[GitHub] [superset] alonsogtouch commented on issue #22571: ModuleNotFoundError installing Superset 2.0.1 in a fresh virtual environment

["alonsogtouch (via GitHub)" <gi...@apache.org>]

alonsogtouch commented on issue #22571:
URL: https://github.com/apache/superset/issues/22571#issuecomment-1404717605

   I got the same error on Fedora 37.
   
   Just so you know I couldn't get it to work with Python default version on Fedora (3.11) since it's not compatible with lots of libraries and dependencies in Superset.
   
   In case anyone is interested I first had to build Python 3.8 from source:
   
   ```
   wget https://www.python.org/ftp/python/3.8.16/Python-3.8.16.tgz
   tar xzf Python-3.8.16.tgz Python-3.8.16/
   cd Python-3.8.16/
   ./configure --enable-optimizations --with-ensurepip=install
   sudo make altinstall
   ```
   
   This last line helps you leave your system-wide Python 3.11 intact. You can run python3.8 after that
   and create a superset virtual enrivonment using
   
   `python3.8 -m venv superset`
   
   After activating the new virtual environment and installing apache-superset with pip I got errors when I ran 
   
   `superset db upgrade`
   
    as stated in the documentation (https://superset.apache.org/docs/installation/installing-superset-from-scratch/):
   
   ```
   (superset) [alonso@fedora pythonvenvs]$ superset db upgrade
   /home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/pandas/compat/__init__.py:124: UserWarning: Could not import the lzma module. Your installed Python is incomplete. Attempting to use lzma compression will result in a RuntimeError.
     warnings.warn(msg)
   Traceback (most recent call last):
     File "/home/alonso/pythonvenvs/superset/bin/superset", line 5, in <module>
       from superset.cli.main import superset
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/__init__.py", line 21, in <module>
       from superset.app import create_app
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/app.py", line 23, in <module>
       from superset.initialization import SupersetAppInitializer
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/initialization/__init__.py", line 33, in <module>
       from superset.extensions import (
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/extensions/__init__.py", line 32, in <module>
       from superset.utils.cache_manager import CacheManager
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/utils/cache_manager.py", line 24, in <module>
       from superset.utils.core import DatasourceType
     File "/home/alonso/pythonvenvs/superset/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'
   ```
   
   In order to fix this I had to run the lines @zhaoyongjie provided, which I reproduce below:
   
   > @alanorth try this snippet
   > 
   > ```
   > pip uninstall cryptography
   > pip uninstall pyopenssl
   > pip install cryptography==3.4.7
   > ```
   
   After that I ran
   
   ```
   export FLASK_APP=superset
   superset db upgrade
   ```
   
   And I got the following errors:
   
   ```
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/initialization/__init__.py", line 476, in configure_data_sources
       ConnectorRegistry.register_sources(module_datasource_map)
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/connectors/connector_registry.py", line 42, in register_sources
       module_obj = __import__(module_name, fromlist=class_names)
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/connectors/sqla/__init__.py", line 17, in <module>
       from . import models, views
     File "/home/alonso/pythonvenvs/superset/lib/python3.8/site-packages/superset/connectors/sqla/views.py", line 28, in <module>
       from wtforms.ext.sqlalchemy.fields import QuerySelectField
   ModuleNotFoundError: No module named 'wtforms.ext'
   ```
   
   @jsanko9 helped with this, I'm partly quoting the reply:
   
   > > ```
   > > pip uninstall WTForms 
   > > pip install WTForms==2.3.2
   > > ```
   
   
   With that I could successfully run
   
   `superset db upgrade`
   


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