<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def read(self, len=1024, buffer=None):
 """Read data from connection Read up to len bytes and return them. Arguments: len -- maximum number of bytes to read Return value: string containing read bytes """


        try:
            return self._wrap_socket_library_call(
                lambda: SSL_read(self._ssl.value, len, buffer), ERR_READ_TIMEOUT)
        except openssl_error() as err:
            if err.ssl_error == SSL_ERROR_SYSCALL and err.result == -1:
                raise_ssl_error(ERR_PORT_UNREACHABLE, err)
            raise