原作者： sxzhusta
.conjugate()，共轭复数
.denominator()，返回分母
.imag()，返回复数的虚数部分
.numerator()，返回分子
.real()，返回复数的实数部分
.as_interger_ratio()：
返回一对整数，其比例正好等于原浮动，并带有正分母。
.fromhex()：
类方法返回用十六进制字符串S表示的浮动。字符串可能有前向和后向空格。
.hex()：
返回浮点数作为十六进制字符串的表示形式。对于有限浮点数，这种表示法将总是包括一个引数0x和一个尾随的P和指数。
.is_integer()：
如果浮动实例具有积分值是有限的，则返回真，否则返回假：
math.acos()：反余弦（弧度）
math.acosh()：反双曲余弦
math.asin()：反正弦
math.asinh()：反双曲正弦
math.atan()：反正切
math.atan2()：
返回Atan（/x），以弧度为单位。结果是介于圆周率和圆周率之间。平面上的向量从原点到点(X,Y)使得这个角度与正x轴。
math.atanh()：反双曲正切
math.ceil()：
返回X的上限为浮点数，小于或等于？的最小整数值
math.copysign()：
在支持已签名零的平台上返回带有Y符号的X，复制符号(1.0,-0.0)返回-1.0。
math.cos()：余弦
math.cosh()：双曲余弦
math.degrees()：转弧度为度
math.e()：e
math.exp()：e的指数次方
math.fabs()：绝对值
math.factorial()：
返回X阶乘。
math.floor()：
Return the floor of x as a float, the largest integer value less than or equal tox.（小于等于x的最大整数）
math.fmod()：
Return fmod(x,y), as defined by the platform C library. Note that the Python expressionx%y may not return the same result. The intent of the C standard is thatfmod(x,y) be exactly (mathematically; to infinite precision) equal tox-n*y for some integer n such that the result has the same sign asx and magnitude less thanabs(y). Python’sx%y returns a result with the sign ofy instead, and may not be exactly computable for float arguments. For example,fmod(-1e-100,1e100) is -1e-100, but the result of Python’s-1e-100%1e100 is 1e100-1e-100, which cannot be represented exactly as a float, and rounds to the surprising1e100. For this reason, functionfmod() is generally preferred when working with floats, while Python’sx%y is preferred when working with integers.
matn.frexp()：
Return the mantissa and exponent of x as the pair (m, e). m is a float ande is an integer such thatx==m *2**e exactly. Ifx is zero, returns (0.0,0), otherwise 0.5<= abs(m)<1. This is used to “pick apart” the internal representation of a float in a portable way.
math.fsum()：
Return an accurate floating point sum of values in the iterable. Avoids loss of precision by tracking multiple intermediate partial sums:
math.htpot()：
Return the Euclidean norm, sqrt(xx+yy). This is the length of the vector from the origin to point(x,y).
math.isinf()：Check if the float x is positive or negative infinity
math.isnan()：Check if the float x is a NaN (not a number). For more information on NaNs, see the IEEE 754 standards
math.ldexp()：Return x * (2**i). This is essentially the inverse of functionfrexp()
math.log()：以e为底的对数
math.log10()：以10为底对数
math.log1p()：Return the natural logarithm of 1+x (base e). The result is calculated in a way which is accurate forx near zero
math.modf()：Return the fractional and integer parts of x. Both results carry the sign ofx and are floats.
math.pi()：π
math.pow()：x的y次幂
math.radians()：转度为弧度
math.sin()：正弦
math.sinh()：双曲正弦
math.sqrt()：平方根
math.tan()：正切
math.tanh()：双曲正切
matn.trunc()：Return the Real valuex truncated to anIntegral (usually a long integer). Uses the__trunc__ method