update

setup.py

@@ -728,11 +728,8 @@ def _populate_hdf5_info(dirstosearch, inc_dirs, libs, lib_dirs):
                    "Topic :: Software Development :: Libraries :: Python Modules",
                    "Topic :: System :: Archiving :: Compression",
                    "Operating System :: OS Independent"],
-      #packages=['netCDF4'],
       packages=find_namespace_packages(where="src"),
       package_dir={'':'src'},
-      #data_files=[('netCDF4',data_files)], # doesn't work with pip install
-      #include_package_data = True,
       package_data={"netCDF4.plugins": ["lib__nc*"]},
       ext_modules=ext_modules,
       **setuptools_extra_kwargs)

src/netCDF4/__init__.py

@@ -14,7 +14,8 @@
 __all__ =\
 ['Dataset','Variable','Dimension','Group','MFDataset','MFTime','CompoundType','VLType','date2num','num2date','date2index','stringtochar','chartostring','stringtoarr','getlibversion','EnumType','get_chunk_cache','set_chunk_cache']
 # if HDF5_PLUGIN_PATH not set, point to package path if plugins live there
+pluginpath = os.path.join(__path__[0],'plugins')
 if 'HDF5_PLUGIN_PATH' not in os.environ and\
-    (os.path.exists(os.path.join(os.path.join(__path__[0],'plugins'),'lib__nczhdf5filters.so')) or\
-    os.path.exists(os.path.join(os.path.join(__path__[0],'plugins'),'lib__nczhdf5filters.dylib'))):
-    os.environ['HDF5_PLUGIN_PATH']=os.path.join(__path__[0],'plugins')
+    (os.path.exists(os.path.join(pluginpath,'lib__nczhdf5filters.so')) or\
+     os.path.exists(os.path.join(pluginpath,'lib__nczhdf5filters.dylib'))):
+    os.environ['HDF5_PLUGIN_PATH']=pluginpath