Softwareentwicklung

import binascii
import time
import sys


class SendTcp:
    def __init__(self):
        self.t_end = time.time() + 60 * 4
        # Create a TCP/IP socket
        self.sock = socket.socket(socket.AF_INET,
                                   socket.SOCK_STREAM)

    def receive_data(self):
        data = self.sock.recv(2048)
        data_receive = data.decode()
        if not data_receive:
            sys.exit(0)
        data_ = data_receive.rsplit(",")[0:-1]
        print("received {!r}".format(data))
        data_string = ",".join(data_)
        crc_d = self.calc_crc(data_string.encode())
        cr = data_receive.rsplit(",", 1)[1]
        self.check_crc(crc_d, cr)
        print("closing socket")
        self.sock.close()