[issue20479] Efficiently support weight/frequency mappings in the statistics module

Wolfgang Maier added the comment: Well, I was thinking about frequencies (ints) when suggesting for x,m in data.items(): T = _coerce_types(T, type(x)) n, d = exact_ratio(x) partials[d] = partials_get(d, 0) + n*m in my previous message. To support weights (float

[issue20481] Clarify type coercion rules in statistics module

Wolfgang Maier added the comment: there are currently two strict requirements for any numeric type to be usable with statistics._sum: I meant *three* of course (remembered one only during writing). -- ___ Python tracker rep...@bugs.python.org

[issue20481] Clarify type coercion rules in statistics module

Wolfgang Maier added the comment: Just to make sure that this discussion is not getting on the wrong track, there are currently two strict requirements for any numeric type to be usable with statistics._sum: (1) the type has to provide either - numerator/denominator properties

[issue20481] Clarify type coercion rules in statistics module

Wolfgang Maier added the comment: Once the input numbers are converted to float statistics._sum can handle them perfectly well. In this case I think the output should also be a float so that it's clear that precision may have been lost. If the precision of float is not what the user wants

[issue20481] Clarify type coercion rules in statistics module

Wolfgang Maier added the comment: Hi Oscar, well, I haven't used sympy much, and I have no experience with the others, but in light of your comment I quickly checked sympy and gmpy2. You are right about them still not using the numbers ABCs, however, on your advise I also checked how

[issue20479] Efficiently support weight/frequency mappings in the statistics module

Wolfgang Maier added the comment: -Ursprüngliche Nachricht- Von: Steven D'Aprano [mailto:rep...@bugs.python.org] Gesendet: Sonntag, 2. Februar 2014 12:55 An: wolfgang.ma...@biologie.uni-freiburg.de Betreff: [issue20479] Efficiently support weight/frequency mappings

[issue20481] Clarify type coercion rules in statistics module

Wolfgang Maier added the comment: Thanks Nick for filing this! I've been working on modifications to statistics._sum and statistics._coerce_types that together make the module's behaviour independent of the order of input types (by making the decision based on the set of input types

[issue18920] argparse module version action

New submission from Wolfgang Maier: Hi, I just noticed that version output generated via the **'version' action** of the **argparse** module is routed to stderr. I'd expect regular output to go to stdout instead. The current behavior also seems inconsistent to me because --help prints to stdout

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