Cutting a Line Shapefile with a Point Shapefile using Shapely

Shapely works with geometric classes.  Sometimes you want those geometries to come from

shapefiles.  That's where PyShp comes in.  In this example on GIS Stack Exchange, we take a line shapefile and a point shapefile with points on or near the line segments, and split those lines at the location of the nearest point.  At a minimum, the point must be inside the envelope of the line segment:

http://gis.stackexchange.com/questions/214344/split-polyline-shapefile-using-python-with-point-shapefile/214432#214432