diff options
Diffstat (limited to 'Lib/decimal.py')
| -rw-r--r-- | Lib/decimal.py | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/Lib/decimal.py b/Lib/decimal.py index 197269c7d7..baff38bb5a 100644 --- a/Lib/decimal.py +++ b/Lib/decimal.py @@ -655,7 +655,8 @@ class Decimal(_numbers.Real): raise TypeError("Cannot convert %r to Decimal" % value) - @classmethod + # @classmethod, but @decorator is not valid Python 2.3 syntax, so + # don't use it (see notes on Py2.3 compatibility at top of file) def from_float(cls, f): """Converts a float to a decimal number, exactly. @@ -681,11 +682,18 @@ class Decimal(_numbers.Real): return cls(f) if _math.isinf(f) or _math.isnan(f): # raises TypeError if not a float return cls(repr(f)) - sign = 0 if _math.copysign(1.0, f) == 1.0 else 1 + if _math.copysign(1.0, f) == 1.0: + sign = 0 + else: + sign = 1 n, d = abs(f).as_integer_ratio() k = d.bit_length() - 1 result = _dec_from_triple(sign, str(n*5**k), -k) - return result if cls is Decimal else cls(result) + if cls is Decimal: + return result + else: + return cls(result) + from_float = classmethod(from_float) def _isnan(self): """Returns whether the number is not actually one. |