ConnectError with Python Client when importing other CPP library first

[laurent-chriqui]

Hello,

I have the an issue with the pyproj library using Python>=3.9.

When I import pyproj first, I have the exact same issue with Pulsar. If I import pulsar first, I have a bug in pyproj when I try to do this for example:

import pulsar
import pyproj

pyproj.Transformer.from_crs('epsg:4326', 'epsg:3035')

  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.9/site-packages/pyproj/transformer.py", line 600, in from_crs
    cstrencode(CRS.from_user_input(crs_from).srs),
  File "/usr/local/lib/python3.9/site-packages/pyproj/crs/crs.py", line 501, in from_user_input
    return cls(value, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/pyproj/crs/crs.py", line 348, in __init__
    self._local.crs = _CRS(self.srs)
  File "pyproj/_crs.pyx", line 2352, in pyproj._crs._CRS.__init__
pyproj.exceptions.CRSError: Invalid projection: epsg:4326: (Internal Proj Error: proj_create: cannot build geodeticCRS 4326: cannot build unit of measure 9122: non double value)

So there seems to be some kind of conflict between cpp libraries since pyproj is also a wrapper for the PROJ cpp library and python 3.9+ I do not need to install any version of grpcio for this to happen though.

Thank you for looking into this because we are stuck at python 3.8 for now...

Also posted in pyproj here

_Originally posted by @laurent-chriqui in https://github.com/apache/pulsar-client-python/issues/53