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class float(object):
"""
float(x) -> floating point number
Convert a string or number to a floating point number, if possible.
"""
def as_integer_ratio(self):
""" 获取改值的最简比 """
"""
float.as_integer_ratio() -> (int, int)
Return a pair of integers, whose ratio is exactly equal to the original
float and with a positive denominator.
Raise OverflowError on infinities and a ValueError on NaNs.
>>> (10.0).as_integer_ratio()
(10, 1)
>>> (0.0).as_integer_ratio()
(0, 1)
>>> (-.25).as_integer_ratio()
(-1, 4)
"""
pass
print (float.as_integer_ratio(1.0))1
def conjugate(self, *args, **kwargs): # real signature unknown
""" Return self, the complex conjugate of any float. """
pass
def fromhex(self, string):
""" 将十六进制字符串转换成浮点型 """
"""
float.fromhex(string) -> float
Create a floating-point number from a hexadecimal string.
>>> float.fromhex(‘0x1.ffffp10‘)
2047.984375
>>> float.fromhex(‘-0x1p-1074‘)
-4.9406564584124654e-324
"""
return 0.0
def hex(self):
""" 返回当前值的 16 进制表示 """
"""
float.hex() -> string
Return a hexadecimal representation of a floating-point number.
>>> (-0.1).hex()
‘-0x1.999999999999ap-4‘
>>> 3.14159.hex()
‘0x1.921f9f01b866ep+1‘
"""
return ""
print (float.hex(1.0)) 0x1.0000000000000p+0
def is_integer(self, *args, **kwargs): # real signature unknown
""" Return True if the float is an integer. """
pass
def __abs__(self):
""" x.__abs__() <==> abs(x) """
pass
绝对值
def __add__(self, y):
""" x.__add__(y) <==> x+y """
pass
加法
def __coerce__(self, y):
""" x.__coerce__(y) <==> coerce(x, y) """
pass
def __divmod__(self, y):
""" x.__divmod__(y) <==> divmod(x, y) """
pass
print (float.__divmod__(4.0,2)) (2.0, 0.0) 浮点除，余小数
def __div__(self, y):
""" x.__div__(y) <==> x/y """
pass
def __eq__(self, y):
""" x.__eq__(y) <==> x==y """
pass
print(float.__eq__(1.0,1.0)) True 是否相等
def __float__(self):
""" x.__float__() <==> float(x) """
pass
print(float.__float__(2.0)) 2.0转换为小数
def __floordiv__(self, y):
""" x.__floordiv__(y) <==> x//y """
pass
print(float.__floordiv__(5.0,2.0)) 2.0 整除
def __format__(self, format_spec):
"""
float.__format__(format_spec) -> string
Formats the float according to format_spec.
"""
return ""
def __getattribute__(self, name):
""" x.__getattribute__(‘name‘) <==> x.name """
pass
def __getformat__(self, typestr):
"""
float.__getformat__(typestr) -> string
You probably don‘t want to use this function. It exists mainly to be
used in Python‘s test suite.
typestr must be ‘double‘ or ‘float‘. This function returns whichever of
‘unknown‘, ‘IEEE, big-endian‘ or ‘IEEE, little-endian‘ best describes the
format of floating point numbers used by the C type named by typestr.
"""
return ""
def __getnewargs__(self, *args, **kwargs): # real signature unknown
pass
def __ge__(self, y):
""" x.__ge__(y) <==> x>=y """
pass
大于等于 print(float.__ge__(2.0,1.0)) True
def __gt__(self, y):
""" x.__gt__(y) <==> x>y """
pass
大于
def __hash__(self):
""" x.__hash__() <==> hash(x) """
pass
print(float.__hash__(5.0)) 5 去掉小数
def __init__(self, x):
pass
print(float.__init__(2.0)) 空值
def __int__(self):
""" x.__int__() <==> int(x) """
pass
转换为整数print(float.__int__(1.0)) 1
def __le__(self, y):
""" x.__le__(y) <==> x<=y """
pass
小于等于
print(float.__le__(1.0,2.0)) True
def __long__(self):
""" x.__long__() <==> long(x) """
pass
转换为长整型
def __lt__(self, y):
""" x.__lt__(y) <==> x<y """
pass
小于
def __mod__(self, y):
""" x.__mod__(y) <==> x%y """
pass
取余数
print(float.__mod__(2.0,1.0)) 0.0
def __mul__(self, y):
""" x.__mul__(y) <==> x*y """
pass
乘
print(float.__mul__(1.0,2.0)) 2.0
def __neg__(self):
""" x.__neg__() <==> -x """
pass
print(float.__neg__(1.0)) -1.0 转换为负数
@staticmethod # known case of __new__
def __new__(S, *more):
""" T.__new__(S, ...) -> a new object with type S, a subtype of T """
pass
def __ne__(self, y):
""" x.__ne__(y) <==> x!=y """
pass
是否不相等 print(float.__ne__(1.0,1.0)) False
def __nonzero__(self):
""" x.__nonzero__() <==> x != 0 """
pass
是否不等于0
def __pos__(self):
""" x.__pos__() <==> +x """
pass
def __pow__(self, y, z=None):
""" x.__pow__(y[, z]) <==> pow(x, y[, z]) """
pass
def __radd__(self, y):
""" x.__radd__(y) <==> y+x """
pass
加
def __rdivmod__(self, y):
""" x.__rdivmod__(y) <==> divmod(y, x) """
pass
print(float.__rdivmod__(2.0,1.0))除 取余数 (0.0, 1.0)
def __rdiv__(self, y):
""" x.__rdiv__(y) <==> y/x """
pass
除
def __repr__(self):
""" x.__repr__() <==> repr(x) """
pass
def __rfloordiv__(self, y):
""" x.__rfloordiv__(y) <==> y//x """
pass
地板除
def __rmod__(self, y):
""" x.__rmod__(y) <==> y%x """
pass
取余数
def __rmul__(self, y):
""" x.__rmul__(y) <==> y*x """
pass
乘
def __rpow__(self, x, z=None):
""" y.__rpow__(x[, z]) <==> pow(x, y[, z]) """
pass
def __rsub__(self, y):
""" x.__rsub__(y) <==> y-x """
pass
print(float.__rsub__(1.0,2.0)) 1.0减
def __rtruediv__(self, y):
""" x.__rtruediv__(y) <==> y/x """
pass
print(float.__rtruediv__(2.0,1.0)) 0.5 除法
def __setformat__(self, typestr, fmt):
"""
float.__setformat__(typestr, fmt) -> None
You probably don‘t want to use this function. It exists mainly to be
used in Python‘s test suite.
typestr must be ‘double‘ or ‘float‘. fmt must be one of ‘unknown‘,
‘IEEE, big-endian‘ or ‘IEEE, little-endian‘, and in addition can only be
one of the latter two if it appears to match the underlying C reality.
Override the automatic determination of C-level floating point type.
This affects how floats are converted to and from binary strings.
"""
pass
def __str__(self):
""" x.__str__() <==> str(x) """
pass
print(float.__str__(1.0)) 转换为字符
def __sub__(self, y):
""" x.__sub__(y) <==> x-y """
pass
print(float.__sub__(2.0,1.0)) 1.0 减法
def __truediv__(self, y):
""" x.__truediv__(y) <==> x/y """
pass
print(float.__truediv__(3.0,1.5)) 整除
def __trunc__(self, *args, **kwargs): # real signature unknown
""" Return the Integral closest to x between 0 and x. """
pass
imag = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""the imaginary part of a complex number"""
real = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""the real part of a complex number"""
float
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原文地址：http://www.cnblogs.com/dahuige/p/5129784.html
