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Thu Feb 14 13:16:03 CET 2008 · https://mail.python.org/pipermail/python-dev/2008-February/076869.html

While implementing "".format(), I need to call the builtin format()
function, which I've already implemented (in
bltinmodule.c:builtin_format()).  In the py3k branch, I just hardcoded
the same functionality into "".format(), which seems like the wrong 
thing to do, given how complex the code is.

I see 2 approaches:

1: exposing builtin_format(), probably giving it another name 
(PyObject_Format?) and moving it somewhere other than bltinmodule.c.

2: Instead of calling the C code directly, lookup "format" in Python's
builtins, and call it.  This, I think, would allow you to override the
global format() function if you wanted to modify the behavior (although
I can't think of any use case for wanting to do that).

I don't see where either behavior is specified in the PEP.

If option 2 is preferred, could someone give me a pointer to how to find 
a builtin function from C code?

Thanks.

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Showing content from https://mail.python.org/pipermail/python-dev/2008-February/076869.html below:

[Python-Dev] Calling a builtin from C code; PEP 3101 format() builtin