More scientific representation of bonds/atoms

[Dannnno]

Right now I am just using dictionaries to store bonds and atoms in a compound. It is working alright so far, but I'd like to have methods as well. I want to adjust to a system like

self.atoms = {'a1': Element('H'), 'a2': Element('O'), 'a3': Element('H')}
self.bonds = {'b1': Bond('a1', 'a2', order=1), 'b2': Bond('a2, 'a3', order=1)}
self.node = {'a1': 'H', 'a2': 'O', 'a3': 'H'}
self.edge = {'a1': {'a2': {key='b1'}}, 'a2': {'a1': {key='b1'}, 'a3': {key='b2'}}, 'a3': {'a2': {key='b2'}}}

where Element and Bond are objects that have all the necessary data and methods.

I'd also like to avoid creating copies of all the periodic table information in each Element instance. I propose using __getattr__ here or using properties that fetch from some global variable

[Dannnno]

Fixed a while back.