Generators through the C API

Duncan Booth duncan.booth at invalid.invalid
Fri Jul 31 11:41:34 CEST 2009

Lucas P Melo <lukepadawan at> wrote:

> Hello, I'm a total noob about the C API. Is there any way to create a 
> generator function using the C API? I couldn't find anything like the 
> 'yield' keyword in it.
> Thanks in advance.

You define a new type with tp_flags including Py_TPFLAGS_HAVE_ITER. 
Anything that would be a local variable in your generator needs to become 
an attribute in the type.

The tp_init initialization function should contain all the code up to the 
first yield, tp_iter should return self and tp_iternext should execute code 
up to the next yield.

Duncan Booth

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