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Strange behavior with ternary operator #493
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Activity
I wouldn't be surprised if this behaviour is the result of expression templates at work.
Try using a temporary variable to prevent lazy evaluation of the expression on the right-hand side.
Also, to confirm: what is the result of calling the function you got ? That is, what is the output of
py::exec("print(type(mol()))", globals);?Thanks for answer.
I can fix this by using simple if-else or castingdictandlisttopy::objectexplicitly.
But I wonder if this is expected behavior or bug
py::exec("print(type(mol()))", globals); ?
Probably
<class 'list'>because I saw in debugger that&object::ptrwould be written toglobals["mol"].
Although I can't test right now
PS:
py::exec("print(type(mol()))", globals); ?
output:
PythonException: Type: ArgumentError Value: Python argument types in None.None() did not match C++ signature: None(class boost::python::api::object {lvalue}) Traceback: <string> : 1globals["mol"] = condition ? dict : list;Here
dictandlistmust have the same type.Try the folowing code
globals["foo"] = true ? false : 123; // false is converted to (int)0 globals["bar"] = false; boost::python::exec("print(foo, bar)", globals);
which prints
0 FalseReacted by Dan
I noticed strange behavior while trying to use ternary operator with
boost::python::dictandlist.I'm trying to do something like this
What I expected:
<class 'list'>or<class 'dict'>What I got:
<class 'Boost.Python.function'>Is it expected behavior? Then can someone explain me why?
Or this is a bug?