usps-pyqt

#webscraper stuff
from bs4 import BeautifulSoup
import requests as req
import sys

#qt stuff
from PyQt5 import QtWidgets
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QApplication, QMainWindow

class windowApp(QMainWindow):
    #initialize the window
    def __init__(self):
        super(windowApp, self).__init__()
        self.setGeometry(200,200,800,600)
        self.setWindowTitle("Track Package")
        self.initUI()

    def initUI(self):
        ###Ultimately Just Gui Setup###
        #text input for the tracking number
        self.tnumber_field = QtWidgets.QLineEdit(self)
        self.tnumber_field.move(350, 150)
        self.tnumber_field.resize(170,35)

        #Button for the Tracking Number
        self.tnumB = QtWidgets.QPushButton(self)
        self.tnumB.setText("Track")
        self.tnumB.move(370, 400)
        self.tnumB.clicked.connect(self.tnumB_clicked)

        #Label to Display Text
        self.info = QtWidgets.QLabel(self)
        #self.info.setText("Temp")
        self.info.move(350, 200)

    
    def tnumB_clicked(self):
        info = self.fetch_info(self.tnumber_field.text())
        self.info.setText(info)
        self.update()
    
    def update(self):
        self.info.adjustSize()

    def fetch_info(self, tnum):
        # flag for validation
        ok = True

        trackNum = tnum

        # usps tracking action /go/TrackConfirmAction
        scrape_url = "https://tools.usps.com/go/TrackConfirmAction_input"

        # test num 9400109699937893440699

        # query to send with get request
        query = {
            'tRef': 'fullpage',
            'tLc': '2',
            'text28777': '',
            'tLabels': str(trackNum)
        }

        # go to usps website and grab data from query
        with req.Session() as session:
            try:
                # max number of redirects to allow
                session.max_redirects = 5
                # cause some websites are picky about your device
                session.headers.update({
                    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36',
                    'Referer': 'https://tools.usps.com/go/TrackConfirmAction_input'})
                response = session.get(scrape_url, params=query)
            except Exception as ex:
                print(ex)

        # extract data
        soup = BeautifulSoup(response.text, features='lxml')

        # the info we want
        info = soup.find('div', {"class": "status_feed"})

        extracted = info.text
        good = extracted.split("Get")

        good = good[0].strip('\n')
        clean = good.split('\n')
        clean[1] = clean[1].strip()
        good = '\n'.join(clean)
        return good


def window():
    #basic setup for qt apps
    app=QApplication(sys.argv)
    window = windowApp()

    #close window when exited
    window.show()
    sys.exit(app.exec_())

window()