我有一个df:importpandasaspdimportnumpyasnpimportdatetimeasDTimporthmacfromgeopy.geocodersimportNominatimfromgeopy.distanceimportvincentydfcity_namestate_namecounty_name0WASHINGTONDCDISTOFCOLUMBIA1WASHINGTONDCDISTOFCOLUMBIA2WASHINGTONDCDISTOFCOLUMBIA3WASHINGTONDCDISTOFCOLUMBIA4WASHINGTONDCDISTOFCOLUM
