[Python-Dev] __qualname__ format question

Christian Tismer tismer at stackless.com
Sun Jun 25 08:06:31 EDT 2017

Hi friends,

by chance, I stumbled over


in methodobject.c and


in descrobject.c .

The first uses

    res = PyUnicode_FromFormat("%S.%s", type_qualname, m->m_ml->ml_name);

and the latter uses

    res = PyUnicode_FromFormat("%S.%S", type_qualname, descr->d_name);

To my knowledge, the "%S" character is undefined in C99 and C11.

Q: Why this character, and why this difference?

cheers - Chris
Christian Tismer             :^)   tismer at stackless.com
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