Cannot import module from .pyc file

[markfickett]

When I try to import a module that is defined (only) in a .pyc file, I get an import error. For example, when my directory contains:

__init__.py
mark.pyc  # but not mark.py

and init contains

import mark

I get an error saying

ImportError: No module named mark

The use case is that I'm writing competing AIs with some friends, and so we want to let our AIs interact (thus checking them into a shared git repo), but we don't want to be able to see each other's implementations (thus checking in *.pyc not *.py).

The repo in question is https://github.com/markfickett/modernart/tree/include-deps . Note that as checked in it uses importlib to find and import the player (*.pyc) modules in players/init.py, but I edited it to be a direct import for debugging purposes in QPython.

Thanks for making and releasing QPython! It's great to be able to do some Python coding on my phone.

[riverfor]

To save space, QPython set the PYTHONDONTWRITEBYTECODE=1 when it start which will not generate pyc files, is it helpful ?

Thanks.

[markfickett]

Thanks for taking a look at this!

I actually set PYTHONDONTWRITEBYTECODE=1 on my desktop where I was doing development of the code in question. So, I usually don't generate bytecode / *.pyc files, but Python on my computer will still import modules defined only in bytecode files.

For example, this works for me:

$ export PYTHONDONTWRITEBYTECODE=1
$ echo "from_pyc = 'from pyc'" > example.py
$ python -m compileall .
$ rm example.py
$ python
Python 2.7.6 (default, Sep  9 2014, 15:04:36) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin
>>> import example
>>> example.from_pyc
'from pyc'

The use case I'm going for here is importing from (in this example) example.pyc even though example.py is not present. Is there perhaps a filter that's preventing QPython from seeing the bytecode file?

[VijayendraGhadge]

What if I want all the *.pyc files generated when QPython starts and i have no space issue.
Is there a way i can generate the pyc files when installation takes place OR before by code executes.

[riverfor]

The PYTHONDONTWRITEBYTECODE=1 is set in QPython's runtime.

I think the following example may work to generate the pyc files:

import os
os.putenv("PYTHONDONTWRITEBYTECODE=0")

other code to start the real script with execfile

...

If this doesn't work, I could add a option which define PYTHONDONTWRITEBYTECODE
being true of false in setting in the future.

Thanks.

On Fri, May 29, 2015 at 11:17 AM, Vijayendra Ghadge <
notifications@github.com> wrote:

What if I want all the *.pyc files generated when QPython starts and i
have no space issue.
Is there a way i can generate the pyc files when installation takes place
OR before by code executes.

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