figure comparing the in operator for python lists and dictionaries time for the contains operator on dictionary is constant even as the dictionary size grows in fact for dictionary size of the contains operation took milliseconds and for the dictionary size of it also took milliseconds since python is an evolving languagethere are always changes going on behind the scenes the latest information on the performance of python data structures can be found on the python website as of this writing the python wiki has nice time complexity page that can be found at the time complexity wiki self check - which of the above list operations is not ( ) list pop( list pop( list append( list[ all of the above are ( - which of the above dictionary operations is ( ) algorithm analysis