Update start.rst

[danbachar]

add virtualenv as a requirement

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache Airflow community! If you have any issues or are unsure about any anything please check our Contributors' Guide (https://github.com/apache/airflow/blob/main/contributing-docs/README.rst)
Here are some useful points:

• Pay attention to the quality of your code (ruff, mypy and type annotations). Our pre-commits will help you with that.
• In case of a new feature add useful documentation (in docstrings or in docs/ directory). Adding a new operator? Check this short guide Consider adding an example DAG that shows how users should use it.
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[dirrao]

Not necessarily, virtualenv recommended way to install it.

[danbachar]

Without virtualenv the DAG mentioned in the tutorial does not exist. Get Outlook for Android<https://aka.ms/AAb9ysg>

________________________________ From: Gopal Dirisala ***@***.***> Sent: Tuesday, January 30, 2024 5:03:27 PM To: apache/airflow ***@***.***> Cc: Dan Bachar ***@***.***>; Author ***@***.***> Subject: Re: [apache/airflow] Update start.rst (PR #37098) @dirrao commented on this pull request.

________________________________ In docs/apache-airflow/start.rst<#37098 (comment)>:

@@ -24,7 +24,7 @@ This quick start guide will help you bootstrap an Airflow standalone instance on

.. note:: - Successful installation requires a Python 3 environment. Starting with Airflow 2.7.0, Airflow supports Python 3.8, 3.9, 3.10 and 3.11. + Successful installation requires a Python 3 environment, along with virtualenv. Starting with Airflow 2.7.0, Airflow supports Python 3.8, 3.9, 3.10 and 3.11. Not necessarily, virtualenv recommended way to install it. — Reply to this email directly, view it on GitHub<#37098 (review)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AECHNJADZZI4VNBUE6RLDCDYREKU7AVCNFSM6AAAAABCROTYS6VHI2DSMVQWIX3LMV43YUDVNRWFEZLROVSXG5CSMV3GSZLXHMYTQNJRG4YTCNZYGU>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[Taragolis]

Virtual environment it is not a strict requirement it is only highly suggested into the non isolated environment. For example you could easily use Airflow which installed into the userspace into the Docker, that how it installed into the Official Airflow Images.

There is difficult to recognise what is going wrong in your case it could be:

• Conflicting packages with system packages (if it installed as a root as system package)
• Conflicting packages into the userspaces
• Missing [core] load_examples config
• etc

[potiuk]

I think the issue is different. You shoudl add note that some examples might not work if you do not install it with [virtualenv] extra. You do not technically need virtualenv to install airflow, but if you want to look at example dags and get them all working you need to install airflow[virtualenv]. There is a subtle difference between the two

https://airflow.apache.org/docs/apache-airflow/stable/extra-packages-ref.html#core-airflow-extras - airflow has different extras and virtualenv is one of them.

[github-actions]

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