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Description
Bug report
Bug description:
The configparser modules throws an Exception as:
Traceback (most recent call last): File "test.py", line 4, in <module> config.get("dummy", "b") File "python3.12/configparser.py", line 777, in get return self._interpolation.before_get(self, section, option, value, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "python3.12/configparser.py", line 428, in before_get self._interpolate_some(parser, option, L, value, section, defaults, 1) File "python3.12/configparser.py", line 481, in _interpolate_some if "$" in v: ^^^^^^^^TypeError: argument of type 'NoneType' is not iterablewhen using:
config.ini
[dummy]ab = ${a}
and following ConfigParser settings:
test.py
importconfigparserconfig=configparser.ConfigParser(interpolation=configparser.ExtendedInterpolation(),allow_no_value=True)config.read("config.ini")config.get("dummy","b")
Since the value of a is None the interpolation should convert the reference first to an empty string to keep interpolation alive.
Expected value for b would be an empty string.
CPython versions tested on:
3.12, 3.13
Operating systems tested on:
Linux, Windows