In[]:=
cityDistance=APIFunction[{"city1"->"City","city2"->"City"},QuantityMagnitude@TravelDistance[#city1,#city2]&]
Out[]=
APIFunction[{city1City,city2City},QuantityMagnitude[TravelDistance[#city1,#city2]]&]
In[]:=
co=CloudDeploy[cityDistance,Permissions->"Public"]
Out[]=
In[]:=
EmbedCode[co,"Python"]
Out[]=