Access sub category in JSON python [closed]

Question

What is the code required to print the ContractName sub category (under result) ?

I know to get result I have my dictionary result :

response_dict = response.json()
print()response_dict["result"]

But how do I get ContractName??

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "SourceCode":"test",
         "ContractName":"DAO",
         "CompilerVersion":"v0.3.1-2016-04-12-3ad5e82",
      }
   ]
}