name 'client socket' is not defined

[BackhaSe]

Hello, My script throws an error when I call me.Connect().

Code:

from djitellopy import Tello
import cv2
import threading
import time

# Image settings
useCamera = 1  # 0 for not using camera and 1 for streaming
width = 640  # width of the image
height = 480  # height of the image

# Flight settings
startCounter = 0  # 0 for testing and 1 for flying

# Thread settings
exitFlag = 0

# Connect to Tello drone
me = Tello()
me.connect()  # This is line 23, error starts here
me.for_back_velocity = 0
me.left_right_velocity = 0
me.up_down_velocity = 0
me.yaw_velocity = 0
me.speed = 0
...

Error: [INFO] tello.py - 424 - Send command: command Traceback (most recent call last): File "C:\X\PycharmProjects\TelloProject\TelloDemo.py", line 23, in me.connect() File "C:\X\PycharmProjects\DJITelloPy\djitellopy\enforce_types.py", line 45, in wrapper return func(*args, kwargs) File "C:\X\PycharmProjects\DJITelloPy\djitellopy\tello.py", line 518, in connect self.send_control_command("command") File "C:\X\PycharmProjects\DJITelloPy\djitellopy\enforce_types.py", line 45, in wrapper return func(*args, *kwargs) File "C:\X\PycharmProjects\DJITelloPy\djitellopy\tello.py", line 460, in send_control_command response = self.send_command_with_return(command, timeout=timeout) File "C:\X\PycharmProjects\DJITelloPy\djitellopy\enforce_types.py", line 45, in wrapper return func(args, kwargs) File "C:\X\PycharmProjects\DJITelloPy\djitellopy\tello.py", line 427, in send_command_with_return client_socket.sendto(command.encode('utf-8'), self.address) NameError: name 'client_socket' is not defined

I'm using PyCharm with Python 3.9 interpreter. As for packages I tried to install the required opencv-python and numpy versions, but I get the error:

ERROR: Could not find a version that satisfies the requirement opencv-python==3.4.3.18 ERROR: No matching distribution found for opencv-python==3.4.3.18

So currently I'm using the closest version I could install (3.4.13.47)

As for my setup I'm using Windows10, i7 and a GTX960. My computer is connected to the internet via LAN and I connect to the drone via WiFi. The drone is calibrated and its' software is up to date. I've had this error for quite some time, but while i talked to a friend of mine via discord this error didn't appear at all. Do I have to specify somewhere, which connection or socket PyCharm is supposed to use while executing my code? If yes, where can I do that? And are the required versions for opencv-python and numpy mandatory or can I use the latest versions as well?

with kind regards

[M4GNV5]

Hey,

the client_socket variable is created by a thread started in the constructor and used in send_command_with_return which is used by command. I guess this is a race condition where the new thread has not been executed yet and thus the client_socket has not been created yet when the call to me.command() occurs.

My only guess is that python changed their scheduling behaviour in 3.9 as it works fine with older versions. I pushed commit f1c1344d9475bb564f33fa2f87d0131cab7894bd (see above) which should fix it. Can you verify this resolves your issue?

[BackhaSe]

Hello M4GNV5,

I tested yesterday and today a few times and haven't had the client socket - error again. Thank you for this fix.

with kind regard