[PROTON-2518] Installing Python bindings via pip in a venv causes an ImportError

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: proton-c-0.36.0
• Component/s: python-binding
• Environment: CentOS 7 ; Python 3.8.12 (Anaconda 4.11.0) ; Using a standard venv within that. That is I created a python virtual environment inside an anaconda environment. (Not my choice but if it makes a difference I've run into the same issue without it)
• Assignee: Unassigned
• Reporter: Paul Banks
• Created: 14/Mar/22 22:51
• Updated: 17/Mar/22 19:53
• Resolved: 17/Mar/22 19:53

Description

When attempting to use the Qpid Proton libraries by installing the `python-qpid-proton` package in pip an ImportError appears related to the _cproton shared object.

I was able to recreate it with a python 3.6.8 virtual environment. The error is the same in my python 3.8.12 environment. I am attempting to run one of the provided examples.

Traceback (most recent call last):
  File "/export/home/pbanks/Downloads/qpid-proton-0.36.0/python/examples/simple_recv.py", line 22, in <module>
    from proton.handlers import MessagingHandler
  File "/export/home/pbanks/anaconda3/envs/testEnviron/lib/python3.6/site-packages/proton/__init__.py", line 35, in <module>
    from cproton import PN_VERSION_MAJOR, PN_VERSION_MINOR, PN_VERSION_POINT
  File "/export/home/pbanks/anaconda3/envs/testEnviron/lib/python3.6/site-packages/cproton.py", line 15, in <module>
    import _cproton
ImportError: /export/home/pbanks/anaconda3/envs/testEnviron/lib/python3.6/site-packages/_cproton.cpython-36m-x86_64-linux-gnu.so: undefined symbol: CRYPTO_set_locking_callback

Normally in CentOS7 I would use the Fedora provided yum package `python36-qpid-proton` as that works without issue.

My current workaround is to replace the shared object provided by the pip package with the yum package.