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Better implementation: class with the parameters a0, tp, and k
as attributes and a special method __call__ for evaluating a(t) :
class A:
def __init__(self, a0=1, k=2):
self.a0, self.k = a0, k
def __call__(self, t):
return self.a0 if t < self.tp else self.k*self.a0
a = A(a0=2, k=1) # a behaves as a function a(t)
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