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 上對報告中的兩個 Python 範例進行反組譯，然後追蹤串列推導式和頂層呼叫路徑是如何編譯的。完成的標準是兩種形式都為匯入定義的呼叫使用一致的位元組碼，同時不改變可觀察的行為。