Branch: refs/heads/master Home: https://github.com/python/cpython Commit: d7e64337ef45085792b382a09f5b3a45d3687c8c https://github.com/python/cpython/commit/d7e64337ef45085792b382a09f5b3a45d3687c8c Author: Martijn Pieters <github.com at zopatista.com> Date: 2017年02月23日 (2017年2月23日) Changed paths: M Lib/test/test_unicode.py M Misc/NEWS M Python/ceval.c Log Message: ----------- bpo-28598: Support __rmod__ for RHS subclasses of str in % string formatting operations (#51) When you use `'%s' % SubClassOfStr()`, where `SubClassOfStr.__rmod__` exists, the reverse operation is ignored as normally such string formatting operations use the `PyUnicode_Format()` fast path. This patch tests for subclasses of `str` first and picks the slow path in that case. Patch by Martijn Pieters.