OT: need python help please

[Roger]

My daughter wants to teach her students tkinter interface with python.

She cannot get an entry into the field   entry1=Entry(fishDisplay, 
width=35).grid(row=0, column=1)
to display and this is out of my expertise. Can someone point us to a 
suitable tutorial on how to get test in a tk field into a variable and 
how to display it.

I ran Idle debug and the result from entry1 is None.

Part of the little app she wrote is as follows.
Please help if possible.
thanks in advance
Roger

from fish import *
from tkinter import *

def searchFish():

     def fishies(*args):
         #names
         siamon   = fish[0][0]
         goldfish = fish[1][0]
         norbert  = fish[2][0]
         slug     = fish[3][0]
         snail    = fish[4][0]
         howzart  = fish[5][0]
         fidget   = fish[6][0]
         #aggressive
         siamon_a   = fish[0][1]
         goldfish_a = fish[1][1]
         norbert_a  = fish[2][1]
         slug_a     = fish[3][1]
         snail_a    = fish[4][1]
         howzart_a  = fish[5][1]
         fidget_a   = fish[6][1]
         #habit
         siamon_h   = fish[0][2]
         goldfish_h = fish[1][2]
         norbert_h  = fish[2][2]
         slug_h     = fish[3][2]
         snail_h    = fish[4][2]
         howzart_h  = fish[5][2]
         fidget_h   = fish[6][2]

         if entry1=="Goldfish":
             details=Label(fishDisplay, bg='lightblue', 
text='Goldfish').grid(row=3, column=1)



        #print(goldfish[0], goldfish_a[0],goldfish_h[0]) #use the [0] to 
remove the ['']'s when printed
     #### THE START OF THE TKINTERFACE ####

     # sf = searchFish
     sf = Tk()
     sf.title('Jackson\'s Pond Emporium >> Search A Fish')
     sf.geometry("500x400")
     sf['background']='lightblue'

     window=Frame(sf).pack()

     green = PhotoImage(file='GreenFish.gif', master=sf)

     topFrame = Frame(window, bg='lightblue').pack(side=TOP, anchor=NW)
     newfont = ('arial', 20, 'bold')
     g = Label(topFrame, image=green, bg='lightblue').pack(side=LEFT, 
anchor=NW, padx=2, pady=2)
     title = Label(topFrame, text = 'Fishbase', font = newfont, 
bg='lightblue')
     title.config(height=3, width=3)
     title.pack(side=TOP, fill=BOTH)

     fishDisplay = Canvas(window, bg='lightblue')

     Label(fishDisplay, text='Keyword:', bg='lightblue', 
fg='black').grid(row=0, column=0, sticky=W)
     entry1=Entry(fishDisplay, width=35).grid(row=0, column=1)
     btn_search=Button(fishDisplay, width=6, text='Search', 
command=fishies).grid(row=0, column=3)

     Label(fishDisplay, text='Details:', bg='lightblue', 
fg='black').grid(row=2, column=0, sticky=W)
     details=Label(fishDisplay, bg='lightblue', text='Search the 
Fishbase').grid(row=2, column=1)
     fishDisplay.pack(side=TOP, anchor=W, fill=X)

     sf.bind('<Return>', fishies)
     print('entry1 ',entry1)
     sf.mainloop()