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improve the documentation of the LOAD_METHOD and CALL_METHOD (GH-18079) 

(cherry picked from commit 8698b34b68)

Co-authored-by: Carl Friedrich Bolz-Tereick <cfbolz@gmx.de>
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Miss Islington (bot) 2020-01-20 17:04:36 -08:00 committed by GitHub
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Doc/library/dis.rst
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@ -1120,22 +1120,24 @@ All of the following opcodes use their arguments.
.. opcode:: LOAD_METHOD (namei)
Loads a method named ``co_names[namei]`` from TOS object. TOS is popped and
method and TOS are pushed when interpreter can call unbound method directly.
TOS will be used as the first argument (``self``) by :opcode:`CALL_METHOD`.
Otherwise, ``NULL`` and method is pushed (method is bound method or
something else).
Loads a method named ``co_names[namei]`` from the TOS object. TOS is popped.
This bytecode distinguishes two cases: if TOS has a method with the correct
name, the bytecode pushes the unbound method and TOS. TOS will be used as
the first argument (``self``) by :opcode:`CALL_METHOD` when calling the
unbound method. Otherwise, ``NULL`` and the object return by the attribute
lookup are pushed.
.. versionadded:: 3.7
.. opcode:: CALL_METHOD (argc)
Calls a method. *argc* is number of positional arguments.
Calls a method. *argc* is the number of positional arguments.
Keyword arguments are not supported. This opcode is designed to be used
with :opcode:`LOAD_METHOD`. Positional arguments are on top of the stack.
Below them, two items described in :opcode:`LOAD_METHOD` on the stack.
All of them are popped and return value is pushed.
Below them, the two items described in :opcode:`LOAD_METHOD` are on the
stack (either ``self`` and an unbound method object or ``NULL`` and an
arbitrary callable). All of them are popped and the return value is pushed.
.. versionadded:: 3.7