There are several Python packages by which we can get and set the system clipboard.

Tkinter

Use tkinter to get clipboard text.

import tkinter as tk

root = tk.TK()
root.withdraw()  # keep the window from showing

print(root.clipboard_get())

pywin32

Use pywin32. It provides the win32clipboard module.

import win32clipboard

# set the clipboard
win32clipboard.OpenClipboard()
win32clipboard.EmptyClipboard()
win32clipboard.SetClipboardText('just for a test')
win32clipboard.CloseClipboard()

# get the clipboard text
win32clipboard.OpenClipboard()
data = win32clipboard.GetClipboardData()
print(data)
win32clipboard.CloseClipboard()

pyperclip

Use pyperclip.

import pyperclip

# set the clipboard
pyperclip.copy('some text')

# get the clipboard
pyperclip.paste()

Ref