def __new__(cls, val=fzero, **kwargs):
"""A new mpf can be created from a Python float, an int, a
or a decimal string representing a number in floating-point
format."""
prec, rounding = cls.context._prec_rounding
if kwargs:
prec = kwargs.get('prec', prec)
if 'dps' in kwargs:
prec = dps_to_prec(kwargs['dps'])
rounding = kwargs.get('rounding', rounding)
if type(val) is cls:
sign, man, exp, bc = val._mpf_
if (not man) and exp:
return val
v = new(cls)
v._mpf_ = normalize(sign, man, exp, bc, prec, rounding)
return v
elif type(val) is tuple:
if len(val) == 2:
v = new(cls)
v._mpf_ = from_man_exp(val[0], val[1], prec, rounding)
return v
if len(val) == 4:
sign, man, exp, bc = val
v = new(cls)
v._mpf_ = normalize(sign, MPZ(man), exp, bc, prec, rounding)
return v
raise ValueError
else:
v = new(cls)
v._mpf_ = mpf_pos(cls.mpf_convert_arg(val, prec, rounding), prec,
rounding)
return v
def __new__(cls, val=fzero, **kwargs):
"""A new mpf can be created from a Python float, an int, a
or a decimal string representing a number in floating-point
format."""
prec, rounding = cls.context._prec_rounding
if kwargs:
prec = kwargs.get('prec', prec)
if 'dps' in kwargs:
prec = dps_to_prec(kwargs['dps'])
rounding = kwargs.get('rounding', rounding)
if type(val) is cls:
sign, man, exp, bc = val._mpf_
if (not man) and exp:
return val
v = new(cls)
v._mpf_ = normalize(sign, man, exp, bc, prec, rounding)
return v
elif type(val) is tuple:
if len(val) == 2:
v = new(cls)
v._mpf_ = from_man_exp(val[0], val[1], prec, rounding)
return v
if len(val) == 4:
sign, man, exp, bc = val
v = new(cls)
v._mpf_ = normalize(sign, MPZ(man), exp, bc, prec, rounding)
return v
raise ValueError
else:
v = new(cls)
v._mpf_ = mpf_pos(cls.mpf_convert_arg(val, prec, rounding), prec, rounding)
return v
def __hash__(s):
a, b = s._mpq_
if b == 1:
return hash(a)
# Power of two: mpf compatible hash
if not (b & (b-1)):
return mpf_hash(from_man_exp(a, 1-bitcount(b)))
return hash((a,b))
def __hash__(s):
a, b = s._mpq_
if b == 1:
return hash(a)
# Power of two: mpf compatible hash
if not (b & (b - 1)):
return mpf_hash(from_man_exp(a, 1 - bitcount(b)))
return hash((a, b))
