So I made a simple program however it doesn't seem to work my code is:

e = Entry(root, font = 20,borderwidth=5)e.grid(row=1)def capture(event):print(e.get())e.bind("<Key>", capture)

However the first time I enter something in the box, all I get is an empty string.

As @Art stated:

You can use "<KeyRelease>", e.bind("<Key>", lambda event: e.after(1, capture, event))" or simply Use StringVar()

from tkinter import *
root=Tk()
e = Entry(root, font = 20,borderwidth=5)
e.grid(row=1)
def capture(event):print(e.get())
e.bind("<Key>", lambda event: e.after(1, capture, event))
root.mainloop()

Or you can use a StringVar()

from tkinter import *
root=Tk()
s=StringVar()
e = Entry(root,textvariable=s, font = 20,borderwidth=5)
e.grid(row=1)
def capture(*args):print(s.get())
s.trace("w",capture)
root.mainloop()