Python sys.__stderr__() Examples

def handle_error(self, request, client_address):
        """Override TCPServer method

        Error message goes to __stderr__.  No error message if exiting
        normally or socket raised EOF.  Other exceptions not handled in
        server code will cause os._exit.

        """
        try:
            raise
        except SystemExit:
            raise
        except:
            erf = sys.__stderr__
            print>>erf, '\n' + '-'*40
            print>>erf, 'Unhandled server exception!'
            print>>erf, 'Thread: %s' % threading.currentThread().getName()
            print>>erf, 'Client Address: ', client_address
            print>>erf, 'Request: ', repr(request)
            traceback.print_exc(file=erf)
            print>>erf, '\n*** Unrecoverable, server exiting!'
            print>>erf, '-'*40
            os._exit(0)

#----------------- end class RPCServer -------------------- 

def handle_error(self, request, client_address):
        """Override TCPServer method

        Error message goes to __stderr__.  No error message if exiting
        normally or socket raised EOF.  Other exceptions not handled in
        server code will cause os._exit.

        """
        try:
            raise
        except SystemExit:
            raise
        except:
            erf = sys.__stderr__
            print>>erf, '\n' + '-'*40
            print>>erf, 'Unhandled server exception!'
            print>>erf, 'Thread: %s' % threading.currentThread().getName()
            print>>erf, 'Client Address: ', client_address
            print>>erf, 'Request: ', repr(request)
            traceback.print_exc(file=erf)
            print>>erf, '\n*** Unrecoverable, server exiting!'
            print>>erf, '-'*40
            os._exit(0)

#----------------- end class RPCServer -------------------- 

def vPyDeInit():
    global oTKINTER_ROOT, sSTDOUT_FD
    if sSTDOUT_FD:
        try:
            sys.stdout = sys.__stdout__
            sys.stderr = sys.__stderr__
            sName = sSTDOUT_FD.name
            # sShowInfo('vPyDeInit', "Closing %s" % (sName,))
            sSTDOUT_FD.write('INFO : vPyDeInit ' + "Closing outfile %s\n" % (sName,))
            # oLOG.shutdown()
            sSTDOUT_FD.flush()
            sSTDOUT_FD.close()
            sSTDOUT_FD = None
        except Exception as e:
            # You probably have not stdout so no point in logging it!
            print "Error closing %s\n%s" % (sSTDOUT_FD, str(e),)
            sys.exc_clear()

    if oTKINTER_ROOT:
        oTKINTER_ROOT.destroy()
        oTKINTER_ROOT = None

    sys.exc_clear() 

def idle_showwarning(
        message, category, filename, lineno, file=None, line=None):
    """Show Idle-format warning (after replacing warnings.showwarning).

    The differences are the formatter called, the file=None replacement,
    which can be None, the capture of the consequence AttributeError,
    and the output of a hard-coded prompt.
    """
    if file is None:
        file = warning_stream
    try:
        file.write(idle_formatwarning(
                message, category, filename, lineno, line=line))
        file.write(">>> ")
    except (AttributeError, IOError):
        pass  # if file (probably __stderr__) is invalid, skip warning. 

def _rmtree(path):
        def _rmtree_inner(path):
            for name in os.listdir(path):
                fullname = os.path.join(path, name)
                try:
                    mode = os.lstat(fullname).st_mode
                except OSError as exc:
                    print("support.rmtree(): os.lstat(%r) failed with %s" % (fullname, exc),
                          file=sys.__stderr__)
                    mode = 0
                if stat.S_ISDIR(mode):
                    _waitfor(_rmtree_inner, fullname, waitall=True)
                    os.rmdir(fullname)
                else:
                    os.unlink(fullname)
        _waitfor(_rmtree_inner, path, waitall=True)
        _waitfor(os.rmdir, path) 

def test_is_enabled(self):
        orig_stderr = sys.stderr
        try:
            # regrtest may replace sys.stderr by io.StringIO object, but
            # faulthandler.enable() requires that sys.stderr has a fileno()
            # method
            sys.stderr = sys.__stderr__

            was_enabled = faulthandler.is_enabled()
            try:
                faulthandler.enable()
                self.assertTrue(faulthandler.is_enabled())
                faulthandler.disable()
                self.assertFalse(faulthandler.is_enabled())
            finally:
                if was_enabled:
                    faulthandler.enable()
                else:
                    faulthandler.disable()
        finally:
            sys.stderr = orig_stderr 

def serve_forever(self):
        '''
        Run the server forever
        '''
        self.stop_event = threading.Event()
        process.current_process()._manager_server = self
        try:
            accepter = threading.Thread(target=self.accepter)
            accepter.daemon = True
            accepter.start()
            try:
                while not self.stop_event.is_set():
                    self.stop_event.wait(1)
            except (KeyboardInterrupt, SystemExit):
                pass
        finally:
            if sys.stdout != sys.__stdout__:
                util.debug('resetting stdout, stderr')
                sys.stdout = sys.__stdout__
                sys.stderr = sys.__stderr__
            sys.exit(0) 

def handle_error(self, request, client_address):
        """Override TCPServer method

        Error message goes to __stderr__.  No error message if exiting
        normally or socket raised EOF.  Other exceptions not handled in
        server code will cause os._exit.

        """
        try:
            raise
        except SystemExit:
            raise
        except:
            erf = sys.__stderr__
            print('\n' + '-'*40, file=erf)
            print('Unhandled server exception!', file=erf)
            print('Thread: %s' % threading.current_thread().name, file=erf)
            print('Client Address: ', client_address, file=erf)
            print('Request: ', repr(request), file=erf)
            traceback.print_exc(file=erf)
            print('\n*** Unrecoverable, server exiting!', file=erf)
            print('-'*40, file=erf)
            os._exit(0)

#----------------- end class RPCServer -------------------- 

def manage_socket(address):
    for i in range(3):
        time.sleep(i)
        try:
            server = MyRPCServer(address, MyHandler)
            break
        except OSError as err:
            print("IDLE Subprocess: OSError: " + err.args[1] +
                  ", retrying....", file=sys.__stderr__)
            socket_error = err
    else:
        print("IDLE Subprocess: Connection to "
              "IDLE GUI failed, exiting.", file=sys.__stderr__)
        show_socket_error(socket_error, address)
        global exit_now
        exit_now = True
        return
    server.handle_request() # A single request only 

def destroy_crashlogfile(self):
        """Clean up the crash log file and delete it."""
        if self._crash_log_file is None:
            return
        # We use sys.__stderr__ instead of sys.stderr here so this will still
        # work when sys.stderr got replaced, e.g. by "Python Tools for Visual
        # Studio".
        if sys.__stderr__ is not None:
            faulthandler.enable(sys.__stderr__)
        else:
            faulthandler.disable()  # type: ignore[unreachable]
        try:
            self._crash_log_file.close()
            os.remove(self._crash_log_file.name)
        except OSError:
            log.destroy.exception("Could not remove crash log!") 

def manage_socket(address):
    for i in range(3):
        time.sleep(i)
        try:
            server = MyRPCServer(address, MyHandler)
            break
        except socket.error as err:
            print>>sys.__stderr__,"IDLE Subprocess: socket error: "\
                                        + err.args[1] + ", retrying...."
    else:
        print>>sys.__stderr__, "IDLE Subprocess: Connection to "\
                               "IDLE GUI failed, exiting."
        show_socket_error(err, address)
        global exit_now
        exit_now = True
        return
    server.handle_request() # A single request only 

def isatty(self):
        stream = self.__wrapped
        if 'PYCHARM_HOSTED' in os.environ:
            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
                return True
        try:
            stream_isatty = stream.isatty
        except AttributeError:
            return False
        else:
            return stream_isatty() 

def test():
    # changing sys.stdout can't be done under doctest
    if os.path.isfile('test.txt'): os.remove('test.txt')

    vPyInit('test.txt')
    assert os.path.isfile('test.txt'), "File not found: 'test.txt'"

    assert sys.stdout != sys.__stdout__
    assert sys.stderr != sys.__stderr__

    # This can't be done under doctest
    s = sPySafeEval('foobar')
    assert s.find('ERROR:') == 0
    assert s == "ERROR: name 'foobar' is not defined"

    vLog(0, "Level 0")
    vLog(1, "Level 1")
    vLog(2, "Level 2")
    vLog(3, "Level 3")
    vLog(4, "Level 4")

    # oLOG.root.setLevel(40)
    # oLOG.debug("NONONO oLOG.debug")
    # vLog(4, "NONO vLog 4")

    vPyDeInit()
    assert sys.stdout == sys.__stdout__
    assert sys.stderr == sys.__stderr__
    assert oTKINTER_ROOT is None
    assert sSTDOUT_FD is None

    # should check contents of test.txt
    oFd = open('test.txt', 'r')
    sContents = oFd.read()
    oFd.close()
    assert sContents.find("Level 4") > 0
    assert sContents.find("NONO") < 0 

def _force_disconnect():
		while True:
			try:
				await asyncio.sleep(random.randrange(24, 64))
				print('test > Force disconnect')
				await client.ws.close()
			except Exception as ex:
				print("Exception at exit: {}".format(ex), sys.__stderr__) 

def poll_subprocess(self):
        clt = self.rpcclt
        if clt is None:
            return
        try:
            response = clt.pollresponse(self.active_seq, wait=0.05)
        except (EOFError, OSError, KeyboardInterrupt):
            # lost connection or subprocess terminated itself, restart
            # [the KBI is from rpc.SocketIO.handle_EOF()]
            if self.tkconsole.closing:
                return
            response = None
            self.restart_subprocess()
        if response:
            self.tkconsole.resetoutput()
            self.active_seq = None
            how, what = response
            console = self.tkconsole.console
            if how == "OK":
                if what is not None:
                    print(repr(what), file=console)
            elif how == "EXCEPTION":
                if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
                    self.remote_stack_viewer()
            elif how == "ERROR":
                errmsg = "PyShell.ModifiedInterpreter: Subprocess ERROR:\n"
                print(errmsg, what, file=sys.__stderr__)
                print(errmsg, what, file=console)
            # we received a response to the currently active seq number:
            try:
                self.tkconsole.endexecuting()
            except AttributeError:  # shell may have closed
                pass
        # Reschedule myself
        if not self.tkconsole.closing:
            self._afterid = self.tkconsole.text.after(
                self.tkconsole.pollinterval, self.poll_subprocess) 

def pollmessage(self, wait):
        packet = self.pollpacket(wait)
        if packet is None:
            return None
        try:
            message = pickle.loads(packet)
        except pickle.UnpicklingError:
            print("-----------------------", file=sys.__stderr__)
            print("cannot unpickle packet:", repr(packet), file=sys.__stderr__)
            traceback.print_stack(file=sys.__stderr__)
            print("-----------------------", file=sys.__stderr__)
            raise
        return message 

def putmessage(self, message):
        self.debug("putmessage:%d:" % message[0])
        try:
            s = dumps(message)
        except pickle.PicklingError:
            print("Cannot pickle:", repr(message), file=sys.__stderr__)
            raise
        s = struct.pack("<i", len(s)) + s
        while len(s) > 0:
            try:
                r, w, x = select.select([], [self.sock], [])
                n = self.sock.send(s[:BUFSIZE])
            except (AttributeError, TypeError):
                raise OSError("socket no longer exists")
            s = s[n:] 

def debug(self, *args):
        if not self.debugging:
            return
        s = self.location + " " + str(threading.current_thread().name)
        for a in args:
            s = s + " " + str(a)
        print(s, file=sys.__stderr__) 

def accept(self):
        working_sock, address = self.listening_sock.accept()
        if self.debugging:
            print("****** Connection request from ", address, file=sys.__stderr__)
        if address[0] == LOCALHOST:
            SocketIO.__init__(self, working_sock)
        else:
            print("** Invalid host: ", address, file=sys.__stderr__)
            raise OSError 

def run(self):
        """
        main run entrance
        """
        self.name = "pylane-shell-thread"
        try:
            self.sock.connect()
            self.handle()
        except SystemExit:
            pass
        except:
            traceback.print_exc(file=sys.__stderr__)
        finally:
            if self.sock:
                self.sock.close() 

def isatty(self):
        stream = self.__wrapped
        if 'PYCHARM_HOSTED' in os.environ:
            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
                return True
        try:
            stream_isatty = stream.isatty
        except AttributeError:
            return False
        else:
            return stream_isatty() 

def enable_print():
    """Enable console output, ``suppress_stdout`` is recommended.

    Examples
    --------
    - see tl.ops.disable_print()
    """
    sys.stdout = sys.__stdout__
    sys.stderr = sys.__stderr__


# class temporary_disable_print:
#     """Temporarily disable console output.
#
#     Examples
#     ---------
#     >>> print("You can see me")
#     >>> with tl.ops.temporary_disable_print() as t:
#     >>>     print("You can't see me")
#     >>> print("You can see me")
#     """
#     def __init__(self):
#         pass
#     def __enter__(self):
#         sys.stdout = None
#         sys.stderr = os.devnull
#     def __exit__(self, type, value, traceback):
#         sys.stdout = sys.__stdout__
#         sys.stderr = sys.__stderr__
#         return isinstance(value, TypeError) 

def Debug(msg):
     print('Kernel main: %r' % msg, file=sys.__stderr__) 

def isatty(self):
        stream = self.__wrapped
        if 'PYCHARM_HOSTED' in os.environ:
            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
                return True
        try:
            stream_isatty = stream.isatty
        except AttributeError:
            return False
        else:
            return stream_isatty() 

def isatty(self):
        stream = self.__wrapped
        if 'PYCHARM_HOSTED' in os.environ:
            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
                return True
        try:
            stream_isatty = stream.isatty
        except AttributeError:
            return False
        else:
            return stream_isatty() 

def debug(self, *args):
        if not self.debugging:
            return
        s = self.location + " " + str(threading.currentThread().getName())
        for a in args:
            s = s + " " + str(a)
        print>>sys.__stderr__, s 

def localcall(self, seq, request):
        self.debug("localcall:", request)
        try:
            how, (oid, methodname, args, kwargs) = request
        except TypeError:
            return ("ERROR", "Bad request format")
        if oid not in self.objtable:
            return ("ERROR", "Unknown object id: %r" % (oid,))
        obj = self.objtable[oid]
        if methodname == "__methods__":
            methods = {}
            _getmethods(obj, methods)
            return ("OK", methods)
        if methodname == "__attributes__":
            attributes = {}
            _getattributes(obj, attributes)
            return ("OK", attributes)
        if not hasattr(obj, methodname):
            return ("ERROR", "Unsupported method name: %r" % (methodname,))
        method = getattr(obj, methodname)
        try:
            if how == 'CALL':
                ret = method(*args, **kwargs)
                if isinstance(ret, RemoteObject):
                    ret = remoteref(ret)
                return ("OK", ret)
            elif how == 'QUEUE':
                request_queue.put((seq, (method, args, kwargs)))
                return("QUEUED", None)
            else:
                return ("ERROR", "Unsupported message type: %s" % how)
        except SystemExit:
            raise
        except socket.error:
            raise
        except:
            msg = "*** Internal Error: rpc.py:SocketIO.localcall()\n\n"\
                  " Object: %s \n Method: %s \n Args: %s\n"
            print>>sys.__stderr__, msg % (oid, method, args)
            traceback.print_exc(file=sys.__stderr__)
            return ("EXCEPTION", None) 

def pollmessage(self, wait):
        packet = self.pollpacket(wait)
        if packet is None:
            return None
        try:
            message = pickle.loads(packet)
        except pickle.UnpicklingError:
            print >>sys.__stderr__, "-----------------------"
            print >>sys.__stderr__, "cannot unpickle packet:", repr(packet)
            traceback.print_stack(file=sys.__stderr__)
            print >>sys.__stderr__, "-----------------------"
            raise
        return message 

def accept(self):
        working_sock, address = self.listening_sock.accept()
        if self.debugging:
            print>>sys.__stderr__, "****** Connection request from ", address
        if address[0] == LOCALHOST:
            SocketIO.__init__(self, working_sock)
        else:
            print>>sys.__stderr__, "** Invalid host: ", address
            raise socket.error 

def handle_error(self, request, client_address):
        """Override RPCServer method for IDLE

        Interrupt the MainThread and exit server if link is dropped.

        """
        global quitting
        try:
            raise
        except SystemExit:
            raise
        except EOFError:
            global exit_now
            exit_now = True
            thread.interrupt_main()
        except:
            erf = sys.__stderr__
            print>>erf, '\n' + '-'*40
            print>>erf, 'Unhandled server exception!'
            print>>erf, 'Thread: %s' % threading.currentThread().getName()
            print>>erf, 'Client Address: ', client_address
            print>>erf, 'Request: ', repr(request)
            traceback.print_exc(file=erf)
            print>>erf, '\n*** Unrecoverable, server exiting!'
            print>>erf, '-'*40
            quitting = True
            thread.interrupt_main()