From how would one get the end points of a polyline?
It is easier with Fiona, more "Pythonic", and list slicing:
import fiona
with fiona.drivers():
for line in fiona.open("some_shapefile.shp"):
# print first and last point of every line
print line['geometry']['coordinates'][0], line['geometry']['coordinates'][-1]
And with shapely:
from shapely.geometry import Point
for line in fiona.open("some_shapefile.shp"):
print Point(line['geometry']['coordinates'][0]), Point(line['geometry']['coordinates'][-1])
And you can construct you polygon and save it with Fiona
New: using the suggestion of sgillies (boundary) with the shape function of shapely
from shapely.geometry import shape
for line in fiona.open("some_shapefile.shp"):
print shape(line['geometry']).boundary[0], shape(line['geometry']).boundary[1]