Converting shapely geometries to other objects

geometry.py

"""Convert shapely geometries to other objects

Other interfaces

- matplotlib: PathPatch
- pyqtgraph: PlotItem
- bokeh: Glyph
- scikit-image: Indices on a grid

References
    - https://bitbucket.org/sgillies/descartes/
"""
from shapely.geometry.base import BaseMultipartGeometry
from shapely.geometry.linestring import LineString
from shapely.geometry.point import Point
from shapely.geometry.polygon import Polygon


class Adapter(object):
    def __init__(self, geom):
        self.geom = geom


class PointAdapter(Adapter):
    """Adapt shapely points"""
    pass


class LineStringAdapter(Adapter):
    """Adapt shapely linestrings"""
    pass


class PolygonAdapter(Adapter):
    """Adapt shapely polygons
    
    * interior
    * exterior
    """
    pass


def converter(geom):
    if isinstance(geom, Point):
        yield PointAdapter(geom)
    elif isinstance(geom, LineString):
        yield LineStringAdapter(geom)
    elif isinstance(geom, Polygon):
        yield PolygonAdapter(geom)
    elif isinstance(geom, BaseMultipartGeometry):
        for gen in (converter(geo) for geo in geom):
            yield from gen
    else:
        raise TypeError