Commit 608e6eb2 authored by Alex Gaynor's avatar Alex Gaynor
Browse files

Added an explanatory comment. Refs #22017

parent 666990a2

django/utils/autoreload.py

+3 −0
Original line number Diff line number Diff line
@@ -81,6 +81,9 @@ def gen_filenames(): 
    Yields a generator over filenames referenced in sys.modules and translation

    files.

    """

    # N.B. ``list(...)`` is needed, because this runs in parallel with

    # application code which might be mutating ``sys.modules``, and this will

    # fail with RuntimeError: cannot mutate dictionary while iterating

    filenames = [filename.__file__ for filename in list(sys.modules.values())

                if hasattr(filename, '__file__')]