bug#71440: Python Inferior Mode Can’t Recognize My Prompt

["shynur ." <one.last.kiss@outlook.com>]

I set the ‘PYTHONSTARTUP’ environment variable to a file
whose content is

```python
import sys
sys.ps1, sys.ps2 = "\033[32m►\033[0m", "\033[32m▻\033[0m"
```

It works well if I start Python3 in my terminal (Windows
Terminal, windows11’s built-in app).

However, if I use it in Emacs:

1. open a Python file in Emacs
2. type ‘C-c C-p’ (run-python)
3. in the buffer visiting the Python file, type ‘C-c C-c’
   (python-shell-send-buffer)

Python will throw an error:

```
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name '__PYTHON_EL_eval' is not defined
```