def functions in tkinter

[Fureneshi]

I need to do something like this:

from tkinter import *
import tkinter as tk
from PIL import ImageTk, Image
import tkinter.filedialog

class ST:
    def __init__(self, char):
        self.ST = char
        self.F = Frame(char)
        self.F.place(x = 0, y = 0, width=460, height=401)

        #def
        def s():
            self.s = Canvas(self.ST)
            self.s.configure(bd=0, highlightthickness=0)
            self.s.place(x=0, y=0, width=460, height=401)
            self.s.create_image(0, 0, image=self.image, anchor=NW)
            self.s.create_text(220, 80,fill="black",font="Times 20 italic bold", text="Skill")

        s = s()

        def c():
            self.c = Canvas(self.ST)
            self.c.configure(bd=0, highlightthickness=0)
            self.c.place(x=0, y=0, width=460, height=401)
            self.c.create_image(0, 0, image=self.image, anchor=NW)
            self.c.create_text(220, 80,fill="black",font="Times 20 italic bold", text="Anne Bonny")
            self.c.create_text(220, 120,fill="black",font="Times 12 italic bold", text="   20 years old \n Loyal to Portugal")

        #Background
        self.image = PhotoImage(file="D:\\o.gif")
        self.bg = Canvas(self.ST)
        self.bg.place(x=0, y=0, width=460, height=401)
        self.bg.create_image(0, 0, image=self.image, anchor=NW)


        #Character
        self.c()

        self.imgc = ImageTk.PhotoImage(Image.open('D:\\f.png'))
        self.panelc = Label(self.ST, image = self.imgc)
        self.panelc.place(x = 59, y = 55, width=75, height=89)

        self.ST.bind("f", self.skill)
        
    def skill(self, event):
        self.panelc.place_forget()
        self.c.place_forget()
        s().place(x=0, y=0, width=460, height=401)        
        
        
char = Tk()
st = ST(char)
char.geometry("460x401")
char.wm_attributes("-transparentcolor", "yellow")
char.mainloop()

when the f key was pressed it should call def s (), but it's not working, can anyone tell me why?

show
NameError: name 's' is not defined