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August 29, 2015 14:08
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Test class
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| class Galaxy(object): | |
| def __init__(self, size, expansionRate): | |
| self.size = size | |
| self.time = 0 | |
| self.expansionRate = expansionRate | |
| def update(self): | |
| self.time += 1 | |
| self.size += self.expansionRate | |
| def currentSize(self): | |
| return self.size | |
| g1 = Galaxy(5, 10) | |
| g2 = Galaxy(2, 3) | |
| for x in xrange(0, 10): | |
| g1.update() | |
| g2.update() | |
| print g1.currentSize() | |
| print g2.currentSize() | |
| class PeriodicGalaxy(Galaxy): | |
| PI = 3.141592654 | |
| def __init__(self, size, expansionRate, offset): | |
| Galaxy.__init__(self, size, expansionRate) | |
| self.offset = offset | |
| def update(self): | |
| self.size = self.offset + sin(self.time * self.expansionRate * 2 * self.PI) | |
| g3 = PeriodicGalaxy(3, 5) |
type(g3) == PeriodicGalaxy
isinstance(g3, PeriodicGalaxy) == True
isinstance(g3, Galaxy) == True
isinstance(g1, PeriodicGalaxy) == False
isinstance(g1, Galaxy) == True
type(PeriodicGalaxy) == type
type(type) == type
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g1 = Galaxy(5, 10)
calls
g1._ _ init _ _(5, 10)
implicitly