fix lint issues from #22 (#24)

Author: kandersolar

pvfactors/geometry/pvrow.py

@@ -5,7 +5,7 @@
 from pvfactors.config import COLOR_DIC
 from pvfactors.geometry.base import \
     BaseSide, _coords_from_center_tilt_length, PVSegment
-from shapely.geometry import GeometryCollection, LineString
+from shapely.geometry import LineString
 from pvfactors.geometry.timeseries import \
     TsShadeCollection, TsLineCoords, TsSurface
 from pvlib.tools import cosd, sind
@@ -709,10 +709,6 @@ def length(self):
         """Length of the PV row."""
         return self.front.length + self.back.length
 
-    @property
-    def boundary(self):
-        return self._linestring.boundary
-
     def intersects(self, line):
         """Check if the PV row intersects with a line.
 

pvfactors/viewfactors/vfmethods.py

@@ -240,7 +240,7 @@ def vf_pvrow_to_pvrow(self, ts_pvrows, tilted_to_left, vf_matrix):
                         surf_i.coords, surf_j.coords, length_i)
                     vf_i_to_j = np.where(tilted_to_left, vf_i_to_j, 0.)
                     vf_j_to_i = np.divide(
-                        vf_i_to_j * length_i , length_j,
+                        vf_i_to_j * length_i, length_j,
                         where=length_j > DISTANCE_TOLERANCE,
                         out=np.zeros_like(length_j))
                     vf_matrix[i, j, :] = vf_i_to_j