Missing characters in PyQt5

[LittleGrim13]

Hey Larz60+

I will try put some code in, it is about 2000 lines of code spread over 4 worksheets. So I am just going to drop what looks suspicious.

MainCode:

from PyQt5.QtGui import QColor
from PyQt5.QtWidgets import QApplication, QFileDialog, QDialog, QMessageBox
from interfaceUI import Ui_MainWindow

class interface(Ui_MainWindow):
    def __init__(self, Application):
        Ui_MainWindow.__init__(self)
        self.setupUi(Application)

#I believe this may be where all the issues arise from		
app = 0
app = QApplication(sys.argv)
Application = QDialog() 
Program = interface(Application)
Application.show()
app.exec_()

GUI generated from pyqt5

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1041, 680)
		self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.start_btn = QtWidgets.QPushButton(self.centralwidget
		
		self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
    
	def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate

Something that I still want to be able to accomplish is the ability to call text boxes and other objects from outside of their "self" name. I have been doing this with something along these line:
Program.Textbox.setText()
Is there a way to maintain this feature?