I am trying to plot graphs using matplotlib when clicked on a button called "generate graph" in a QT window. At first, I found a problem : I cannot close plots or control it when the QT window is opened. But I found this solution : Cannot move Matplotlib plot window and exit it using red X button and I test it on an empty plot and it works. However, when I put my code I get this error :
QWidget: Must construct a QApplication before a QPaintDevice
In my qt window I put :
Process = subprocess.Popen(['python', 'mygraph.py'], shell=True).communicate()
in my script mygraph.py :
def main():
print("Beginning plot for section 2.1 ...")
#Get the selected iteration and sector
iter = InterfaceVariationTRANUS("config").DropDownListDisplayIter2_1.currentIndex()
sector = InterfaceVariationTRANUS("config").DropDownListDisplaySector2_1.currentIndex()
#Access the corresponding IMPLOC file and extract the data for the selected sector
nameDirectory = InterfaceVariationTRANUS("config").nameDirectory2_1 + str(iter)
pathToDirectory = os.path.join(InterfaceVariationTRANUS("config").pathOutputDirectoryInstance, nameDirectory)
filepath = os.path.join(pathToDirectory, "IMPLOC_J.MTX")
matrix = pd.read_csv(filepath)
matrix.columns = ["Scen", "Sector", "Zone", "TotProd", "TotDem", "ProdCost", "Price", "MinRes", "MaxRes", "Adjust"]
#Removal of the noise (production equal to zero => adjust equal to zero)
#matrix.Adjust[matrix.TotProd == 0] = 0
row_index = matrix.TotProd == 0
matrix.loc[row_index,'Adjust'] = 0
#matrix.Adjust[matrix.Price == 0] = 0
row_index = matrix.Price == 0
matrix.loc[row_index,'Adjust'] =0
#matrix.Price[matrix.Price == 0] = None
row_index = matrix.Price == 0
matrix.loc[row_index,'Price'] = None
matrix2 = matrix[["Sector","Zone", "Price", "Adjust"]]
#Isolation of the data for the sector selected
nameSector = str(InterfaceVariationTRANUS("config").stockParam.list_sectors[sector])+" "+(InterfaceVariationTRANUS().stockParam.list_names_sectors[sector])
matrix3 = matrix2[matrix2["Sector"].str.contains(nameSector) == True]
matrix4 = matrix3[matrix3["Zone"].str.contains("ext_") == False]
#This boolean is used to allow for multiple graphes to be shown on the same panel.
firstPlot = False
#Plot graph and display it
if(InterfaceVariationTRANUS("config").DropDownListDisplaySector2_1.currentIndex() != InterfaceVariationTRANUS("config").currentSectorPlot2_1):
InterfaceVariationTRANUS("config").numFiguresPlot2_1 = InterfaceVariationTRANUS("config").numFiguresPlot2_1 + 1
InterfaceVariationTRANUS("config").currentSectorPlot2_1 = InterfaceVariationTRANUS("config").DropDownListDisplaySector2_1.currentIndex()
firstPlot = True
fig = plt.figure(self.numFiguresPlot2_1)
fig.canvas.set_window_title(InterfaceVariationTRANUS("config").DropDownListDisplaySector2_1.currentText())
x = np.arange(0, InterfaceVariationTRANUS("config").stockParam.nTotZones, 1)
y = pd.to_numeric(matrix4["Price"])
print("Moyenne = ")
print(y.mean(0))
z = pd.to_numeric(matrix4["Adjust"]*y)/100 + y
# plot data
if(firstPlot):
price = plt.plot(x, y, label = ("Price"))
shadowPrice = plt.plot(x, z, label = ("Price + adjust for iteration "+InterfaceVariationTRANUS("config").DropDownListDisplayIter2_1.currentText()))
plt.legend()
plt.show(block=False) #method 3
plt.draw()
if name == 'main':
main()
Where InterfaceVariationTRANUS is the class of my QT window.