File parsing: Option to raise exception instead of warning#520
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mtmail wants to merge 1 commit intotheskumar:mainfrom
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File parsing: Option to raise exception instead of warning#520mtmail wants to merge 1 commit intotheskumar:mainfrom
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AhsanSheraz
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Mar 15, 2026
Add opt-in strict mode that raises exceptions instead of silently ignoring errors. When `strict=True`: - `FileNotFoundError` is raised if the .env file is not found - `ValueError` is raised if any line cannot be parsed, with line number Defaults to `False` for full backwards compatibility. Closes theskumar#631 Related: theskumar#467, theskumar#297, theskumar#321, theskumar#520, theskumar#591 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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AhsanSheraz
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Mar 15, 2026
Add opt-in strict mode that raises exceptions instead of silently ignoring errors. When `strict=True`: - `FileNotFoundError` is raised if the .env file is not found - `ValueError` is raised if any line cannot be parsed, with line number Defaults to `False` for full backwards compatibility. Closes theskumar#631 Related: theskumar#467, theskumar#297, theskumar#321, theskumar#520, theskumar#591
AhsanSheraz
pushed a commit
to AhsanSheraz/python-dotenv
that referenced
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Mar 15, 2026
Add opt-in strict mode that raises exceptions instead of silently ignoring errors. When `strict=True`: - `FileNotFoundError` is raised if the .env file is not found - `ValueError` is raised if any line cannot be parsed, with line number Defaults to `False` for full backwards compatibility. Closes theskumar#631 Related: theskumar#467, theskumar#297, theskumar#321, theskumar#520, theskumar#591
AhsanSheraz
pushed a commit
to AhsanSheraz/python-dotenv
that referenced
this pull request
Mar 15, 2026
Add opt-in strict mode that raises exceptions instead of silently ignoring errors. When `strict=True`: - `FileNotFoundError` is raised if the .env file is not found - `ValueError` is raised if any line cannot be parsed, with line number Defaults to `False` for full backwards compatibility. Closes theskumar#631 Related: theskumar#467, theskumar#297, theskumar#321, theskumar#520, theskumar#591
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I dealed with an
.envfile that accidentially contained an unparsable line (example:datebase_name='some_value). The software which usedpython-dotenvfor configuration then set a default value and I almost wrote to a wrong database.Related to #467 which also asks for an option to raise an error instead of just issuing a warning on parse errors.
Happy to change the variable naming and open to other feedback you may have.
Tests including linting pass.