Python math 模块与 cmath 模块分类 编程技术 Python math 模块提供了许多对浮点数的数学运算函数。 Python cmath 模块包含了一些用于复数运算的函数。 cmath 模块的函数跟 math 模块函数基本一致,区别是 cmath 模块运算的是复数,math 模块运算的是数学运算。 要使用 math 或 cmath 函数必须先导入: import math...
The methods in this module acceptsint,float, andcomplexnumbers. It even accepts Python objects that has a__complex__()or__float__()method. The methods in this module almost always return a complex number. If the return value can be expressed as a real number, the return value has an ...
Help on built-in module math: NAME math DESCRIPTION This module is always available. It provides access to the mathematical functions defined by the C standard. 这个模块总是可用的。它提供了对由C标准定义的数学函数。 FUNCTIONS acos(x, /) Return the arc cosine (measured in radians) of x. 返...
>>> math.sqrt(10.2) 3.1937438845342623 负数的平方根的计算 >>> math.sqrt(-1) Traceback (most recent calllast): File"<stdin>", line1,in<module>ValueError: math domain error>>> >>>import cmath>>> cmath.sqrt(-1) 1j
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#python 3.4 from decimal import * c = getcontext() c.traps[FloatOperation] = True print(Decimal('3.14')) print(Decimal(3.14)) 结果输出例如以下: 3.14 Traceback (most recent call last): File "F:/temp/pywin/dec1.py", line 7, in <module> ...
#python 3.4 from decimal import * r = Decimal('0.00').logb() print(r) r = Decimal('5.00').logb() print(r) 结果输出如下: Traceback (most recent call last): File "F:\temp\pywin\dec1.py", line 4, in <module> r = Decimal('0.00').logb() ...
No module name '_ssl',但是我的系统是安装了openssl的1.0.1的，查了网络上的信息发现，Python3.7...
|see_cpython_module| python:cmath. The cmath module provides some basic mathematical functions for working with complex numbers. Availability: not available on WiPy and ESP8266. Floating point support required for this module. Functions cmath.cos(z) Return the cosine of z. cmath.exp(z) Re...
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