There are actually 3 different filenames for the python history history_filename circling around.

In vanilla Python 3.10, without pyreadlineX, the python history is hard-coded to: ~/.python_history. (Unfortunately!)
See PR discussions here and here. (Clearly even the cpython dev's have no idea where this is going!) 🤣

• https://github.com/python/cpython/blob/99fcf1505218464c489d419d4500f126b6d6dc28/Lib/site.py#L473-L474

However, here in pyreadlineX, we have 2 different ones.

1. In ./lineeditor/history:

class LineHistory(object):
	    def __init__(self):
	        self.history = []
	        self._history_length = 100
	        self._history_cursor = 0
	        # Cannot expand unicode strings correctly on python2.4
	        self.history_filename = os.path.expanduser(ensure_str('~/.history'))
	        self.lastcommand = None
	        self.query = ""
	        self.last_search_for = ""

2. In ./configuration/pyreadlineconfig.ini:

history_filename("~/.pythonhistory")

3. (and again used in various places in) ./rlmain.py:

        def sethistoryfilename(filename):
	            self.mode._history.history_filename = os.path.expanduser(
	                ensure_str(filename))

Neither of these should be used, AFAICT, unless the purpose is different from what should be obvious.

The only thing, I would hate, is if that it would overwrite (or interfere with) the already built-in history.