Method call on imported definition differs inside of a list comprehension

Bug report

Bug description:

import re
[x for x in [] if re.match(".*", x)]

vs:

import re
re.match(".*", x)

When you disassemble these you'll see the inlined one will be doing a LOAD_ATTR 3 (match + NULL|self) while the one outside of the comprehension will be doing a PUSH_NULL/CALL which is to disable the method call optimization on things which are likely not methods.

These should both have the same byte code. There's no perceivable code execution difference other than performance though.

CPython versions tested on:

3.12, CPython main branch

Operating systems tested on:

Linux

首先在 CPython 3.12 或 main 上对报告中的两个 Python 示例进行反汇编，然后跟踪列表推导式和顶层调用路径是如何编译的。完成的标准是两种形式都为导入定义的调用使用一致的字节码，同时不改变可观察行为。