diff options
Diffstat (limited to 'Lib/_pydecimal.py')
| -rw-r--r-- | Lib/_pydecimal.py | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/Lib/_pydecimal.py b/Lib/_pydecimal.py index 0b40928..0fa152c 100644 --- a/Lib/_pydecimal.py +++ b/Lib/_pydecimal.py @@ -734,18 +734,23 @@ class Decimal(object): """ if isinstance(f, int): # handle integer inputs - return cls(f) - if not isinstance(f, float): - raise TypeError("argument must be int or float.") - if _math.isinf(f) or _math.isnan(f): - return cls(repr(f)) - if _math.copysign(1.0, f) == 1.0: - sign = 0 + sign = 0 if f >= 0 else 1 + k = 0 + coeff = str(abs(f)) + elif isinstance(f, float): + if _math.isinf(f) or _math.isnan(f): + return cls(repr(f)) + 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 + coeff = str(n*5**k) 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) + raise TypeError("argument must be int or float.") + + result = _dec_from_triple(sign, coeff, -k) if cls is Decimal: return result else: |