Formatting floats without trailing zeros

Question

How can I format a float so that it doesn\'t contain trailing zeros? In other words, I want the resulting string to be as short as possible.

For example:

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Answer 1

Use %g with big enough width, for example '%.99g'. It will print in fixed-point notation for any reasonably big number.

EDIT: it doesn't work

>>> '%.99g' % 0.0000001
'9.99999999999999954748111825886258685613938723690807819366455078125e-08'