PyQt5的PyQtGraph实践系列3之实时数据更新绘制图形

# coding:utf-8
# @文件: 1.py
# @创建者：州的先生
# #日期：2019/5/12
# 博客地址：https://zmister.com
 
import psutil
cpu = "CPU:%0.2f" % psutil.cpu_percent(interval=1) + "%"
print(cpu)
 

# coding:utf-8
# @文件: 1.py
# @创建者：州的先生
# #日期：2019/5/12
# 博客地址：zmister.com
 
import psutil
import time
 
 
def get_cpu_info():
  cpu = "CPU:%0.2f" % psutil.cpu_percent(interval=1) + "%"
  return cpu
 
 
def main():
  while True:
    info = get_cpu_info()
    print(info)
    time.sleep(1)
 
 
if __name__ == "__main__":
  main()

# coding:utf-8
# @文件: 1.py
# @创建者：州的先生
# #日期：2019/5/12
# 博客地址：zmister.com
 
from PyQt5 import QtWidgets,QtCore,QtGui
import tushare as ts
import pyqtgraph as pg
import sys
import datetime
import traceback
import numpy as np
 
class MainUi(QtWidgets.QMainWindow):
  def __init__(self):
    super().__init__()
    self.setWindowTitle("CPU使用率监控 - 州的先生https://zmister.com")
    self.main_widget = QtWidgets.QWidget() # 创建一个主部件
    self.main_layout = QtWidgets.QGridLayout() # 创建一个网格布局
    self.main_widget.setLayout(self.main_layout) # 设置主部件的布局为网格
    self.setCentralWidget(self.main_widget) # 设置窗口默认部件
 
    self.plot_widget = QtWidgets.QWidget() # 实例化一个widget部件作为K线图部件
    self.plot_layout = QtWidgets.QGridLayout() # 实例化一个网格布局层
    self.plot_widget.setLayout(self.plot_layout) # 设置线图部件的布局层
    self.plot_plt = pg.PlotWidget() # 实例化一个绘图部件
    self.plot_plt.showGrid(x=True,y=True) # 显示图形网格
    self.plot_layout.addWidget(self.plot_plt) # 添加绘图部件到线图部件的网格布局层
    # 将上述部件添加到布局层中
    self.main_layout.addWidget(self.plot_widget, 1, 0, 3, 3)
 
    self.setCentralWidget(self.main_widget)
 
def main():
  app = QtWidgets.QApplication(sys.argv)
  gui = MainUi()
  gui.show()
  sys.exit(app.exec_())
 
 
if __name__ == '__main__':
  main()
 

from PyQt5 import QtWidgets,QtCore,QtGui
import pyqtgraph as pg
import sys
import traceback
import psutil
 
class MainUi(QtWidgets.QMainWindow):
  def __init__(self):
    super().__init__()
    self.setWindowTitle("CPU使用率监控 - 州的先生https://zmister.com")
    self.main_widget = QtWidgets.QWidget() # 创建一个主部件
    self.main_layout = QtWidgets.QGridLayout() # 创建一个网格布局
    self.main_widget.setLayout(self.main_layout) # 设置主部件的布局为网格
    self.setCentralWidget(self.main_widget) # 设置窗口默认部件
 
    self.plot_widget = QtWidgets.QWidget() # 实例化一个widget部件作为K线图部件
    self.plot_layout = QtWidgets.QGridLayout() # 实例化一个网格布局层
    self.plot_widget.setLayout(self.plot_layout) # 设置K线图部件的布局层
    self.plot_plt = pg.PlotWidget() # 实例化一个绘图部件
    self.plot_plt.showGrid(x=True,y=True) # 显示图形网格
    self.plot_layout.addWidget(self.plot_plt) # 添加绘图部件到K线图部件的网格布局层
    # 将上述部件添加到布局层中
    self.main_layout.addWidget(self.plot_widget, 1, 0, 3, 3)
 
    self.setCentralWidget(self.main_widget)
    self.plot_plt.setYRange(max=100,min=0)
    self.data_list = []
    self.timer_start()
 
  # 启动定时器 时间间隔秒
  def timer_start(self):
    self.timer = QtCore.QTimer(self)
    self.timer.timeout.connect(self.get_cpu_info)
    self.timer.start(1000)
 
  # 获取CPU使用率
  def get_cpu_info(self):
    try:
      cpu = "%0.2f" % psutil.cpu_percent(interval=1)
      self.data_list.append(float(cpu))
      print(float(cpu))
      self.plot_plt.plot().setData(self.data_list,pen='g')
    except Exception as e:
      print(traceback.print_exc())
 
def main():
  app = QtWidgets.QApplication(sys.argv)
  gui = MainUi()
  gui.show()
  sys.exit(app.exec_())
 
 
if __name__ == '__main__':
  main()