gh-65697: Improved error msg for configparser key validation (#135527) · python/cpython@81237fb · GitHub
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gh-65697: Improved error msg for configparser key validation (#135527)
* Improved error msg for configparser key validation and added note in 3.14 whatsnew * Properly added change to configparser * 📜🤖 Added by blurb_it. --------- Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
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‎Doc/whatsnew/3.14.rst‎

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‎Lib/configparser.py‎

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@@ -1218,11 +1218,14 @@ def _convert_to_boolean(self, value):
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def _validate_key_contents(self, key):
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"""Raises an InvalidWriteError for any keys containing
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delimiters or that match the section header pattern"""
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delimiters or that begins with the section header pattern"""
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if re.match(self.SECTCRE, key):
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raise InvalidWriteError("Cannot write keys matching section pattern")
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if any(delim in key for delim in self._delimiters):
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raise InvalidWriteError("Cannot write key that contains delimiters")
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raise InvalidWriteError(
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f"Cannot write key {key}; begins with section pattern")
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for delim in self._delimiters:
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if delim in key:
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raise InvalidWriteError(
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f"Cannot write key {key}; contains delimiter {delim}")
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def _validate_value_types(self, *, section="", option="", value=""):
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"""Raises a TypeError for illegal non-string values.

‎Misc/NEWS.d/next/Library/2025-06-15-03-03-22.gh-issue-65697.COdwZd.rst‎

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