[issue19640] Dynamically generate the _source attribute of namedtuple to save memory)

[Raymond Hettinger]

Changes by Raymond Hettinger <raymond.hettinger at gmail.com>:


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priority: normal -> low
title: Drop _source attribute of namedtuple (waste memory) -> Dynamically generate the _source attribute of namedtuple to save memory)

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19640>
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