pyyaml is a required dependency?

[sidneygijzen]

On upgrading from version 1.1.3 to 1.3.0 my app generates the following error ModuleNotFoundError: No module named 'yaml'.

While researching it a bit further, I could trace it back to this commit. I also saw pyyaml is currently in the extras_require list in setup.py. I am wondering, is pyyaml now a required dependency with the introduction of the dict_to_yaml import in the aforementioned commit?

When downgrading to version 1.2.3, the app works without any problems.

Environment:

• Python version: 3.7 (via docker image: python:3.7-slim-bullseye)
• Flask version: 2.2.3
• APIFlask version: 1.3.0

Stack trace:

File "/app/src/app/__init__.py", line 3, in <module>
  from apiflask import APIFlask
File "/opt/venv/lib/python3.7/site-packages/apiflask/__init__.py", line 3, in <module>
  from .app import APIFlask as APIFlask
File "/opt/venv/lib/python3.7/site-packages/apiflask/app.py", line 16, in <module>
  from apispec.yaml_utils import dict_to_yaml
File "/opt/venv/lib/python3.7/site-packages/apispec/yaml_utils.py", line 5, in <module>
  import yaml
ModuleNotFoundError: No module named 'yaml'

[greyli]

Thanks for reporting this! It has been fixed in 1.3.1:

pip install -U apiflask

[sidneygijzen]

Thanks for the quick fix & release 👍