What are the lists,tuples in python and how are they different from arrays of C..?

lists are like arrays in C .

tuples are lists but you cannot modify them ( adding, taking off elements )

but one of the strong features of python's data structures is dictionaries where you can have something like a list and it's elements are keys and values and looks like this :

my_dict ={'key1':value1 , 'key2':value2 ..... } where you can think of the key as a definition and the value is the explanation of that definition , just like a real dictionary. 

or

keys are variables and values are whatever you set them to be for each key.