Fixed a v3 compatibility bug where the attributes were not retrieved …

…from the proper place in the HDF5-file.

Modified the generate_test_hickle.py file to now create hickled files that caused this issue before.

hickle/__version__.py

@@ -10,4 +10,4 @@
 
 # %% VERSIONS
 # Default/Latest/Current version
-__version__ = '4.0.2'
+__version__ = '4.0.3'

hickle/hickle.py

@@ -508,23 +508,23 @@ def load(file_obj, path='/', safe=True):
     # Try to read the provided file_obj as a hickle file
     try:
         h5f, path, close_flag = file_opener(file_obj, path, 'r')
-        h_root_group = h5f.get(path)
+        h_root_group = h5f.get(path)   # Solely used by v4
 
         # Define attributes h_root_group must have
         v3_attrs = ['CLASS', 'VERSION', 'PYTHON_VERSION']
         v4_attrs = ['HICKLE_VERSION', 'HICKLE_PYTHON_VERSION']
 
         # Check if the proper attributes for v3 loading are available
-        if all(map(h_root_group.attrs.get, v3_attrs)):
+        if all(map(h5f.attrs.get, v3_attrs)):
             # Check if group attribute 'CLASS' has value 'hickle
-            if(h_root_group.attrs['CLASS'] != b'hickle'):  # pragma: no cover
+            if(h5f.attrs['CLASS'] != b'hickle'):  # pragma: no cover
                 # If not, raise error
                 raise AttributeError("HDF5-file attribute 'CLASS' does not "
                                      "have value 'hickle'!")
 
             # Obtain version with which the file was made
             try:
-                major_version = int(h_root_group.attrs['VERSION'][0])
+                major_version = int(h5f.attrs['VERSION'][0])
 
             # If this cannot be done, then this is not a v3 file
             except Exception:  # pragma: no cover

hickle/tests/legacy_hkls/generate_test_hickle.py

@@ -23,5 +23,5 @@
 }
 
 print("Dumping %s..." % fn_out)
-hkl.dump(dd, fn_out)
+hkl.dump(dd, fn_out, path='test')
 

hickle/tests/test_legacy_load.py

@@ -22,7 +22,7 @@ def test_legacy_load():
     for filename in filelist:
         try:
             print(filename)
-            a = hkl.load(filename)
+            a = hkl.load(filename, path='test')
         except Exception:
             with h5py.File(filename) as a:
                 print(a.attrs.items())