ActiveState Recipes站点具有在Python中实现Internal Rate of Return的功能:def irr(cashflows, iterations=100):"""The IRR or Internal Rate of Return is the annualized effectivecompounded return rate which can be earned on the investedpyt
#!/usr/bin/python3
import time
class MyClass:"""一个简单的类实例"""def __init__(self,i):self.input = idef f(self):return 'hello world'# 实例化类
x = MyClass(123)# 访问类的属性和方法
print("MyClass 类的属性 i 为&