Tornado x msgpack-rpc-python 0.4.1 incompatibility when connection to Airsim simulator

[tanyaspaul]

Hello there,

I have some dependencies issues with the API , when I try to connect to the Airsim simulator. I have this error :

Output exceeds the size limit. Open the full output data in a text editor

TypeError Traceback (most recent call last)
Cell In [15], line 2
1 # connect to the AirSim simulator
----> 2 client = airsim.MultirotorClient()
3 client.confirmConnection()
4 client.enableApiControl(True)

File ~/anaconda3/envs/py38/lib/python3.8/site-packages/airsim/client.py:1119, in MultirotorClient.init(self, ip, port, timeout_value)
1118 def init(self, ip = "", port = 41451, timeout_value = 3600):
-> 1119 super(MultirotorClient, self).init(ip, port, timeout_value)

File ~/anaconda3/envs/py38/lib/python3.8/site-packages/airsim/client.py:17, in VehicleClient.init(self, ip, port, timeout_value)
15 if (ip == ""):
16 ip = "127.0.0.1"
---> 17 self.client = msgpackrpc.Client(msgpackrpc.Address(ip, port), timeout = timeout_value, pack_encoding = 'utf-8', unpack_encoding = 'utf-8')

File ~/anaconda3/envs/py38/lib/python3.8/site-packages/msgpackrpc/client.py:15, in Client.init(self, address, timeout, loop, builder, reconnect_limit, pack_encoding, unpack_encoding)
12 session.Session.init(self, address, timeout, loop, builder, reconnect_limit, pack_encoding, unpack_encoding)
14 if timeout:
---> 15 loop.attach_periodic_callback(self.step_timeout, 1000)

File ~/anaconda3/envs/py38/lib/python3.8/site-packages/msgpackrpc/loop.py:39, in Loop.attach_periodic_callback(self, callback, callback_time)
36 self.dettach_periodic_callback()
38 self._periodic_callback = ioloop.PeriodicCallback(callback, callback_time, self._ioloop)
...
942 # at once, so it's ok to write even when not strictly
943 # necessary.
944 self._waker.wake()

TypeError: unsupported operand type(s) for *: 'ZMQIOLoop' and 'float'

---

However, when I check microsoft documentation they mention :
When making API call I get error#
If you are getting this error,

*TypeError: unsupported operand type(s) for : 'AsyncIOLoop' and 'float'

its probably due to upgraded version of tornado package with version > 5.0 in Python that conflicts with msgpack-rpc-python which requires tornado package < 5.0. To fix this >you can update the package like this:

pip install --upgrade msgpack-rpc-python

But this might break something (for example, PyTorch 0.4+) because it will uninstall newer tornado and re-install older one. To avoid this you should create new conda >environment.

Now it gets more tricky because when I check my dependencies I receive this error:

ERROR

• ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
• nbclassic 0.4.8 requires tornado>=6.1, but you have tornado 4.5.3 which is incompatible.
• jupyter-server 1.21.0 requires tornado>=6.1.0, but you have tornado 4.5.3 which is incompatible.
• jupyter-client 7.4.7 requires tornado>=6.2, but you have tornado 4.5.3 which is incompatible.
• ipyparallel 8.4.1 requires tornado>=5.1, but you have tornado 4.5.3 which is incompatible.
• ipykernel 6.15.2 requires tornado>=6.1, but you have tornado 4.5.3 which is incompatible.

HOWEVER when I try to upgrate tornado I get this error:

• ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
  msgpack-rpc-python 0.4.1 requires tornado<5,>=3, but you have tornado 6.2 which is incompatible.

---

Background information:

• Linux
• Ubuntu 20.04
• Coding in Visual Studio
• Environement py38 (3.8.15)

I have been stuck on this for a while trying to fixe those dependencies problem but only circular solution.

Any help is appreciated!!

Thanks so much,