You will want to pass pyperclip.paste() the same place you would place a string for your entry or text widget inserts.

Take a look at this example code.

There is a button to copy what is in the entry field and one to paste to entry field.

import tkinter as tk
from tkinter import ttk
import pyperclip

root = tk.Tk()

some_entry = tk.Entry(root)
some_entry.pack()

def update_btn():
    global some_entry
    pyperclip.copy(some_entry.get())

def update_btn_2():
    global some_entry
    # for the insert method the 2nd argument is always the string to be
    # inserted to the Entry field.
    some_entry.insert(tk.END, pyperclip.paste())

btn = ttk.Button(root, text="Copy to clipboard", command = update_btn)
btn.pack()

btn2 = ttk.Button(root, text="Paste current clipboard", command = update_btn_2)
btn2.pack()


root.mainloop()

Alternatively you could just do Ctrl+V :D

If you want to copy something from the python console: Highlight what you want to copy and right click on the top border of the python console>edit>copy

If you want to paste into python console window: Make sure the coping mentioned above is the last action taken, and you will be able to simply right click I'm the python console window black area and it will automatically paste. You can also right click on the top border and follow the >edit>paste menu item.

Hope that helps.

See Pyperclip. Example (taken from Pyperclip site):

import pyperclip
pyperclip.copy('The text to be copied to the clipboard.')
spam = pyperclip.paste()

Also, see Xerox. But it appears to have more dependencies.