[Python-Dev] Keyword meanings [was: Accept just PEP-0426] (original) (raw)

Vinay Sajip vinay_sajip at yahoo.co.uk
Thu Dec 6 17:30:35 CET 2012

Daniel Holth <dholth gmail.com> writes:

You have to make a maximum of 3 requests: one for the directory pointer, one for the directory, and one for the file you want. It's not particularly difficult to make an HTTP-backed seekable file object to pass to ZipFile() for this purpose but I don't have an example. Normally the last few k of the file will contain all 3 pieces. 8k or 16k would be a good guess.

I don't need an example for doing it with multiple HTTP requests. I only asked for an example because you said one could read the metadata "with a single HTTP partial request", and I couldn't see how it could always be done with a single request.

PEP 427 is mute on the subject of zip file comments in a .whl, but perhaps it shouldn't be. IIUC, the directory of the zip file could be further from the end of the file by more than 16K, due to the possible presence of a pathologically large comment in the end record.

Regards,

Vinay Sajip

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