Architecture_and_design.rst

Architecture and Design

Exercises

14   Exercise

Create 2 classes

• Sequence
• MutableSequence

These 2 classes have same attributes but Sequence can be mutate and extend whereas Sequence are immutable.

example of code using these classes:

>>> eco = Sequence('toto' , 'GAATTC')
>>> eco.mutate(1, 'T')
>>> eco.sequence
'GTATTC'
>>> eco.mutate(10, 'T')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "mutableSequence.py", line 97, in mutate
    raise ValueError("pos must be >0 and < {}".format(len(self._sequence)))
ValueError: pos must be >0 and < 6

15   Exercise

how can you modeling

• non mutable DNA sequence
• mutable DNA sequence
• non mutable amino acid sequence
• mutable amino acid sequence

can you easily extend your model to support no mutable/ mutable RNA sequence ?

:download:`multi_inheritance.py <_static/code/multi_inheritance.py>`

16   Exercise

work with in small groups (2-3 people). To solve a problem we need to design

• genome
• gene
• sequence

in context in eukaryote and prokaryote. propose an architecture. you hav not to implement methods just do a schema of the components and the relations between the components.

Note

you can add objects not listed above if you need for your architecture.