diff options
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS | 12 |
1 files changed, 4 insertions, 8 deletions
@@ -20,14 +20,7 @@ Core and Builtins - Implement PEP 378, Format Specifier for Thousands Separator, for floats. -- The repr function switches to exponential notation at 1e16, not 1e17 - as it did before. This change applies to both 'short' and legacy - float repr styles. For the new repr style, it avoids misleading - output in some cases: an example is repr(2e16+8), which gives - '2.000000000000001e+16'; without this change it would have produced - '20000000000000010.0' instead. - -- Similarly, the str function switches to exponential notation at +- The str function switches to exponential notation at 1e11, not 1e12. This avoids printing 13 significant digits in situations where only 12 of them are correct. Example problem value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a @@ -44,6 +37,9 @@ Core and Builtins finite float x, repr(x) now outputs a string based on the shortest sequence of decimal digits that rounds to x. Previous behaviour was to output 17 significant digits and then strip trailing zeros. + Another minor difference is that the new repr switches to + exponential notation at 1e16 instead of the previous 1e17; this + avoids misleading output in some cases. There's a new sys attribute sys.float_repr_style, which takes the value 'short' to indicate that we're using short float repr, |