Evenly round to the given number of decimals. 翻译就是:a表示需要保留小数位数的数组或数字,decimals表示要保留的小数位数 In [138]: np.around(3.124, 2) Out[138]: 3.12 In [139]: np.around(3.125, 2) Out[139]: 3.12 In [140]: np.around(3.126, 2) Out[140]: 3.13 结果:会进行“舍入...
print(type(z)) Try it Yourself » Int Int, or integer, is a whole number, positive or negative, without decimals, of unlimited length. Example Integers: x =1 y =35656222554887711 z =-3255522 print(type(x)) print(type(y)) print(type(z)) ...
importmath#圆周率#Output: 3.141592653589793print(math.pi)#余弦#Output: -1.0print(math.cos(math.pi))#指数#Output: 22026.465794806718print(math.exp(10))#对数#Output: 3.0print(math.log10(1000))#反正弦#Output: 1.1752011936438014print(math.sinh(1))#阶乘#Output: 720print(math.factorial(6)) random模...
When you format a number as fixed point, it’s always displayed with the precise number of decimal places that you specify: Python >>> n = 1 >>> f"The value of n is {n:.2f}" 'The value of n is 1.00' >>> f"The value of n is {n:.3f}" 'The value of n is 1.000' ...
num1 = int(2.3)print(num1)# prints 2num2 = int(-2.8)print(num2)# prints -2num3 = float(5)print(num3)# prints 5.0num4 = complex('3+5j')print(num4)# prints (3 + 5j) Run Code Here, when converting from float to integer, the number gets truncated (decimal parts are removed...
这里的函数round(float numeral, remained decimals number)指的是向0方向进行四舍五入运算。这里均为保留两位小数,但是输出的结果中并非每一次的输出均能够让5进位。这样的时好时坏的函数,非常诡异!! (3)奇进偶舍现象 print(round(4.5)) # 4 print(round(5.5)) # 6 和上面类似,这里也同时出现了四舍五入...
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 View Code 举个例子 number = 0.25 print(number.as_integer_ratio()) #运行结果 (1,...
decimal 允许控制计算，包括精确位数跟舍入运算。可以通过创建上下文管理器进行设置更改，示例如下：>>> from decimal import localcontext>>> a = Decimal('1.3')>>> b = Decimal('1.7')>>> print(a/b)0.7647058823529411764705882353>>> with localcontext() as ctx:... ctx.prec = 3 # 精确位数.....
If the separator is not found, return S and two empty strings. """ pass 1. 2. 3. 4. 5. 6. 7. 8. 9. #!/usr/bin/python str = "http:///" print str.partition("://") 输出结果为: ('http', '://', '/') 1. 2. 3. 4. 5. 6. 7. def replace(self, old, new, ...
print(2 ** 3) # 8 (2*2*2 = 8) print(14 // 3) # 4 (用/结果为4.666666666666667) print(14 % 4) # 2 (3*4=12 余2) 1. 2. 3. 4. 5. 6. 7. 8. 9. 常用数学函数 需要导入相应的math类和random类 import math import random ...