Setup.py woes: WARNING: '' not a valid package name

Question

For my Python project, I keep my source code in the directory src. Thus, for my project's setup.py script:

from setuptools import setup setup(name='pyIAST', ... package_dir={'':'src'}, packages=[''])

so that it looks for src/IAST.py, where my code resides. e.g. there is a function plot_isotherms() in my IAST.py script so the user can, after installation, call it:

import IAST IAST.plot_isotherms()

Everything works great, but there is an annoying warning when I python setup.py install or use pip install pyIAST from PyPi:

WARNING: '' not a valid package name; please use only.-separated package names in setup.py

How do I make this go away?

My project is here. I'm also a bit confused as to why I name my package pyIAST, yet the user still types import IAST for my package to import.

@IgnacioVazquez-Abrams setuptools.setup comes from distutils.core.setup. distutils docs show that '' is a valid package. I guess the setuptools extention breaks this though. docs.python.org/2/distutils/… — thorr18
– thorr18, Commented Jan 24, 2016 at 13:20

thorr18 · Accepted Answer · 2016-01-26 12:00:36Z

One way to clear that warning is to change your first line to:
from setuptools import setup, find_packages
and then change your packages line to:
packages=find_packages(),
The setup install will no longer generate a warning.

You can run the following two commands to see your isotherm method is now available:
import pyiast #(<==notice this is not IAST)
dir(pyiast)

['BETIsotherm', 'InterpolatorIsotherm', 'LangmuirIsotherm', 'ModelIsotherm', 'QuadraticIsotherm', 'SipsIsotherm', '_MODELS', '_MODEL_PARAMS', '_VERSION', '__author__', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'iast', 'np', 'plot_isotherm', 'print_selectivity', 'reverse_iast', 'scipy']

It can be called using pyiast.plot_isotherm()

You may need to update your setuptools. You can check what version you have with:
import setuptools; print "setup version: ", setuptools.__version__
Can update it with: sudo pip install --upgrade setuptools

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