check_attribute_name(name)
/Users/bpeng1/anaconda3/envs/vtools/lib/python3.7/site-packages/tables-3.6.0-py3.7-macosx-10.9-x86_64.egg/tables/path.py:155: NaturalNameWarning: object name is not a valid Python identifier: '0'; it does not match the pattern ``^[a-zA-Z_][a-zA-Z0-9_]*$``; you will not be able to use natural naming to access this object; using ``getattr()`` will still work, though
check_attribute_name(name)
/Users/bpeng1/anaconda3/envs/vtools/lib/python3.7/site-packages/tables-3.6.0-py3.7-macosx-10.9-x86_64.egg/tables/path.py:155: NaturalNameWarning: object name is not a valid Python identifier: '1'; it does not match the pattern ``^[a-zA-Z_][a-zA-Z0-9_]*$``; you will not be able to use natural naming to access this object; using ``getattr()`` will still work, though
check_attribute_name(name)
/Users/bpeng1/anaconda3/envs/vtools/lib/python3.7/site-packages/tables-3.6.0-py3.7-macosx-10.9-x86_64.egg/tables/path.py:155: NaturalNameWarning: object name is not a valid Python identifier: '2'; it does not match the pattern ``^[a-zA-Z_][a-zA-Z0-9_]*$``; you will not be able to use natural naming to access this object; using ``getattr()`` will still work, though
check_attribute_name(name)
The following test
with error message and no output,
The actual commands executed are