Scraping stocks - output in tkinter - python-3.x

Question

So here is my problem. I am trying to output my scraping results in a GUI using tkinter in python. The code i use works in the shell, but when i use it with tkinter it doesnt Here is my code.
import sys
from tkinter import *
from urllib.request import urlopen
import re
def stockSearch():
searchTerm = userInput.get()
url = "http://finance.yahoo.com/q?s="+searchTerm+"&q1=1"
htmlfile = urlopen(url)
htmltext = str(htmlfile.read())
regex = '<span id="yfs_l84_'+searchTerm+'">(.+?)</span>'
pattern = re.compile(regex)
price = re.findall(pattern, htmltext)
outputStock = str(["The price of ", searchTerm, "is ", price])
sLabel2 = Label(sGui, text=outputStock).pack()
sGui = Tk()
userInput = StringVar()
sGui.geometry("450x450+200+200")
sGui.title("Stocks")
sLabel = Label(sGui, text="Stocks List", fg="black")
sLabel.pack()
sButton = Button(sGui, text="LookUp", command = stockSearch)
sButton.place(x=200, y=400)
uEntry = Entry(sGui, textvariable=userInput).pack()
sGui.mainloop()
If i input a search for Google (GOOG) for example, I return this:
"The price of GOOG is []"
However, if i use the same code, but i print the result in a shell as opposed to using tkinter, i get the price as it should.
Any ideas anyone?

Answer 1

It appears your code isn't properly handling case. If you search for "goog" the value shows up. The problem is this line:
regex = '<span id="yfs_l84_'+searchTerm+'">(.+?)</span>'
If you type "GOOG", the regex becomes:
<span id="yfs_l84_GOOG'">(.+?)</span>
However, the html that is returned doesn't have that pattern. Doing a case-insensitive search should solve that problem:
pattern = re.compile(regex, flags=re.IGNORECASE)
Also, there's no need to create a new Label every time -- you can create the label once and then change the text each time you do a lookup.