gistfile1.py

# this little script helps me enter bitcoin addresses in bitcoin-core.
# It enters an address that I scan, skips to the value field, enters 3
# and adds another recipient. I made it to charge paper wallets with 3mɃ.

import os
import time
from subprocess import Popen, PIPE

upper_pattern='xte "keydown Shift_L" "key {}" "keyup Shift_L"'
default_pattern='xte "key {}"'

ord_A=ord("A")
ord_Z=ord("Z")
def echochar(char):
	pattern=default_pattern
	if len(char) == 1 and ord(char) >= ord_A and ord(char) <= ord_Z:
		pattern=upper_pattern
	os.system(pattern.format(char))

def echostr(str):
	for char in str:
		echochar(char)

p = Popen(['zbarcam', '--raw'], stdout=PIPE, stderr=PIPE, stdin=PIPE)

while True:
	time.sleep(0.1)
	code = p.stdout.readline().strip()
	print('Got barcode: {}'.format(code))
	echostr(code)
	echochar("Tab")
	echochar("Tab")
	echostr("3")
	os.system('xte "keydown Alt_L" "key r" "keyup Alt_L"')