diff options
Diffstat (limited to 'Doc/library/dis.rst')
| -rw-r--r-- | Doc/library/dis.rst | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst index f8f4188..225ef32 100644 --- a/Doc/library/dis.rst +++ b/Doc/library/dis.rst @@ -75,7 +75,8 @@ the following command can be used to display the disassembly of >>> dis.dis(myfunc) 2 RESUME 0 <BLANKLINE> - 3 LOAD_GLOBAL 1 (len + NULL) + 3 LOAD_GLOBAL 0 (len) + PUSH_NULL LOAD_FAST 0 (alist) CALL 1 RETURN_VALUE @@ -207,6 +208,7 @@ Example: ... RESUME LOAD_GLOBAL + PUSH_NULL LOAD_FAST CALL RETURN_VALUE @@ -1215,11 +1217,20 @@ iterations of the loop. .. opcode:: LOAD_ATTR (namei) - If the low bit of ``namei`` is not set, this replaces ``STACK[-1]`` with - ``getattr(STACK[-1], co_names[namei>>1])``. + Replaces ``STACK[-1]`` with ``getattr(STACK[-1], co_names[namei>>1])``. - If the low bit of ``namei`` is set, this will attempt to load a method named - ``co_names[namei>>1]`` from the ``STACK[-1]`` object. ``STACK[-1]`` is popped. + .. versionchanged:: 3.12 + If the low bit of ``namei`` is set, then a ``NULL`` or ``self`` is + pushed to the stack before the attribute or unbound method respectively. + + .. versionchanged:: 3.14 + Reverted change from 3.12. The low bit of ``namei`` has no special meaning. + + +.. opcode:: LOAD_METHOD (namei) + + Attempt to load a method named ``co_names[namei>>1]`` from the ``STACK[-1]`` object. + ``STACK[-1]`` is popped. This bytecode distinguishes two cases: if ``STACK[-1]`` has a method with the correct name, the bytecode pushes the unbound method and ``STACK[-1]``. ``STACK[-1]`` will be used as the first argument (``self``) by :opcode:`CALL` @@ -1227,9 +1238,7 @@ iterations of the loop. Otherwise, ``NULL`` and the object returned by the attribute lookup are pushed. - .. versionchanged:: 3.12 - If the low bit of ``namei`` is set, then a ``NULL`` or ``self`` is - pushed to the stack before the attribute or unbound method respectively. + .. versionadded:: 3.14 .. opcode:: LOAD_SUPER_ATTR (namei) @@ -1926,12 +1935,6 @@ but are replaced by real opcodes or removed before bytecode is generated. This opcode is now a pseudo-instruction. -.. opcode:: LOAD_METHOD - - Optimized unbound method lookup. Emitted as a ``LOAD_ATTR`` opcode - with a flag set in the arg. - - .. _opcode_collections: Opcode collections |