Reads and copies a file line by line whenever a user pastes.

autocopypaste.py

#!/usr/bin/env python3

import sys
import pyperclip
import platform
from pynput import keyboard

# Paste key combination
if platform.system() == 'Darwin':  # Mac
    COMBINATION = {keyboard.Key.cmd, keyboard.KeyCode(char='v')}
else:  # Linux and Windows
    COMBINATION = {keyboard.Key.ctrl, keyboard.KeyCode(char='v')}
current = set()

paste_detected = False


# Detect if user pasted something.
def on_press(key):
    global paste_detected
    if key in COMBINATION:
        current.add(key)
        if all(k in current for k in COMBINATION):
            paste_detected = True
            print('Paste detected!\n')


def on_release(key):
    try:
        current.remove(key)
    except KeyError:
        pass


# Monitor the keyboard in a non-blocking fashion.
listener = keyboard.Listener(
    on_press=on_press,
    on_release=on_release)
listener.start()

# Get filepath as first argument.
try:
    filepath = sys.argv[1]
except IndexError:
    print("Error: No file specified.")
    sys.exit()

with open(filepath) as file:
    line = file.readline().strip()

    while line:
        # Copy one line
        pyperclip.copy(line)
        print("Copied: " + line)
        while True:
            if paste_detected:
                # Read next line
                line = file.readline().strip()
                paste_detected = False
                break

# Stop monitoring the keyboard and prompt user.
listener.stop()
print("End of file. No more lines to copy!")