[issue3439] create a numbits() method for int and long types

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

Other possible wording:

 ... so that ``k`` is approximately ``1 + int(log(abs(x), 2))``.

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assignee: marketdickinson -> rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3439>
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