35 In order to solve this problem, we need the following machinery:

    35 In order to solve this problem, we need the following machinery:

    36 File Reading - which we have already looked at.

    36 File Reading - which we have already looked at.

    37 parsing  - which we have looked at partially.

    37 parsing  - which we have looked at partially.

    38 Dictionaries - we shall be introducing the concept of dictionaries here.

    38 Dictionaries - we shall be introducing the concept of dictionaries here.

    39 And finally plotting - which we have been doing all along.

    39 And finally plotting - which we have been doing all along.

    40 

    44 

    41 Let's first start off with dictionaries.

    45 Let's first start off with dictionaries.

    42 

    46 

    43 We earlier used lists briefly. Back then we just created lists and appended items into them. 

    47 We earlier used lists briefly. Back then we just created lists and appended items into them. 

    44 x = [1, 4, 2, 7, 6]

    48 x = [1, 4, 2, 7, 6]