[MINOR] [Python Docs] Fix docs and comment for pyarrow.fs.S3FileSystem

[dariocurr]

Hi, I am Dario, a developer at BuildNN. First of all, thank you for your work!

Today I was trying to connect to minio using S3FileSystem.
So I tried endpoint_override="localhost:9000" as suggested in your documentation, but I got the following error:

File "pyarrow/error.pxi", line 114, in pyarrow.lib.check_status
OSError: When creating bucket 'test-bucket': AWS Error [code 99]: curlCode: 35, SSL connect error

After some tries, I discovered that the protocol prefix is required (e.g. http:\\), so when I use endpoint_override="http://localhost:9000" everything works just fine.

I guess then that the documentation is not updated

[github-actions]

Thanks for opening a pull request!

If this is not a minor PR. Could you open an issue for this pull request on JIRA? https://issues.apache.org/jira/browse/ARROW

Opening JIRAs ahead of time contributes to the Openness of the Apache Arrow project.

Then could you also rename pull request title in the following format?

ARROW-${JIRA_ID}: [${COMPONENT}] ${SUMMARY}

or

MINOR: [${COMPONENT}] ${SUMMARY}

See also:

• Other pull requests
• Contribution Guidelines - How to contribute patches

[pitrou]

After some tries, I discovered that the protocol prefix is required (e.g. http:\\), so when I use endpoint_override="http://localhost:9000" everything works just fine.

It is not. You can actually use endpoint_override="localhost:9000". The issue here is that Minio is listening in non-encrypted mode, so you must also pass scheme="http".

[dariocurr]

Thanks for the clarification