'What is _PyObject_GetAttrId() in CPython?
I looked at sysmodule.c in CPython and came across this codestdin_encoding = _PyObject_GetAttrId(fin, &PyId_encoding);, but I couldn't find any documentation of it.
What is _PyObject_GetAttrId()?
https://github.com/python/cpython/blob/master/Python/sysmodule.c#L597
Solution 1:[1]
The ...Id family of functions are internal-only CPython optimizations. Instead of allocating a PyObject* string for the identifier name, they have an intern pool of identifiers that they can use.
You can see in the implementation that they can pull out a lazily allocated str with _PyUnicode_FromId.
Solution 2:[2]
My assumption is it's the implementation of the python __getattr__ magic method.
Take a look at this list of magic methods for more information.
Sources
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Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | tekknolagi |
| Solution 2 | Tushar Sadhwani |