Code

from tkinter import*
import string
import random
def generator():
    small_alphabets=string.ascii_lowercase
    numbers=string.digits
    special_characters=string.punctuation
    all=small_alphabets+capital_alphabets+numbers+special_characters
    password_Length=int(Length_box.get())
    if choice.get()==1:
        passwordFeild.insert(0,random.sample(small_alphabets,password_Length))
    if choice.get()==2:
        passwordFeild.insert(0, random.sample(small_alphabets+capital_alphabets, password_Length))
    if choice.get()==3:
        passwordFeild.insert(0, random.sample(all, password_Length))
root=Tk()
root.config(bg='gray20')
choice= IntVar()

Font=('times new roman',15,'bold')

passwordLabel=Label(root,text='PASSWORD GENERATOR',font='ariel 18 bold',bg='black',fg='white')
passwordLabel.grid(pady=10
  
Weakradiobutton=Radiobutton(root,text='weak',value='1',variable=choice,font=Font)
Weakradiobutton.grid(pady=5)

Mediumradiobutton=Radiobutton(root,text='Medium',value='2',variable=choice,font=Font)
Mediumradiobutton.grid(pady=5)

Strongradiobutton=Radiobutton(root,text='Strong',value='3',variable=choice,font=Font)
Strongradiobutton.grid(pady=5)
LengthLabel=Label(root,text='Password Length',font='ariel 18 bold',bg='black',fg='white')
LengthLabel.grid()

Length_box=Spinbox(root,from_=5,to_=18,width=5,font=Font)
Length_box.grid()
generateButton=Button(root,text='Generate',font=Font,command=generator)
generateButton.grid(pady=5)
LengthLabel=Label(root,text='Password Length',font='ariel 18 bold',bg='black',fg='white')
LengthLabel.grid()

passwordFeild=Entry(root,width=30,bd=2,font=Font)
passwordFeild.grid()

CopyButton=Button(root,text='Copy',font=Font)
CopyButton.grid(pady=5)


root.mainloop()