A Generic Point

We want a very generic point class that will provide everything needed to be used as part of a metric space. It must implement the following methods:

• dist(self, other) This is distance function, i.e. the metric.

• fromstring We will use this to parse data files from the command line.

• __eq__ We need to know if two points are the same point.

• __hash__ We will often want to store sets of points and thus Points must be hashable.

• __str__ It is often useful to print the points.

These will be our basic requirements for a Point class. If you want to define your own metric to use with this package, it need only implement these methods in order to work.