I have a program that requires several scripts to work together.
I managed to recreate the situation with a simplified example.
I have a main window (here called the StartTestUIv01) that is launched from another script (here called LaunchTestv01) so that variables and options can be added in my actual script. This main window have buttons that allows the user to open another window (here the BasicGraphUIv01) that itself uses data obtained by another script (here the LaunchBasicGraphv01).
So the script chain becomes like this: LaunchTestv01 -> StartTestUIv01 -> LaunchBasicGraphv01 -> BasicGraphUIv01
Here is the code for each: LaunchTestv01
## This will launch StartTestUIv01 with the button
from PyQt5 import QtWidgets
from PyQt5.QtCore import QProcess
from StartTestUIv01 import Ui_MainWindow
class Window(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
super().__init__(parent=parent)
self.setupUi(self)
self.startGraph = QtWidgets.QAction('Launch Graph', self)
self.w = None #Set the default value
self.pushButton.clicked.connect(self.LaunchGraph)
def LaunchGraph(self):
if self.w is None:
print("Working")
# self.message("Executing Graph script")
self.w = QProcess()
self.w.finished.connect(self.closeGraph)
self.w.start("python",['LaunchBasicGraphv01.py'])
def closeGraph(self):
print("Closing")
# self.message("Graph script ended")
self.w = None
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec())
StartTestUIv01
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(313, 196)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(30, 20, 261, 121))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 313, 22))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "START"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
LaunchBasicGraphv01
## This calculates values to insert in the Graph and displays that Window
from PyQt5 import QtWidgets
import BasicGraphUIv01 as ui
from pyqtgraph.Qt import QtCore
import numpy as np
x = np.arange(0,9)
y = np.random.randint(25, size=(9))
MainWindow = ui.QtWidgets.QMainWindow()
win = ui.Ui_MainWindow()
win.setupUi(MainWindow)
MainWindow.show()
# p0 = win.centralwidget.plot(x,y, pen='b')
p0 = win.graphWidget.plot(x,y, pen='y')
class Window(ui.QtWidgets.QMainWindow, ui.Ui_MainWindow):
def __init__(self, parent=None):
super().__init__(parent=parent)
self.setupUi(self)
def update():
y = np.random.randint(25, size=(9))
p0.setData(x,y)
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(0)
BasicGraphUIv01
from PyQt5 import QtCore, QtGui, QtWidgets
from pyqtgraph import PlotWidget
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(473, 283)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.graphWidget = PlotWidget(self.centralwidget)
self.graphWidget.setGeometry(QtCore.QRect(10, 10, 451, 211))
self.graphWidget.setObjectName("graphWidget")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 473, 22))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
Now the obvious problem is that the chain doesn't start ! It seems that if I'm launching a script that is itself launching another window, it just doesn't happen!
What is the proper way of doing this ?
EDIT: So I got banned because this solved question wasn't good enough or something. To clarify; I was searching for the proper way of launching a PyQt script from another in the case where a python script is needed in-between to collect data.
Hope this helps.
