Error with flopy3_triangle example

[porterma]

Hey there,
I installed a virtual anaconda environment using python 3.9 and then installed the latest release candidate of flopy. From there I ran the flopy3_triangle.ipynb and got the following error in line 75 of geospatial_utils.py:

if isinstance(obj, self.__shapefile.Shape):
AttributeError: 'NoneType' object has no attribute 'Shape'

I stepped into tri.add_polygon(circle_poly) in my script, then stepped into geom = GeoSpatialUtil(polygon, shapetype="Polygon") (line 86 of triangle.py), which took me to geospatial_utils.py. It here that I noticed on line 60 the following:

self.__shapefile = import_optional_dependency( "shapefile", errors="silent" )

I ran that line of code without errors="silent" and received this error:

ImportError: Missing optional dependency 'pyshp'. Use pip or conda to install pyshp

Once I installed pyshp everything works out fine and I get to my voronoi mesh from the triangle mesh.

So I am wondering if I missed this dependency in the documentation? Either way, I thought I would bring it to your attention.

Thanks for providing such a great product.

[jlarsen-usgs]

@porterma

It looks like this is a bug in the GeospatialUtils module, where we are not checking if the package has been successfully imported. I'll put together a fix for this.