Python homework

End of day 1 - homework!

Please complete the two exercises below - as we introduced a lot of new concepts it is important that you practice them so we can continue with new ones on the second day.

Exercise sheets

Download these exercise sheets and complete the questions.

Programming exercise

Write a program that does the following:

1. Ask the user for a full DNA sequence
   1. Make sure the sequence contains only GACT
2. Once you have a valid sequence
   1. Keep on asking the user for DNA fragments, stop if they just press return
   2. For each DNA fragment the user enters:
      1. Check if it occurs in the full sequence
      2. Print out the sequence position if so
      3. Track each fragment
3. As a summary, print out all fragments with their position

Tips to complete this exercise in case you get stuck. [click on show more for answer)
Use while loops: you can use the condition to decide when to end the loop depending on the user input Track the sequence fragment and position data using a list Use string methods! To check the full DNA sequence, you can count how many times each GACT letter occurs, add up these counts, and compare this value to the total length of the full DNA sequence

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