python/bin/repl_stub.py

"""Simulates the REPL that Python spawns when invoking the binary with no arguments.

The code module is responsible for the default shell.

The import and `ocde.interact()` call here his is equivalent to doing:

    $ python3 -m code
    Python 3.11.2 (main, Mar 13 2023, 12:18:29) [GCC 12.2.0] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    (InteractiveConsole)
    >>>

The logic for PYTHONSTARTUP is handled in python/private/repl_template.py.
"""

# Capture the globals from PYTHONSTARTUP so we can pass them on to the console.
console_locals = globals().copy()

import code
import sys

if sys.stdin.isatty():
    # Use the default options.
    exitmsg = None
else:
    # On a non-interactive console, we want to suppress the >>> and the exit message.
    exitmsg = ""
    sys.ps1 = ""
    sys.ps2 = ""

# We set the banner to an empty string because the repl_template.py file already prints the banner.
code.interact(local=console_locals, banner="", exitmsg=exitmsg)