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Re:Show HN: Update your requirements.txt file with Pur in Py... by SilasX on Monday May 09, 2016 @04:49PM (#11663046)
Wait, wouldn't you get the same result from running -U on the contents of the requirements file (after stripping the == out)? i.e.

    sed 's/==.*//g' requirements.txt \
    | tr '\n' ' ' \
    | (read var; pip install -U $var) \
    && pip freeze > requirements.txt
Re:Show HN: Update your requirements.txt file with Pur in Py... by welder on Monday May 09, 2016 @05:35PM (#11663411)
What about comments, packages installed via git, recursive packages?