better version impl

VERSION

+0.1.0

setup.py

 from os import path as osp
 from setuptools import setup, find_packages
 
+filename = osp.join(osp.dirname(osp.abspath('__file__')), 'VERSION')
+with open(filename, 'r') as f:
+    version = f.read().strip()
+
 import build  # noqa
 
 install_requires = ['cffi']
@@ -10,7 +14,7 @@ docs_require = ['Sphinx', 'sphinx_rtd_theme']
 
 setup(
     name='torch_scatter',
-    version='0.1.0',
+    version=version,
     description='PyTorch extension for various scatter methods',
     url='https://github.com/rusty1s/pytorch_scatter',
     author='Matthias Fey',

torch_scatter/__init__.py

+from os import path as osp
+
 from .functions.add import scatter_add_, scatter_add
 from .functions.sub import scatter_sub_, scatter_sub
 from .functions.mul import scatter_mul_, scatter_mul
@@ -6,7 +8,9 @@ from .functions.mean import scatter_mean_, scatter_mean
 from .functions.max import scatter_max_, scatter_max
 from .functions.min import scatter_min_, scatter_min
 
-from .version import __version__
+filename = osp.join(osp.dirname(osp.abspath('__file__')), 'VERSION')
+with open(filename, 'r') as f:
+    __version__ = f.read().strip()
 
 __all__ = [
     'scatter_add_', 'scatter_add', 'scatter_sub_', 'scatter_sub',

torch_scatter/version.py

-__version__ = '0.1.0'