[Python-Dev] Fwd: zipimport

Rose Ames rose at happyspork.com
Wed Jun 3 00:41:04 CEST 2015

Writing it in Python did come up and was decided against, but I don't 
recall the reasoning.  Could it have been a performance thing?

On 06/02/2015 06:11 PM, Eric V. Smith wrote:
> On 6/2/2015 5:20 PM, Brett Cannon wrote:
>> On Tue, Jun 2, 2015 at 5:04 PM Rose Ames <rose at happyspork.com
>> <mailto:rose at happyspork.com>> wrote:
>>      At pycon I talked with a few people about bugs.python.org/issue19699
>>      <http://bugs.python.org/issue19699>.
>>      The consensus seemed to be that zipimport wants a lot of work, possibly
>>      a rewrite.
>>      I'll have some time to work on this over the next couple of months, but
>>      I want to be working on the right thing.  Could the people who were
>>      involved in that conversation remind me of their concerns with
>>      zipimport?  What exactly would the goal of a rewrite be?
>> I believe the participants consisted of Thomas Wouters, Greg Smith, Eric
>> Snow, Nick Coghlan, and myself. In the end I think the general consensus
>> for long-term maintenance was to write the minimal amount of code
>> required that could read zip files and then write all of the
>> import-related code on top of that. Basically the idea of freezing
>> zipfile seemed messy since it has a ton of dependencies and baggage that
>> simply isn't needed to replace zipimport.
> Hey, I was there! This is what I recall as well.
>> I vaguely remember people suggesting writing the minimal zip reading
>> code in C but I can't remember why since we have I/O access in importlib
>> through _io and thus it's really just the pulling apart of the zip file
>> to get at the files to import and thus should be doable in pure Python.
> I don't think writing it in Python ever came up. I can't think of a
> reason why that wouldn't work. Rose: this seems like a good approach to try.
> Eric.
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