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python Programming Glossary: a.bPicklingError: Can't pickle <class 'decimal.Decimal'>: it's not the same object as decimal.Decimal http://stackoverflow.com/questions/1412787/picklingerror-cant-pickle-class-decimal-decimal-its-not-the-same-object pickle it and before you unpickle it. So for example from a.b import c C c pickler.dump C will make a subtly different object..
When and how to use the builtin function property() in python http://stackoverflow.com/questions/1554546/when-and-how-to-use-the-builtin-function-property-in-python does nothing good. Sure it's nice to be able to write a.b 2 instead of a.setB 2 but hiding the fact that a.b 2 isn't a.. write a.b 2 instead of a.setB 2 but hiding the fact that a.b 2 isn't a simple assignment looks like a recipe for trouble.. either because some unexpected result can happen such as a.b 2 actually causes a.b to be 1 . Or an exception is raised. Or..
Finding Signed Angle Between Vectors http://stackoverflow.com/questions/2150050/finding-signed-angle-between-vectors theta from vector a to b And yes I know that theta arccos a.b a b . However this does not contain a sign i.e. it doesn't distinguish..
Can set any property of Python object http://stackoverflow.com/questions/5862159/can-set-any-property-of-python-object of Python object For example this code is Python a object a.b 3 throws AttributeError 'object' object has no attribute 'b'.. 'b' But this piece of code class c object pass a c a.b 3 is just fine. Why can I assign property b when class x does.. class c object __slots__ foo bar baz a c a.foo 3 # works a.b 3 # AttributeError Of course there are some caveats with this..
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