[Python] Dictionary of polygon sides/edges (including MultiPolygons)

This question is related to here.

How do I create a dict of all the polygons [including MultiPolygons], in a GeoDataFrame, that share a side/edge. The polygons will intersect but never cross.

polys = gpd.GeoSeries([Polygon([(0,0), (2,0), (2, 1.5), (2,2), (0,2)]),
Polygon([(0,2), (2,2), (2,4), (0,4)]),
Polygon([(2,0), (5,0), (5,1.5), (2,1.5)]),
Polygon([(3,3), (5,3), (5,5), (3,5)]),
MultiPolygon([Polygon([(6,1), (8, 1), (8, 3), (6, 3)],
[[(6.5, 1.5), (7.5, 1.5), (7.5, 2.5), (6.5, 2.5)][::-1]]
)])])

fp = gpd.GeoDataFrame({'geometry': polys, 'name': ['a', 'b', 'c', 'd', 'e'],
'grnd': [25, 25, 25, 25, 25],
'rf': [29, 35, 26, 31, 28]})

fig, ax = plt.subplots(figsize=(6, 6))
fp.plot(ax=ax, alpha=0.3, cmap='tab10', edgecolor='k',)
fp.apply(lambda x: ax.annotate(text=x['name'], xy=x.geometry.centroid.coords[0], ha='center'), axis=1)
plt.show()




I've tried this:

# Create series of all the line segments
lines = fp.geometry.apply(lambda x: (list(map(
LineString,
zip(x.boundary.coords[:-1], x.boundary.coords[1:])))
if isinstance(x, MultiPolygon)
else list(chain(*list(list(map(
LineString,
zip(x.boundary.coords[:-1], x.boundary.coords[1:])))
for poly in x.geoms)))
)).explode()

result = {
line : list(fp.loc[
(fp.geometry.touches(line)) # line touches the polygon
& (fp.geometry.intersection(line).length > 0), # And the intersection is more than just a point
'rf'].values)
for line in lines}



which yields: AttributeError: 'Polygon' object has no attribute 'geoms'

Expected result; something like:

{'LINESTRING (0 0, 2 0)': ['a'],
'LINESTRING (2 0, 2 1.5)': ['a', 'c'],
'LINESTRING (2 1.5, 2 2)': ['a'],
'LINESTRING (2 2, 0 2)': ['a', 'b'],
'LINESTRING (0 2, 0 0)': ['a'],
'LINESTRING (0 2, 2 2)': ['a', 'b'],
'LINESTRING (2 2, 2 4)': ['b'],
'LINESTRING (2 4, 0 4)': ['b'],
'LINESTRING (0 4, 0 2)': ['b'],...}

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