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Fixed #29534 - _decimal difference with _pydecimal (#65)

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Andrew Nester 2017-02-14 21:22:55 +03:00 • committed by Mark Dickinson
parent c33ee85b6f
commit 6d1dece06d
3 changed files with 28 additions and 11 deletions
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27
Lib/_pydecimal.py
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@ -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: