Relation

A python class implementing a discrete, mathematical relationship. Supports all cardinalities:

• 1:1
• 1:M (and its inverse M:1)
• M:M (or M:N if you insist)

Useful for all manners of invertible container goodness, including:

• aliasing (1:1)
• tagging (M:M)
• partitioning (1:M)
• assignment (M:1)