如何解决运行多个pyqt或pyqtgraph绘图组件自崩溃问题？
How to solve the self-crash problem of running multiple pyqt or pyqtgraph drawing components?
我设计了界面，自定义组件尝试输出多个绘图组件，一会程序就崩溃了。
该程序可能包括以下内容：ble. Py 读取临时保存 EMG 数组的蓝牙值。 main_plot.py 实例化 Show_EMG 绘图 class 并输出 Show_EMG 绘图 class 读取 ble.PY
的蓝牙值
程序自己崩溃了，没有报错，我尝试在不同的终端输出错误。
错误信息：
命令：
pyqtgraph组件代码(Show_EMG.py):
import ble
from pyqtgraph import PlotWidget
import pyqtgraph as pg
import numpy as np
from PyQt5 import QtCore
class Plot_Show(object):
'''
Form,y,x,data,length = 1800, width = 250, high = 120, text = "sEMG Voltage"
'''
def __init__(self,Form,y,x,data,text=""):
# length = 1800, width = 250, high = 120, text = "sEMG Voltage"
self.Form=Form
self.y=y
self.x=x
self.data=ble.EMG[data]
self.length=1800
if(text==""):
self.test="sEMG Voltage"
else:
self.text = text
self.graphicsView = PlotWidget(self.Form)
self.initUI()
def initUI(self):
self.graphicsView.setGeometry(QtCore.QRect(self.y, self.x, 250, 120))
self.graphicsView.hideButtons()
self.graphicsView.setObjectName(self.text)
self.graphicsView.setLabel(axis="left",text=self.text)
self.graphicsView.setLabel(axis='bottom',text='Time')
self.graphicsView.setMouseEnabled(x=False,y=False)
self.graphicsView.setAntialiasing(True)
self.graphicsView.setMenuEnabled(False)
self.graphicsView.hideButtons()
self.data1 = np.zeros(self.length)
self.curve1 = self.graphicsView.plot(self.data1)
self.ptr1 = 0
def update1():
global data1, ptr1
self.graphicsView.setRange(xRange=[self.ptr1,self.ptr1+self.length],yRange=[5,550],padding=0)
self.data1[:-1] = self.data1[1:] # shift data in the array one sample left
self.data1[-1] = self.data
self.ptr1 += 1
self.curve1.setData(self.data1)
self.curve1.setPos(self.ptr1, 0)
self.timer = pg.QtCore.QTimer()
self.timer.timeout.connect(update1)
self.timer.start(10)
main_plot.py代码：
import ble
import sys
import Show_EMG
from PyQt5 import QtCore, QtWidgets
import threading
class Ui_Form(object):
def __init__(self):
super().__init__()
def setupUi(self, Form,**kwargs):
Form.resize(820, 454)
Form.setObjectName("Form")
Show_EMG.Plot_Show(Form=Form, y=10, x=10, data=0, text="sEMG2 Voltage")
Show_EMG.Plot_Show(Form=Form, y=10, x=140, data=1, text="sEMG2 Voltage")
Show_EMG.Plot_Show(Form=Form, y=10, x=270, data=2, text="sEMG3 Voltage")
Show_EMG.Plot_Show(Form=Form, y=280, x=10, data=3, text="sEMG4 Voltage")
Show_EMG.Plot_Show(Form=Form, y=280, x=140, data=4, text="sEMG5 Voltage")
Show_EMG.Plot_Show(Form=Form, y=280, x=270, data=5, text="sEMG6 Voltage")
Show_EMG.Plot_Show(Form=Form, y=550, x=10, data=0, text="sEMG7 Voltage")
Show_EMG.Plot_Show(Form=Form, y=550, x=140, data=0, text="sEMG8 Voltage")
self.gridLayoutWidget = QtWidgets.QWidget(Form)
self.gridLayoutWidget.setGeometry(QtCore.QRect(550, 270, 261, 121))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0)
self.gridLayout.setObjectName("gridLayout")
self.pushButton = QtWidgets.QPushButton(Form)
self.pushButton.setGeometry(QtCore.QRect(370, 410, 75, 23))
self.pushButton.setObjectName("pushButton")
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
self.pushButton.setText(_translate("Form", "开始记录"))
Form.setWindowTitle(_translate("Form", "Form"))
def main():
app = QtWidgets.QApplication(sys.argv)
Form = QtWidgets.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
sys.exit(app.exec_())
if __name__ == "__main__":
thread_main=threading.Thread(target=main)
thread_main.start()
thread_ble=threading.Thread(target=ble.ble)
thread_ble.start()
Ble.EMG数组暂时默认为：[200. 0. 0. 0. 0. 0.]
更多 Ble 代码详细信息：
https://gist.github.com/allrobot/1547447f313942f278118cb2e569f59f
我尝试在 main_plot.py 中添加线程，但程序仍然崩溃...
也许 QTimer 应该是问题的原因？
如何修改代码解决自闪问题？我需要修复自定义组件classes，但我是PyQT新手，您有什么建议吗？
感谢@furas和@musicamante建议，问题解决
这个错误非常简单。
我设置的刷新率太快了。因为我在自定义组件class中设置了self.timer.start(10)，所以程序崩溃itself.It只需要设置self.timer.start(100)，程序就可以运行...
如您所知（所有）GUI 不应 运行 在单独的线程中。
但我在代码中遇到的主要问题是，如果 PyQt 中的某些元素未分配给全局变量或 class 变量，它们将无法工作。
当 Plot 未分配给变量时，它的 QTimer 对我不起作用。
所以我将所有 Plot 都放在列表中，现在所有 QTimer（没有特殊线程）都适合我。
self.plots = [
PlotShow(...),
PlotShow(...),
PlotShow(...),
# ...
]
完整的工作代码。
我使用 class ble 来模拟模块 ble.py 并将所有代码放在一个文件中（用于测试）。
我也做了一些小改动：PEP 8 -- Style Guide for Python Code
#import ble
from PyQt5 import QtCore, QtWidgets
import pyqtgraph as pg # pg.PlotWidget
import numpy as np
import threading
class ble:
''' Simulate module `ble.py` '''
EMG = [0,0,0,0,0,0,0,0,0,0,0,0,0]
def ble():
import math
import random
import time
counter = 0
while True:
for i in range(10):
if i in (0, 4, 8):
ble.EMG[i] = random.randint(0, 550)
elif i in (1, 5, 6):
ble.EMG[i] = random.randint(150, 250)
else:
ble.EMG[i] = 200 + math.sin(math.radians(counter//i)) * 200
counter += 1
time.sleep(0.1)
class PlotShow(): # PE8: `CamelNames` for classes
'''
form, y, x, data, length=1800, width=250, high=120, text="sEMG Voltage"
'''
def __init__(self, form, y, x, data_number, text=""): # PEP8: spaces after commans `,`
self.form = form # PE8: `lower_case_names` for variables
self.y = y
self.x = x
self.data_number = data_number
self.length = 1800
self.data = np.zeros(self.length)
self.ptr = 0
if not text:
self.test="sEMG Voltage"
else:
self.text = text
self.initUI()
#print('start:', self.text)
self.timer = pg.QtCore.QTimer()
self.timer.timeout.connect(self.update_plot)
self.timer.start(10)
def initUI(self):
self.graphicsView = pg.PlotWidget(self.form)
self.graphicsView.setGeometry(QtCore.QRect(self.y, self.x, 250, 120))
self.graphicsView.hideButtons()
self.graphicsView.setObjectName(self.text)
self.graphicsView.setLabel(axis="left",text=self.text)
self.graphicsView.setLabel(axis='bottom',text='Time')
self.graphicsView.setMouseEnabled(x=False,y=False)
self.graphicsView.setAntialiasing(True)
self.graphicsView.setMenuEnabled(False)
self.graphicsView.hideButtons()
self.curve = self.graphicsView.plot(self.data)
def update_plot(self):
#print('update:', self.text)
self.data[:-1] = self.data[1:] # shift data in the array one sample left
self.data[-1] = ble.EMG[self.data_number]
self.ptr += 1
self.curve.setData(self.data)
self.curve.setPos(self.ptr, 0)
self.graphicsView.setRange(xRange=[self.ptr, self.ptr+self.length], yRange=[5, 550], padding=0) # PEP8: spaces after commans `,`
class UIForm(): # PE8: `CamelNames` for classes
def setupUI(self, form, **kwargs):
form.resize(820, 454)
form.setObjectName("Form")
self.plots = [
PlotShow(form=form, y=10, x=10, data_number=0, text="sEMG1 Voltage"),
PlotShow(form=form, y=10, x=140, data_number=1, text="sEMG2 Voltage"),
PlotShow(form=form, y=10, x=270, data_number=2, text="sEMG3 Voltage"),
PlotShow(form=form, y=280, x=10, data_number=3, text="sEMG4 Voltage"),
PlotShow(form=form, y=280, x=140, data_number=4, text="sEMG5 Voltage"),
PlotShow(form=form, y=280, x=270, data_number=5, text="sEMG6 Voltage"),
PlotShow(form=form, y=550, x=10, data_number=6, text="sEMG7 Voltage"),
PlotShow(form=form, y=550, x=140, data_number=7, text="sEMG8 Voltage"),
PlotShow(form=form, y=550, x=270, data_number=8, text="sEMG9 Voltage"),
]
self.gridLayoutWidget = QtWidgets.QWidget(form)
self.gridLayoutWidget.setGeometry(QtCore.QRect(550, 270, 261, 121))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0)
self.gridLayout.setObjectName("gridLayout")
self.pushButton = QtWidgets.QPushButton(form)
self.pushButton.setGeometry(QtCore.QRect(370, 410, 75, 23))
self.pushButton.setObjectName("pushButton")
self.retranslateUi(form)
QtCore.QMetaObject.connectSlotsByName(form)
def retranslateUi(self, form):
_translate = QtCore.QCoreApplication.translate
self.pushButton.setText(_translate("Form", "开始记录"))
form.setWindowTitle(_translate("Form", "Form"))
def main():
app = QtWidgets.QApplication([])
form = QtWidgets.QWidget() # PE8: `lower_case_names` for variables
ui = UIForm()
ui.setupUI(form)
form.show()
app.exec()
if __name__ == "__main__":
# better start before GUI to create all needed variables and values
thread_ble = threading.Thread(target=ble.ble)
thread_ble.start()
#thread_main = threading.Thread(target=main)
#thread_main.start()
#input() # keep running program when GUI runs in thread
# GUI rather shouldn't run in separated thread
main()
坦率地说，如果所有地块在同一时间从同一来源获取数据，那么您可以使用一个 QTimer 来 运行 所有地块中的所有 update1 - 但这个计时器应该在 UIForm 而不是 PlotShow
编辑：
仅使用 UIForm 中的一个 QTimer 对列表 self.plots.
中的所有地块执行 update_plot() 的版本
#import ble
from PyQt5 import QtCore, QtWidgets
import pyqtgraph as pg # pg.PlotWidget
import numpy as np
import threading
class ble:
''' Simulate module `ble.py` '''
EMG = [0,0,0,0,0,0,0,0,0,0,0,0,0]
def ble():
import math
import random
import time
counter = 0
while True:
for i in range(10):
if i in (0, 4, 8):
ble.EMG[i] = random.randint(0, 550)
elif i in (1, 5, 6):
ble.EMG[i] = random.randint(150, 250)
else:
ble.EMG[i] = 200 + math.sin(math.radians(counter//i)) * 200
counter += 1
time.sleep(0.1)
class PlotShow(): # PE8: `CamelNames` for classes
'''
form, y, x, data, length=1800, width=250, high=120, text="sEMG Voltage"
'''
def __init__(self, form, y, x, data_number, text=""): # PEP8: spaces after commans `,`
self.form = form # PE8: `lower_case_names` for variables
self.y = y
self.x = x
self.data_number = data_number
self.length = 1800
self.data = np.zeros(self.length)
self.ptr = 0
if not text:
self.test="sEMG Voltage"
else:
self.text = text
self.initUI()
#print('start:', self.text)
#self.timer = pg.QtCore.QTimer()
#self.timer.timeout.connect(self.update_plot)
#self.timer.start(10)
def initUI(self):
self.graphicsView = pg.PlotWidget(self.form)
self.graphicsView.setGeometry(QtCore.QRect(self.y, self.x, 250, 120))
self.graphicsView.hideButtons()
self.graphicsView.setObjectName(self.text)
self.graphicsView.setLabel(axis="left",text=self.text)
self.graphicsView.setLabel(axis='bottom',text='Time')
self.graphicsView.setMouseEnabled(x=False,y=False)
self.graphicsView.setAntialiasing(True)
self.graphicsView.setMenuEnabled(False)
self.graphicsView.hideButtons()
self.curve = self.graphicsView.plot(self.data)
def update_plot(self):
#print('update:', self.text)
self.data[:-1] = self.data[1:] # shift data in the array one sample left
self.data[-1] = ble.EMG[self.data_number]
self.ptr += 1
self.curve.setData(self.data)
self.curve.setPos(self.ptr, 0)
self.graphicsView.setRange(xRange=[self.ptr, self.ptr+self.length], yRange=[5, 550], padding=0) # PEP8: spaces after commans `,`
class UIForm(): # PE8: `CamelNames` for classes
def setupUI(self, form, **kwargs):
form.resize(820, 454)
form.setObjectName("Form")
self.plots = [
PlotShow(form=form, y=10, x=10, data_number=0, text="sEMG1 Voltage"),
PlotShow(form=form, y=10, x=140, data_number=1, text="sEMG2 Voltage"),
PlotShow(form=form, y=10, x=270, data_number=2, text="sEMG3 Voltage"),
PlotShow(form=form, y=280, x=10, data_number=3, text="sEMG4 Voltage"),
PlotShow(form=form, y=280, x=140, data_number=4, text="sEMG5 Voltage"),
PlotShow(form=form, y=280, x=270, data_number=5, text="sEMG6 Voltage"),
PlotShow(form=form, y=550, x=10, data_number=6, text="sEMG7 Voltage"),
PlotShow(form=form, y=550, x=140, data_number=7, text="sEMG8 Voltage"),
PlotShow(form=form, y=550, x=270, data_number=8, text="sEMG9 Voltage"),
]
self.gridLayoutWidget = QtWidgets.QWidget(form)
self.gridLayoutWidget.setGeometry(QtCore.QRect(550, 270, 261, 121))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0)
self.gridLayout.setObjectName("gridLayout")
self.pushButton = QtWidgets.QPushButton(form)
self.pushButton.setGeometry(QtCore.QRect(370, 410, 75, 23))
self.pushButton.setObjectName("pushButton")
self.retranslateUi(form)
QtCore.QMetaObject.connectSlotsByName(form)
self.timer = pg.QtCore.QTimer()
self.timer.timeout.connect(self.update_all_plots)
self.timer.start(10)
def update_all_plots(self):
for plot in self.plots:
plot.update_plot()
def retranslateUi(self, form):
_translate = QtCore.QCoreApplication.translate
self.pushButton.setText(_translate("Form", "开始记录"))
form.setWindowTitle(_translate("Form", "Form"))
def main():
app = QtWidgets.QApplication([])
form = QtWidgets.QWidget() # PE8: `lower_case_names` for variables
ui = UIForm()
ui.setupUI(form)
form.show()
app.exec()
if __name__ == "__main__":
# better start before GUI to create all needed variables and values
thread_ble = threading.Thread(target=ble.ble)
thread_ble.start()
#thread_main = threading.Thread(target=main)
#thread_main.start()
#input() # keep running program when GUI runs in thread
# GUI rather shouldn't run in separated thread
main()
我设计了界面，自定义组件尝试输出多个绘图组件，一会程序就崩溃了。
该程序可能包括以下内容：ble. Py 读取临时保存 EMG 数组的蓝牙值。 main_plot.py 实例化 Show_EMG 绘图 class 并输出 Show_EMG 绘图 class 读取 ble.PY
程序自己崩溃了，没有报错，我尝试在不同的终端输出错误。
错误信息：
命令：
pyqtgraph组件代码(Show_EMG.py):
import ble
from pyqtgraph import PlotWidget
import pyqtgraph as pg
import numpy as np
from PyQt5 import QtCore
class Plot_Show(object):
'''
Form,y,x,data,length = 1800, width = 250, high = 120, text = "sEMG Voltage"
'''
def __init__(self,Form,y,x,data,text=""):
# length = 1800, width = 250, high = 120, text = "sEMG Voltage"
self.Form=Form
self.y=y
self.x=x
self.data=ble.EMG[data]
self.length=1800
if(text==""):
self.test="sEMG Voltage"
else:
self.text = text
self.graphicsView = PlotWidget(self.Form)
self.initUI()
def initUI(self):
self.graphicsView.setGeometry(QtCore.QRect(self.y, self.x, 250, 120))
self.graphicsView.hideButtons()
self.graphicsView.setObjectName(self.text)
self.graphicsView.setLabel(axis="left",text=self.text)
self.graphicsView.setLabel(axis='bottom',text='Time')
self.graphicsView.setMouseEnabled(x=False,y=False)
self.graphicsView.setAntialiasing(True)
self.graphicsView.setMenuEnabled(False)
self.graphicsView.hideButtons()
self.data1 = np.zeros(self.length)
self.curve1 = self.graphicsView.plot(self.data1)
self.ptr1 = 0
def update1():
global data1, ptr1
self.graphicsView.setRange(xRange=[self.ptr1,self.ptr1+self.length],yRange=[5,550],padding=0)
self.data1[:-1] = self.data1[1:] # shift data in the array one sample left
self.data1[-1] = self.data
self.ptr1 += 1
self.curve1.setData(self.data1)
self.curve1.setPos(self.ptr1, 0)
self.timer = pg.QtCore.QTimer()
self.timer.timeout.connect(update1)
self.timer.start(10)
main_plot.py代码：
import ble
import sys
import Show_EMG
from PyQt5 import QtCore, QtWidgets
import threading
class Ui_Form(object):
def __init__(self):
super().__init__()
def setupUi(self, Form,**kwargs):
Form.resize(820, 454)
Form.setObjectName("Form")
Show_EMG.Plot_Show(Form=Form, y=10, x=10, data=0, text="sEMG2 Voltage")
Show_EMG.Plot_Show(Form=Form, y=10, x=140, data=1, text="sEMG2 Voltage")
Show_EMG.Plot_Show(Form=Form, y=10, x=270, data=2, text="sEMG3 Voltage")
Show_EMG.Plot_Show(Form=Form, y=280, x=10, data=3, text="sEMG4 Voltage")
Show_EMG.Plot_Show(Form=Form, y=280, x=140, data=4, text="sEMG5 Voltage")
Show_EMG.Plot_Show(Form=Form, y=280, x=270, data=5, text="sEMG6 Voltage")
Show_EMG.Plot_Show(Form=Form, y=550, x=10, data=0, text="sEMG7 Voltage")
Show_EMG.Plot_Show(Form=Form, y=550, x=140, data=0, text="sEMG8 Voltage")
self.gridLayoutWidget = QtWidgets.QWidget(Form)
self.gridLayoutWidget.setGeometry(QtCore.QRect(550, 270, 261, 121))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0)
self.gridLayout.setObjectName("gridLayout")
self.pushButton = QtWidgets.QPushButton(Form)
self.pushButton.setGeometry(QtCore.QRect(370, 410, 75, 23))
self.pushButton.setObjectName("pushButton")
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
self.pushButton.setText(_translate("Form", "开始记录"))
Form.setWindowTitle(_translate("Form", "Form"))
def main():
app = QtWidgets.QApplication(sys.argv)
Form = QtWidgets.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
sys.exit(app.exec_())
if __name__ == "__main__":
thread_main=threading.Thread(target=main)
thread_main.start()
thread_ble=threading.Thread(target=ble.ble)
thread_ble.start()
Ble.EMG数组暂时默认为：[200. 0. 0. 0. 0. 0.]
更多 Ble 代码详细信息： https://gist.github.com/allrobot/1547447f313942f278118cb2e569f59f
我尝试在 main_plot.py 中添加线程，但程序仍然崩溃...
也许 QTimer 应该是问题的原因？
如何修改代码解决自闪问题？我需要修复自定义组件classes，但我是PyQT新手，您有什么建议吗？
感谢@furas和@musicamante建议，问题解决
这个错误非常简单。
我设置的刷新率太快了。因为我在自定义组件class中设置了self.timer.start(10)，所以程序崩溃itself.It只需要设置self.timer.start(100)，程序就可以运行...
如您所知（所有）GUI 不应 运行 在单独的线程中。
但我在代码中遇到的主要问题是，如果 PyQt 中的某些元素未分配给全局变量或 class 变量，它们将无法工作。
当 Plot 未分配给变量时，它的 QTimer 对我不起作用。
所以我将所有 Plot 都放在列表中，现在所有 QTimer（没有特殊线程）都适合我。
self.plots = [
PlotShow(...),
PlotShow(...),
PlotShow(...),
# ...
]
完整的工作代码。
我使用 class ble 来模拟模块 ble.py 并将所有代码放在一个文件中（用于测试）。
我也做了一些小改动：PEP 8 -- Style Guide for Python Code
#import ble
from PyQt5 import QtCore, QtWidgets
import pyqtgraph as pg # pg.PlotWidget
import numpy as np
import threading
class ble:
''' Simulate module `ble.py` '''
EMG = [0,0,0,0,0,0,0,0,0,0,0,0,0]
def ble():
import math
import random
import time
counter = 0
while True:
for i in range(10):
if i in (0, 4, 8):
ble.EMG[i] = random.randint(0, 550)
elif i in (1, 5, 6):
ble.EMG[i] = random.randint(150, 250)
else:
ble.EMG[i] = 200 + math.sin(math.radians(counter//i)) * 200
counter += 1
time.sleep(0.1)
class PlotShow(): # PE8: `CamelNames` for classes
'''
form, y, x, data, length=1800, width=250, high=120, text="sEMG Voltage"
'''
def __init__(self, form, y, x, data_number, text=""): # PEP8: spaces after commans `,`
self.form = form # PE8: `lower_case_names` for variables
self.y = y
self.x = x
self.data_number = data_number
self.length = 1800
self.data = np.zeros(self.length)
self.ptr = 0
if not text:
self.test="sEMG Voltage"
else:
self.text = text
self.initUI()
#print('start:', self.text)
self.timer = pg.QtCore.QTimer()
self.timer.timeout.connect(self.update_plot)
self.timer.start(10)
def initUI(self):
self.graphicsView = pg.PlotWidget(self.form)
self.graphicsView.setGeometry(QtCore.QRect(self.y, self.x, 250, 120))
self.graphicsView.hideButtons()
self.graphicsView.setObjectName(self.text)
self.graphicsView.setLabel(axis="left",text=self.text)
self.graphicsView.setLabel(axis='bottom',text='Time')
self.graphicsView.setMouseEnabled(x=False,y=False)
self.graphicsView.setAntialiasing(True)
self.graphicsView.setMenuEnabled(False)
self.graphicsView.hideButtons()
self.curve = self.graphicsView.plot(self.data)
def update_plot(self):
#print('update:', self.text)
self.data[:-1] = self.data[1:] # shift data in the array one sample left
self.data[-1] = ble.EMG[self.data_number]
self.ptr += 1
self.curve.setData(self.data)
self.curve.setPos(self.ptr, 0)
self.graphicsView.setRange(xRange=[self.ptr, self.ptr+self.length], yRange=[5, 550], padding=0) # PEP8: spaces after commans `,`
class UIForm(): # PE8: `CamelNames` for classes
def setupUI(self, form, **kwargs):
form.resize(820, 454)
form.setObjectName("Form")
self.plots = [
PlotShow(form=form, y=10, x=10, data_number=0, text="sEMG1 Voltage"),
PlotShow(form=form, y=10, x=140, data_number=1, text="sEMG2 Voltage"),
PlotShow(form=form, y=10, x=270, data_number=2, text="sEMG3 Voltage"),
PlotShow(form=form, y=280, x=10, data_number=3, text="sEMG4 Voltage"),
PlotShow(form=form, y=280, x=140, data_number=4, text="sEMG5 Voltage"),
PlotShow(form=form, y=280, x=270, data_number=5, text="sEMG6 Voltage"),
PlotShow(form=form, y=550, x=10, data_number=6, text="sEMG7 Voltage"),
PlotShow(form=form, y=550, x=140, data_number=7, text="sEMG8 Voltage"),
PlotShow(form=form, y=550, x=270, data_number=8, text="sEMG9 Voltage"),
]
self.gridLayoutWidget = QtWidgets.QWidget(form)
self.gridLayoutWidget.setGeometry(QtCore.QRect(550, 270, 261, 121))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0)
self.gridLayout.setObjectName("gridLayout")
self.pushButton = QtWidgets.QPushButton(form)
self.pushButton.setGeometry(QtCore.QRect(370, 410, 75, 23))
self.pushButton.setObjectName("pushButton")
self.retranslateUi(form)
QtCore.QMetaObject.connectSlotsByName(form)
def retranslateUi(self, form):
_translate = QtCore.QCoreApplication.translate
self.pushButton.setText(_translate("Form", "开始记录"))
form.setWindowTitle(_translate("Form", "Form"))
def main():
app = QtWidgets.QApplication([])
form = QtWidgets.QWidget() # PE8: `lower_case_names` for variables
ui = UIForm()
ui.setupUI(form)
form.show()
app.exec()
if __name__ == "__main__":
# better start before GUI to create all needed variables and values
thread_ble = threading.Thread(target=ble.ble)
thread_ble.start()
#thread_main = threading.Thread(target=main)
#thread_main.start()
#input() # keep running program when GUI runs in thread
# GUI rather shouldn't run in separated thread
main()
坦率地说，如果所有地块在同一时间从同一来源获取数据，那么您可以使用一个 QTimer 来 运行 所有地块中的所有 update1 - 但这个计时器应该在 UIForm 而不是 PlotShow
编辑：
仅使用 UIForm 中的一个 QTimer 对列表 self.plots.
update_plot() 的版本
#import ble
from PyQt5 import QtCore, QtWidgets
import pyqtgraph as pg # pg.PlotWidget
import numpy as np
import threading
class ble:
''' Simulate module `ble.py` '''
EMG = [0,0,0,0,0,0,0,0,0,0,0,0,0]
def ble():
import math
import random
import time
counter = 0
while True:
for i in range(10):
if i in (0, 4, 8):
ble.EMG[i] = random.randint(0, 550)
elif i in (1, 5, 6):
ble.EMG[i] = random.randint(150, 250)
else:
ble.EMG[i] = 200 + math.sin(math.radians(counter//i)) * 200
counter += 1
time.sleep(0.1)
class PlotShow(): # PE8: `CamelNames` for classes
'''
form, y, x, data, length=1800, width=250, high=120, text="sEMG Voltage"
'''
def __init__(self, form, y, x, data_number, text=""): # PEP8: spaces after commans `,`
self.form = form # PE8: `lower_case_names` for variables
self.y = y
self.x = x
self.data_number = data_number
self.length = 1800
self.data = np.zeros(self.length)
self.ptr = 0
if not text:
self.test="sEMG Voltage"
else:
self.text = text
self.initUI()
#print('start:', self.text)
#self.timer = pg.QtCore.QTimer()
#self.timer.timeout.connect(self.update_plot)
#self.timer.start(10)
def initUI(self):
self.graphicsView = pg.PlotWidget(self.form)
self.graphicsView.setGeometry(QtCore.QRect(self.y, self.x, 250, 120))
self.graphicsView.hideButtons()
self.graphicsView.setObjectName(self.text)
self.graphicsView.setLabel(axis="left",text=self.text)
self.graphicsView.setLabel(axis='bottom',text='Time')
self.graphicsView.setMouseEnabled(x=False,y=False)
self.graphicsView.setAntialiasing(True)
self.graphicsView.setMenuEnabled(False)
self.graphicsView.hideButtons()
self.curve = self.graphicsView.plot(self.data)
def update_plot(self):
#print('update:', self.text)
self.data[:-1] = self.data[1:] # shift data in the array one sample left
self.data[-1] = ble.EMG[self.data_number]
self.ptr += 1
self.curve.setData(self.data)
self.curve.setPos(self.ptr, 0)
self.graphicsView.setRange(xRange=[self.ptr, self.ptr+self.length], yRange=[5, 550], padding=0) # PEP8: spaces after commans `,`
class UIForm(): # PE8: `CamelNames` for classes
def setupUI(self, form, **kwargs):
form.resize(820, 454)
form.setObjectName("Form")
self.plots = [
PlotShow(form=form, y=10, x=10, data_number=0, text="sEMG1 Voltage"),
PlotShow(form=form, y=10, x=140, data_number=1, text="sEMG2 Voltage"),
PlotShow(form=form, y=10, x=270, data_number=2, text="sEMG3 Voltage"),
PlotShow(form=form, y=280, x=10, data_number=3, text="sEMG4 Voltage"),
PlotShow(form=form, y=280, x=140, data_number=4, text="sEMG5 Voltage"),
PlotShow(form=form, y=280, x=270, data_number=5, text="sEMG6 Voltage"),
PlotShow(form=form, y=550, x=10, data_number=6, text="sEMG7 Voltage"),
PlotShow(form=form, y=550, x=140, data_number=7, text="sEMG8 Voltage"),
PlotShow(form=form, y=550, x=270, data_number=8, text="sEMG9 Voltage"),
]
self.gridLayoutWidget = QtWidgets.QWidget(form)
self.gridLayoutWidget.setGeometry(QtCore.QRect(550, 270, 261, 121))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0)
self.gridLayout.setObjectName("gridLayout")
self.pushButton = QtWidgets.QPushButton(form)
self.pushButton.setGeometry(QtCore.QRect(370, 410, 75, 23))
self.pushButton.setObjectName("pushButton")
self.retranslateUi(form)
QtCore.QMetaObject.connectSlotsByName(form)
self.timer = pg.QtCore.QTimer()
self.timer.timeout.connect(self.update_all_plots)
self.timer.start(10)
def update_all_plots(self):
for plot in self.plots:
plot.update_plot()
def retranslateUi(self, form):
_translate = QtCore.QCoreApplication.translate
self.pushButton.setText(_translate("Form", "开始记录"))
form.setWindowTitle(_translate("Form", "Form"))
def main():
app = QtWidgets.QApplication([])
form = QtWidgets.QWidget() # PE8: `lower_case_names` for variables
ui = UIForm()
ui.setupUI(form)
form.show()
app.exec()
if __name__ == "__main__":
# better start before GUI to create all needed variables and values
thread_ble = threading.Thread(target=ble.ble)
thread_ble.start()
#thread_main = threading.Thread(target=main)
#thread_main.start()
#input() # keep running program when GUI runs in thread
# GUI rather shouldn't run in separated thread
main()