Mark Dickinson <dicki...@gmail.com> added the comment:
For 'g' formatting (either {} style or %-style) with precision p >= 1, I
believe fixed-
point is used if and only if the formatted value satisfies
1e-4 <= abs(formatted_value) < 10**precision.
Note that the 'formatted value' refers to the value rounded to p significant
figures,
not the original value of the number being formatted. For example, in '%.6g' %
9.999999e-5, the float rounded to 6 places is 1e-4, so the result is '0.0001',
using
fixed-point. But '%.6g' % 9.999994e-5 gives '9.99999e-05'.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue7051>
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