Traceback (most recent call last):


 "bwm.py", line 55, in <module>

import cv2
ImportError: No module named cv2

Error: Traceback (most recent call last):


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/platformio/__main__.py", line 109, in main

cli()
# pylint: disable=no-value-for-parameter


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/click/core.py", line 829, in __call__

return self.main(*args, **kwargs)


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/click/core.py", line 782, in main

rv = self.invoke(ctx)


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/platformio/commands/__init__.py", line 44, in invoke

return super(PlatformioCLI, self).invoke(ctx)


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/click/core.py", line 1259, in invoke

return _process_result(sub_ctx.command.invoke(sub_ctx))


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/click/core.py", line 1259, in invoke

return _process_result(sub_ctx.command.invoke(sub_ctx))


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/click/core.py", line 1259, in invoke

return _process_result(sub_ctx.command.invoke(sub_ctx))


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/click/core.py", line 1066, in invoke

return ctx.invoke(self.callback, **ctx.params)


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/click/core.py", line 610, in invoke

return callback(*args, **kwargs)


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/platformio/commands/remote/command.py", line 66, in remote_agent_start

from platformio.commands.remote.client.agent_service import RemoteAgentService


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/platformio/commands/remote/client/agent_service.py", line 25, in <module>

from platformio.commands.remote.client.base import RemoteClientBase


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/platformio/commands/remote/client/base.py", line 30, in <module>

from platformio.commands.remote.factory.ssl import SSLContextFactory


 "/home/pi/.platformio/penv/lib/python3.7/site-packages/platformio/commands/remote/factory/ssl.py", line 16, in <module>

from OpenSSL import SSL
# pylint: disable=import-error


 "/home/pi/.platformio/packages/contrib-pysite/OpenSSL/__init__.py", line 8, in <module>

from OpenSSL import crypto, SSL


 "/home/pi/.platformio/packages/contrib-pysite/OpenSSL/crypto.py", line 12, in <module>

from cryptography import x509


 "/home/pi/.platformio/packages/contrib-pysite/cryptography/x509/__init__.py", line 8, in <module>

from cryptography.x509.base import (


 "/home/pi/.platformio/packages/contrib-pysite/cryptography/x509/base.py", line 15, in <module>

from cryptography.hazmat.backends import _get_backend
ImportError: cannot import name '_get_backend' from 'cryptography.hazmat.backends' (/home/pi/.platformio/packages/contrib-pysite/cryptography/hazmat/backends/
