Make Python import .pyc when run in optimized mode

Question

I have to use some legacy .pyc modules (with no source) but I'm also forced to use python in optimized mode (python -O): so, when trying to import those modules, I get an import error (as python looks for .py or .pyo files).

Is there a way to make it use pyc modules as well? Or to convert .pyc into .pyo?

Does whoever forces you to use -O realize that the "optimizations" are pretty much stripping assertions and do nothing else? — user395760
– user395760, Commented Feb 11, 2011 at 16:09
I'm running Python under IIS through PyISAPIe and it runs in optimized mode (I've done no investigation on this) — Don
– Don, Commented Jun 4, 2015 at 7:23

Sven Marnach · Accepted Answer · 2011-02-11 15:52:14Z

3

One way to "convert" them is simply renaming them. Of course they won't be optimised, but at least you can use them.

answered Feb 11, 2011 at 15:52

Sven Marnach

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2 Comments

user395760 Over a year ago

Specifically, assertions won't be stripped. But that won't make much of a difference... or at least it shouldn't. There's a surprising amount programmers that use assert for input validation.

Don Over a year ago

It worked, thanks. This make me wonder why couldn't python import them by itself

Artur Gaspar · Accepted Answer · 2011-02-11 17:18:07Z

2

You can use DePython to convert your .pyc files into .py files, and then you will be able to import them.

answered Feb 11, 2011 at 17:18

Artur Gaspar

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