"""
Embedded Python Blocks:

Each this file is saved, GRC will instantiate the first class it finds to get
ports and parameters of your block. The arguments to __init__  will be the
parameters. All of them are required to have default values!
"""
import numpy as np
import sys
from gnuradio import gr

class blk(gr.sync_block):
    def __init__(self, enabler=False):  # only default arguments here
        gr.sync_block.__init__(
            self,
            name='Embedded Python Block',
            in_sig=[np.float32],
            out_sig=[np.float32]
        )
        self.enabler = enabler

    def work(self, input_items, output_items):
	key = sys.stdin.read(1)

	if key==' ':
		self.enabler=True
		
	if self.enabler == True:
        	output_items[0][:] = input_items[0]
        	return len(output_items[0])

"""Created by Abdul Samad Usman"""