Problem
a) What is meant by a dictionary in Python? And why are they useful?
b) Create a Python program that asks a user for a gene ID or accession number and returns the sequence that corresponds to that gene. Use a dictionary to accomplish this. Get the genes and their sequences from NCBI (or just create some dummy sequences) and create the dictionary so that the key = gene ID and value = sequence. To make this simpler and easier to view, keep the sequences short. Handle the case where the gene ID is not found in the dictionary. Snap shot your command and output.