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Exercise 1 Solutions

The aim of this exercise is to familiarise you with the use of objects within Python.

# Extending Mantid With Python: Exercise 1
#
# Write a Detector class contains two attributes id and name:
#   - The attributes should be able to be set by a call like: Detector(1, "bank1_1").
# Write an an Instrument class with 2 attributes: name and list of detectors
#   - These attributes should also be able to be set by a call like: Instrument('MyInst', dets)
# Add a method to the Instrument class called printTree that will print the names & ids of the detectors contained within it
#
# Write a class called Component that stores a single name attribute
# Reorganise the Instrument & Detector classes to use Component as a super class and share its name attribute
# Check the printTree method still functions correctly.


class Component(object):
   name = None

   def __init__(self, name):
        self.name = name

class Detector(Component):
    id = None

    def __init__(self, id, name):
        super(Detector, self).__init__(name)
        self.id = id


class Instrument(Component):
    detectors = None

    def __init__(self, name, detectors):
        super(Instrument, self).__init__(name)
        self.detectors = detectors


    def printTree(self):
        print("Instrument: " + self.name)
        for detector in self.detectors:
            print("Name: {0} ID: {1}".format(detector.name, detector.id))

##########
det1 = Detector(1,"Bank1")
det2 = Detector(2,"Bank2")
inst =  Instrument("My Instrument", [det1,det2])

inst.printTree()