Getting "TypeError: Unhashable type: 'Point'" while trying to use GeoPandas - typeerror

Question

I am currently trying to plot a series of location points on top of an existing map (.shp file). But I run into a "TypeError: Unhashable type: 'Point'" error while trying to plot them. Here is this code:
fig,ax = plt.subplots(figsize=(15,15))
street_map.plot(ax = ax, alpha = 0.4, color = "grey")
geo_df[geo_df['geometry']].plot(ax = ax, markersize = 20, color = "blue", marker = "o", label="location")
plt.legend(prop={'size': 15})
And this is the error message that shows up. Is this because I am indexing it incorrectly? I'm just trying to overlay a a df with a list of coordinates over an existing shp file of the street layout of San Mateo County:
---------------------------------------------------------------
------------
TypeError Traceback (most
recent call last)
<ipython-input-46-e41b19a6a359> in <module>
1 fig,ax = plt.subplots(figsize=(15,15))
2 street_map.plot(ax = ax, alpha = 0.4, color = "grey")
----> 3 geometries = geo_df[geo_df['geometry']].apply(lambda x:
x.wkt).values
4 plt.legend(prop={'size': 15})
~/anaconda3/lib/python3.7/site-packages/geopandas/geodataframe.py in __getitem__(self, key)
1325 GeoDataFrame.
1326 """
->1327 result = super().__getitem__(key)
1328 geo_col = self._geometry_column_name
1329 if isinstance(result, Series) and
isinstance(result.dtype, GeometryDtype):
~/anaconda3/lib/python3.7/site-packages/pandas/core/frame.py in
__getitem__(self, key)
2804 if is_iterator(key):
2805 key = list(key)
-> 2806 indexer =
self.loc._get_listlike_indexer(key, axis=1, raise_missing=True)
[1]
2807
2808 # take() does not accept boolean indexers
~/anaconda3/lib/python3.7/site-packages/pandas/core/indexing.py
in _get_listlike_indexer(self, key, axis, raise_missing)
1545 if len(ax) or not len(key):
1546 key = self._convert_for_reindex(key, axis)
-> 1547 indexer = ax.get_indexer_for(key)
1548 keyarr = ax.reindex(keyarr)[0]
1549 else:
~/anaconda3/lib/python3.7/site-
packages/pandas/core/indexes/base.py in get_indexer_for(self,
target, **kwargs)
4499 """
4500 if self.is_unique:
-> 4501 return self.get_indexer(target, **kwargs)
4502 indexer, _ = self.get_indexer_non_unique(target,
**kwargs)
4503 return indexer
~/anaconda3/lib/python3.7/site-
packages/pandas/core/indexes/base.py in get_indexer(self,
target, method, limit, tolerance)
2751 )
2752
-> 2753 indexer =
self._engine.get_indexer(target._ndarray_values)
2754
2755 return ensure_platform_int(indexer)
pandas/_libs/index.pyx in
pandas._libs.index.IndexEngine.get_indexer()
pandas/_libs/hashtable_class_helper.pxi in
pandas._libs.hashtable.PyObjectHashTable.lookup()
TypeError: unhashable type: 'Point'

Answer 1

When you write geo_df[geo_df['geometry']], you are using geo_df['geometry'] as a mask. That is where the error comes from. Since you haven't posted a reproducible example, my guess is that your wanted to use a single column (while there's no reason to do so in practice). Try following:
fig,ax = plt.subplots(figsize=(15,15))
street_map.plot(ax = ax, alpha = 0.4, color = "grey")
geo_df['geometry'].plot(ax = ax, markersize = 20, color = "blue", marker = "o", label="location")