[ I've taken this discussion back to the tutor list. - Cameron ]
On 01Jun2015 18:14, Sydney Shall <s.sh...@virginmedia.com> wrote:
On 31/05/2015 03:00, Cameron Simpson wrote:
You say that your results are "all rather close, consistent with the sigma
value I have chosen for the spread of my population". I would advocate
making some "contraint" tests that verify this property for _any_ input
data set.
Then you can run with random and _changing_ input data sets to verify
that your code produces the expected _kind_ of results with many data sets.
[...]
range class which stores contiguous ranges efficiently (a sequence of
(low,high) pairs). It has a few add/remove operations which are meant to
maintain that sequence on ordered minimal form. cutting and merging
adjacent ranges is very easy to get wrong, very sensitive to off-by-one
logic errors.
So my tests for this class include some random tests which do random
unpredictable add/remove operations, and run a consistency check on the
object after each operation. This gives me good odds of exercising some
tricky sequence which I have not considered explicitly myself.
You can see the test suite here:
https://bitbucket.org/cameron_simpson/css/src/tip/lib/python/cs/range_tests.py
I have studied the material you indicated and it has been most
helpful. I think that I have understood the principle involved, but I
have had some problem implementing it.
The range tests are mostly clear to me but there is one aspect I
cannot follow.
You use in this suite imports from Range, including Range, overlap,
spans and Span.
Are these programs that you have written? If so, are they specific to
your set up or are they generic? If so, is it possible to obtain these
programs?
The "cs.range" is a module of my own. As you might imagine, cs.range_tests has
the entire purpose of testing cs.range. cs.range is here:
https://bitbucket.org/cameron_simpson/css/src/tip/lib/python/cs/range.py
Feel free. Since it in turn has some dependencies the easiest way to get it is
to use "pip" to install it, as pip will also fetch and insteall its
dependencies. But if you just want something to read, fetch and enjoy.
I have established a very primitive test suite based on your cs.range >notions
and it works fine, but it would be better, I am sure, to do it >properly.
There are many other people whose test writing ability surpasses mine. But
you're welcome to learn anything you can from mine, and to ask questions.
Finally, I have one comment for the respected Moderator, if he is not
out on a walk in the highlands in this cold and wet weather.
I have taken the liberty of raising my problem here rather than
elsewhere, because I have observed that the biological and bio-medical
community, who always come late to new notions, is now rapidly
discovering python. A great deal of work in these fields involve
either stochastic simulations or statistical problems of analysis. The
latter are more or less straight-forward, but the simulations are not.
You might ask a separate question on the python-l...@python.org about
simulations. It has a wider audience than the tutor list and may well include
people doing simulation work, or who know where to look.
Thanks for all the help. You people are a model of how we could
perhaps civilize humanity.
Nah. We might all be striving to be a model of how humanity might be when
civilised though...
Cheers,
Cameron Simpson <c...@zip.com.au>
You my man are a danger to society and should be taken out of society for all
our sakes. As to what is done to you once removed I couldn't care less.
- Roy G. Culley, Unix Systems Administrator
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