Manipulation de bytes

#!/usr/bin/env python2
# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: Top Block
# Generated: Fri Jun  3 16:56:14 2022
##################################################

from distutils.version import StrictVersion

if __name__ == '__main__':
    import ctypes
    import sys
    if sys.platform.startswith('linux'):
        try:
            x11 = ctypes.cdll.LoadLibrary('libX11.so')
            x11.XInitThreads()
        except:
            print "Warning: failed to XInitThreads()"

from PyQt5 import Qt, QtCore
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from gnuradio.qtgui import Range, RangeWidget
from optparse import OptionParser
import osmosdr
import sys
import time
from gnuradio import qtgui


class top_block(gr.top_block, Qt.QWidget):

    def __init__(self):
        gr.top_block.__init__(self, "Top Block")
        Qt.QWidget.__init__(self)
        self.setWindowTitle("Top Block")
        qtgui.util.check_set_qss()
        try:
            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
        except:
            pass
        self.top_scroll_layout = Qt.QVBoxLayout()
        self.setLayout(self.top_scroll_layout)
        self.top_scroll = Qt.QScrollArea()
        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
        self.top_scroll_layout.addWidget(self.top_scroll)
        self.top_scroll.setWidgetResizable(True)
        self.top_widget = Qt.QWidget()
        self.top_scroll.setWidget(self.top_widget)
        self.top_layout = Qt.QVBoxLayout(self.top_widget)
        self.top_grid_layout = Qt.QGridLayout()
        self.top_layout.addLayout(self.top_grid_layout)

        self.settings = Qt.QSettings("GNU Radio", "top_block")
        self.restoreGeometry(self.settings.value("geometry", type=QtCore.QByteArray))


        ##################################################
        # Variables
        ##################################################
        self.sample_rate = sample_rate = 2e6
        self.frequency = frequency = 100e6

        ##################################################
        # Blocks
        ##################################################
        self._frequency_range = Range(1e6, 2e9, 100e3, 100e6, 200)
        self._frequency_win = RangeWidget(self._frequency_range, self.set_frequency, "frequency", "counter_slider", float)
        self.top_grid_layout.addWidget(self._frequency_win)
        self.xtrx0 = osmosdr.source( args="numchan=" + str(1) + " " + '' )
        self.xtrx0.set_sample_rate(sample_rate)
        self.xtrx0.set_center_freq(frequency, 0)
        self.xtrx0.set_freq_corr(0, 0)
        self.xtrx0.set_dc_offset_mode(2, 0)
        self.xtrx0.set_iq_balance_mode(0, 0)
        self.xtrx0.set_gain_mode(True, 0)
        self.xtrx0.set_gain(10, 0)
        self.xtrx0.set_if_gain(20, 0)
        self.xtrx0.set_bb_gain(20, 0)
        self.xtrx0.set_antenna('', 0)
        self.xtrx0.set_bandwidth(0, 0)

        self.blocks_udp_sink_0 = blocks.udp_sink(gr.sizeof_gr_complex*1, '127.0.0.1', 1234, 4, True)



        ##################################################
        # Connections
        ##################################################
        self.connect((self.xtrx0, 0), (self.blocks_udp_sink_0, 0))

    def closeEvent(self, event):
        self.settings = Qt.QSettings("GNU Radio", "top_block")
        self.settings.setValue("geometry", self.saveGeometry())
        event.accept()

    def get_sample_rate(self):
        return self.sample_rate

    def set_sample_rate(self, sample_rate):
        self.sample_rate = sample_rate
        self.xtrx0.set_sample_rate(self.sample_rate)

    def get_frequency(self):
        return self.frequency

    def set_frequency(self, frequency):
        self.frequency = frequency
        self.xtrx0.set_center_freq(self.frequency, 0)


def main(top_block_cls=top_block, options=None):

    qapp = Qt.QApplication(sys.argv)

    tb = top_block_cls()
    tb.start()
    tb.show()

    def quitting():
        tb.stop()
        tb.wait()
    qapp.aboutToQuit.connect(quitting)
    qapp.exec_()


if __name__ == '__main__':
    main()