I tried to run the code
pcp.get_compounds('CC', searchtype='superstructure', listkey_count=3)
but, it didn't work.
This code is exactly the same as one shown in the documentation ("https://pubchempy.readthedocs.io/en/latest/guide/searching.html#advanced-search-types").
Another code such as pcp.get_compounds('Aspirin', 'name', record_type='3d') which is shown in the same page worked.
Please give me some advice about how to fix this error.
It appears that the example in the PubChemPy advanced search documentation is missing a parameter. The example does not identify how to search, i.e., by SMILES. Substituting the following statement for the one in the example should give you the desired result.
pcp.get_compounds('CC', 'smiles', searchtype='superstructure', listkey_count=3)