alanorth opened a new issue, #22571:
URL: https://github.com/apache/superset/issues/22571
Trying to install Superset 2.0.1 in a fresh Python 3.8.10 virtual
environment fails with ModuleNotFoundError.
#### How to reproduce the bug
```console
# su - superset
$ python3.8 -m venv venv
$ source ./venv/bin/activate
$ pip install --upgrade setuptools pip wheel
$ pip install apache-superset==2.0.1
$ export PYTHONPATH=/home/superset
$ export FLASK_APP=superset
$ superset
Traceback (most recent call last):
File "/home/superset/venv/bin/superset", line 5, in <module>
from superset.cli.main import superset
File
"/home/superset/venv/lib/python3.8/site-packages/superset/__init__.py", line
21, in <module>
from superset.app import create_app
File "/home/superset/venv/lib/python3.8/site-packages/superset/app.py",
line 23, in <module>
from superset.initialization import SupersetAppInitializer
File
"/home/superset/venv/lib/python3.8/site-packages/superset/initialization/__init__.py",
line 33, in <module>
from superset.extensions import (
File
"/home/superset/venv/lib/python3.8/site-packages/superset/extensions/__init__.py",
line 32, in <module>
from superset.utils.cache_manager import CacheManager
File
"/home/superset/venv/lib/python3.8/site-packages/superset/utils/cache_manager.py",
line 24, in <module>
from superset.utils.core import DatasourceType
File
"/home/superset/venv/lib/python3.8/site-packages/superset/utils/core.py", line
76, in <module>
from cryptography.hazmat.backends.openssl.x509 import _Certificate
ModuleNotFoundError: No module named
'cryptography.hazmat.backends.openssl.x509'
```
But clearly `cryptography` is installed:
```console
$ pip install cryptography
Requirement already satisfied: cryptography in
./venv/lib/python3.8/site-packages (39.0.0)
Requirement already satisfied: cffi>=1.12 in
./venv/lib/python3.8/site-packages (from cryptography) (1.15.1)
Requirement already satisfied: pycparser in
./venv/lib/python3.8/site-packages (from cffi>=1.12->cryptography) (2.21)
```
### Expected results
Superset runs.
### Actual results
ModuleNotFoundError from Python.
### Environment
Systems is Ubuntu 20.04 "focal" with Python 3.8.10.
### Checklist
- [x] I have checked the superset logs for python stacktraces and included
it here as text if there are any.
- [x] I have reproduced the issue with at least the latest released version
of superset.
- [x] I have checked the issue tracker for the same issue and I haven't
found one similar.
### Additional context
The system is currently running Superset 2.0.0 fine in another virtualenv.
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