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boost.python/extract

extractor interface which can be used to extract C++ types from Python objects.

We have discussed two main use cases for extractions

1. In user code which needs to retrieve C++ objects from their corresponding Python objects:

Getting value:

    void f(object x)
    {
        int y = extract<int>(x); // retrieve an int from x
    }

Users may also want to explicitly check for convertibility:

    int g(object x)
    {
        extractor<int> get_int(x);
        if (get_int)
            return get_int();
        else
            return 0;
    }

2. In the implementation of sequence from_python converters (e.g. Python tuple/list -> std::vector)

EditText (last edited 2002-09-25 19:57:58 by MikeRovner)

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