.set_color('red')  # 设置线条色彩    self.ax.legend([self.line, self.line2], ['sinx', 'cosx'])  # 增加图例    self.ax2 = self.ax.twinx()    self.ax2.set_ylabel('y2坐标')

class linewidget(QMainWindow):

def __init__(self):    super(linewidget, self).__init__()    self.setWindowTitle('绘制动静曲线')    self.resize(1000, 800)    # 创立一个groupbox, 用来画动静曲线    self.groupBox = QtWidgets.QGroupBox(self)    self.groupBox.setGeometry(QtCore.QRect(100, 200, 800, 300))    self.load_line()  # 加载动静曲线    # 创立定时器，使曲线图动静更新    self.timer = QTimer()    self.timer.start(10)    self.ts = time.time()    self.timer.timeout.connect(self.Updatedata)def load_line(self):    self.LineFigure = Figure_Canvas()    self.LineFigureLayout = QGridLayout(self.groupBox)    self.LineFigureLayout.addWidget(self.LineFigure)    # 筹备数据，绘制曲线    x_data = np.arange(-4, 4, 0.02)    y_data = np.sin(x_data)    y2_data = np.cos(x_data)    self.LineFigure.add_line(x_data, y_data, y2_data)def Updatedata(self):    dt = time.time() - self.ts    x_data = np.arange(-4, 4, 0.02)    z_data = np.sin(x_data + dt)  # 筹备动态数据    h_data = np.cos(x_data + dt)    self.LineFigure.line.set_ydata(z_data)  # 更新数据    self.LineFigure.line2.set_ydata(h_data)    self.LineFigure.draw()  # 从新画图

if name == '__main__':

app = QApplication(sys.argv)mainMindow = linewidget()mainMindow.show()sys.exit(app.exec_())