Commit b5b6c469 authored by Jérome Perrin's avatar Jérome Perrin

patches/python: override py3 builtin round to keep py2 behavior

parent 7c1db9dc
......@@ -174,3 +174,41 @@ def patch_linecache():
linecache.getlines = getlines
patch_linecache()
import decimal as _decimal
def round2(number, ndigits=None):
"""
See Python 2 documentation.
Rounds a number to a given precision in decimal digits (default
0 digits). The result is a floating point number. Values are rounded
to the closest multiple of 10 to the power minus ndigits; if two
multiples are equally close, rounding is done away from 0.
ndigits may be negative.
"""
if ndigits is None:
ndigits = 0
elif hasattr(ndigits, '__index__'):
# any type with an __index__ method should be permitted as
# a second argument
ndigits = ndigits.__index__()
if ndigits < 0:
exponent = 10 ** (-ndigits)
quotient, remainder = divmod(number, exponent)
if remainder >= exponent//2 and number >= 0:
quotient += 1
return float(quotient * exponent)
else:
exponent = _decimal.Decimal('10') ** (-ndigits)
d = _decimal.Decimal.from_float(number).quantize(
exponent, rounding=_decimal.ROUND_HALF_UP)
return float(d)
if sys.version_info > (2, ):
__builtins__['round'] = round2
from AccessControl.ZopeGuards import safe_builtins
safe_builtins['round'] = round2
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