[issue4869] random.expovariate(0.0)

[Keith Briggs]

Keith Briggs <kbriggs at users.sourceforge.net> added the comment:

That's all true - the only thing in favour of my suggestion is that to
allow lambda=0 is sometimes useful in simulations, meaning that it's
infinite time to the next event, i.e. it never occurs.  A FP infinity
would do this without requiring a special case.

At least the documentation should state the restrictions on lambda.

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