Infinity as Edges for Binning

[jeff-hernandez]

This closes #114 by supporting infinite edges when binning labels.

Example

Create a label times object.

>>> data = [226.93, 47.95, 283.46, 31.54]
>>> lt = LabelTimes({'target': data})
>>> lt

    target
0  226.93
1   47.95
2  283.46
3   31.54

Bin values using infinite edges.

>>> lt.bin(['-inf', 100, 'inf'])

            target
0   (100.0, inf]
1  (-inf, 100.0]
2   (100.0, inf]
3  (-inf, 100.0]

[thehomebrewnerd]

In general this looks good. Might be good to add a test in the unit tests to cover passing "inf" and "-inf" strings as bin edges along with a test to confirm that the precision parameter works as expected.

[jeff-hernandez]

Thanks @thehomebrewnerd. The docstring examples are configured as doctests which are included as unit tests in pytest.

[rwedge]

Looks good!