doctest - a clean example
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: dt.py Module: Y212
"""Return the factorial of n, an exact integer >= 0.
>>> [factorial(n) for n in range(6)]
[1, 1, 2, 6, 24, 120]
if not n >= 0:
raise ValueError("n must be >= 0")
if math.floor(n) != n:
raise ValueError("n must be exact integer")
if n+1 == n: # catch a value like 1e300
raise OverflowError("n too large")
result = 1
factor = 2
while factor <= n:
result *= factor
factor += 1
if __name__ == "__main__":
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* Learning to program in Python
* Python Programming
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