python tkinter how to bind key to a button

New to programming and especially python and tKinter. How can I create a way to bind the key "s" to the button or the function sharpen? Any help would be awesome.

from Tkinter import *
from PIL import Image, ImageTk, ImageFilter, ImageEnhance

class Application(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        master.wm_title("Image examples")
        self.pack()
        self.createWidgets()

def createWidgets(self):
    self.img = Image.open("lineage.jpg")
    self.photo1 = ImageTk.PhotoImage(self.img.convert("RGB"))
    self.label1 = Label(self, image=self.photo1)
    self.label1.grid(row=0, column=0, padx=5, pady=5, rowspan=10)

    self.photo2 = ImageTk.PhotoImage(self.img.convert("RGB"))
    self.label2 = Label(self, image=self.photo2)
    self.label2.grid(row=0, column=1, padx=5, pady=5, rowspan=10)

    button5 = Button(self, text="Sharpen", command=self.sharpen)
    button5.grid(row=4, column= 2, sticky = N)

def sharpen(self):
    img2 = self.img.filter(ImageFilter.SHARPEN)
    self.photo2 = ImageTk.PhotoImage(img2)
    self.label2 = Label(self, image=self.photo2)
    self.label2.grid(row=0, column=1, padx=5, pady=5, rowspan=10)

You'll need to make two changes:

1. Add

   master.bind('s', self.sharpen)
   

   to __init__. (Binding to the Frame, self, does not seem to work.)

2. When s is pressed, self.sharpen(event) will be called. Since Tkinter will be sending a Tkinter.Event object, we must also change the call signature to

   def sharpen(self, event=None):
   

   Thus, when the button is pressed, event will be set to the default value, None, but when the s key is pressed, event will be assigned to the Tkinter.Event object.

Use bind_all like this:

def sharpen(self, event):
    master.bind_all('s', sharpen)

You can find more info at the Python docs.

You can use bind. I'm going to assume the indenting in your question is wrong and sharpen is an Application method.

class Application(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        master.wm_title("Image examples")
        self.pack()
        self.createWidgets()
        self.bind("s", self.sharpen)

Pythonware has useful information about event handling.