def perform1(self):
try:
if (self.combo2.currentIndex() == 0
or self.combo3.currentIndex() == 0):
QMessageBox.question(self, 'Warning!!',
"Please Choose Valid Choice!",
QMessageBox.NoButton)
else:
country = self.combo1.currentText()
year1 = self.combo2.currentText()
year2 = self.combo3.currentText()
Graphs.Graph5(self, country, year1, year2)
except BaseException as ex:
print(ex)
