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From: Mike Boyle <moboyle79@outlook.com>
To: "python-list@python.org" <python-list@python.org>
Subject: Simple import in python 3 errors with complaint about bytes
Date: Mon, 20 Oct 2014 23:29:39 +0000
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Xref: csiph.com comp.lang.python:79352

I'm modifying an extension written with the c-api to have a datatype of qua=
ternions <https://github.com/moble/numpy_quaternion>=2C with one of the goa=
ls being python 3 support. =A0It works nicely in python 2.7=2C but for pyth=
on 3.x gives an error that I can't find anywhere on the google. =A0The dire=
ctory looks like this:=0A=
=0A=
.../site-packages/=0A=
=A0 =A0 quaternion/=0A=
=A0 =A0 =A0 =A0 __init__.py=0A=
=A0 =A0 =A0 =A0 numpy_quaternion.so=0A=
=0A=
__init__.py contains a line like this:=0A=
=0A=
=A0 =A0 from .numpy_quaternion import quaternion=0A=
=0A=
But when it hits that line=2C python 3 throws its hands up in disgust:=0A=
=0A=
> python -c 'import quaternion'=0A=
Traceback (most recent call last):=0A=
=A0 File "<string>"=2C line 1=2C in <module>=0A=
=A0 File "/Users/mynamehere/.continuum/anaconda/envs/py3k/lib/python3.4/sit=
e-packages/quaternion/__init__.py"=2C line 3=2C in <module>=0A=
=A0 =A0 from .numpy_quaternion import quaternion=0A=
TypeError: __import__() argument 1 must be str=2C not bytes=0A=
=0A=
The only thing before that line is `import numpy as np`=2C which typically =
works just fine. =A0Obviously=2C I'm using python3.4 to compile and (attemp=
t to) import (with a conda environment)=2C so it's not something as dumb as=
 using the wrong python. =A0Also=2C this is the result for both me on my la=
ptop and Travis-CI <https://travis-ci.org/moble/numpy_quaternion>=2C so it =
doesn't seem to be anything peculiar to my installation. =A0I've posted thi=
s question on stackoverflow=2C but haven't gotten much interest=3B the only=
 responder suggested I ask here instead.=0A=
=0A=
Any ideas what's going wrong=2C or where I can go from here?=0A=
=0A=
Thanks=2C=0A=
Mike 		 	   		  =