H3fy concats pandas dataframes for each polygon in source_unary

[jtmiclat]

Hi was looking h3fy implementation and I found the following lines

tobler/tobler/util/util.py

Lines 97 to 102 in 66f3825

	output = []
	for geom in source_unary.geoms:
	hexes = _to_hex(geom, resolution=resolution, return_geoms=return_geoms)
	output.append(hexes)
	hexagons = pandas.concat(output)

It runs pd.concat for each polygon in source_unary. It should probably run pd.concat only once and outside the for loop like

        output = []
        for geom in source_unary.geoms:
            hexes = _to_hex(geom, resolution=resolution, return_geoms=return_geoms)
            output.append(hexes)
        hexagons = pandas.concat(output) # unindent

[knaaptime]

good catch, thanks!