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Encountering an "unhashable type" error Momepy.preprocess function #482
Description
Describe the problem
momepy.preprocess returns TypeError: unhashable type: 'list'.
Both Momepy and GeoPandas are the most recent versions (see below). I also checked to make sure that I am passing a GeoDataFrame which returns <class 'geopandas.geodataframe.GeoDataFrame'>.
Steps to reproduce
import momepy
import geopandas as gpd
import osmnx as ox
#Get building geometries from OSM
BN = ox.geometries_from_bbox(40.550055, 40.436808, -88.917847, -89.032860,
tags={'building':True})
#The data cannot be in a geographic coordinate system for momepy to run correctly
BN_projected = ox.projection.project_gdf(BN)
#Explode muti-part geometries into multiple single geometries.
BN_exploded = BN_projected.explode()
#Strip out polygons from exploded gdf
BN_exploded_poly = BN_exploded.loc[BN_exploded.geometry.type=='Polygon',:]
#Check to make sure all non-polygon geometries have been removed
BN_exploded_poly.geometry
#Reset index - this is a necessary step due to a bug in geopandas
BN_exploded_poly = BN_exploded_poly.reset_index()
print(type(BN_exploded_poly))
#Run building data preprocessing
BN_buildings = momepy.preprocess(BN_exploded_poly, size=30, compactness=0.2, islands=True)Versions of your packages
momepy='0.5.4'
geopandas='0.12.2'
osmnx='1.2.2'
Your operating system
Windows 10 Enterprise, 64-bit
Additional context
I am returning to this code. It worked seamlessly 14 months ago and I have been unable to riddle out the errors I now encounter. Likely this is something wrong on my end, but over the past few days I've done all I can to solve the problem before reaching out here.
Activity
martinfleis commentedon Jun 5, 2023
We should deprecate
momepy.preprocessand extract its parts into individual functions...The error comes from code that is sub-optimal and shall be refactored on our side.
Anyway, I am not able to reproduce it, so no idea what is going on.