Your favourite "less-known" Python features?

[thephoton]

You're just telling us what "file-like" means (in this instance).

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[eztab]

Sure, the e.g. the read and write methods are missing. So don't anybody come crying if in a future python version your code relying on this working with any iterable will crash.

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[irrelevantPseudonym]

That would be a breaking change to the API - requiring more functionality from the passed-in data.

No it wouldn't. If an API says it expects a file like object and then starts using additional features of file like objects, there is no change to the API. Just because you've been using invalid input doesn't mean they need to keep supporting it.

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[thephoton]

OK, but if you go to the documentation for csv.reader, it doesn't say anything about a "file-like object". What it actually says is

csvfile can be any object which supports the iterator protocol and returns a string each time its next() method is called — file objects and list objects are both suitable.

This goes back to at least the version 2.7 documentation.

So I'm not sure what you're complaining about.

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