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Test driven exercise
Code testing, patterns, profiles and optimisation. example from a Well House Consultants training course
More on Code testing, patterns, profiles and optimisation. [link] Source code: annie.py Module: Y212
""" Example .. Exercise ... here is some data about tables Put this in a data file: Rect 1900 1900 Oak Rect 1800 2400 Pine Circ 2000 Maple Rect 1500 2400 Birch Write a factory and series of classes so this works: rest = [] for lyne in open("cheznous.txt"): rest.append(table.factory(lyne)) seats = 0 materials = [] for tab in rest: seats += tab.getseats() materials.append(tab.getmaterial()) print "We can seat",seats,"at tables of", " ".join(materials) """ class animal(object): def __init__(current,breed,age,factor): current.age = age current.hisfactor = factor def getEffectiveAge(this): ea = this.age * this.hisfactor return ea def __str__(this): itsa = this.__class__.__name__ called = this.getName() return "A %s animal called %s" % (itsa,called) def getOlder(this,that): a1 = this.getEffectiveAge() a2 = that.getEffectiveAge() if a2 > a1: return that return this # "P\tdog\tGypsy\t5\t7\tBlack and White\n" @staticmethod def factory(rawline): fields = rawline.strip().split("\t") ob = None if fields[0] == "P": ob = pet(fields[2],fields[1], float(fields[3]),float(fields[4]), fields[5]) elif fields[0] == "F": ob = farm(fields[1], float(fields[2]),float(fields[3]), fields[4]) else: pass # error handler? return ob @staticmethod def getOldest(collect): sofar = collect[0] for posn in range(1,len(collect)): sofar = sofar.getOlder(collect[posn]) return sofar # getOldest = staticmethod(getOldest) class pet(animal): def __init__(current,name,breed,age,factor,colour): super(pet,current).__init__(breed,age,factor) current.name = name def getName(this): return this.name class farm(animal): def __init__(current,breed,age,factor,subbreed): super(farm,current).__init__(breed,age,factor) def getName(this): return "We DON'T give farm animals names" if __name__ == "__main__": billy = pet("William","dog",3,7,"Black and White") tufty = pet("Tufty","G.Pig",2,14,"Brown and White") ermintrude = farm("Cow",3,10,"Fresian") fromFile = "P\tdog\tGypsy\t5\t7\tBlack and White\n" another = animal.factory(fromFile) mybeasts = (billy, tufty, ermintrude, another) for beast in mybeasts: a1 = beast.getEffectiveAge() print a1, beast older = billy.getOlder(tufty) print "older is",older oldest = animal.getOldest(mybeasts) print "oldest is",oldest Learn about this subject
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