1. Where are we going?
- Python!
- Basicis functions vars types arithmetic logic etc…
- Designing our own types, exceptions, writing programs made up of multiple functions
- Python programming with Libraries
2. How are we going to do all of this?
3. Jobs
Medical Billing Company: whether the company should pay for their workers’ injury bills which caused in working time.
Target Customers: Insurance Company
Python
expressions get evaluted, and have a result
3.0除法全部采用浮点制
trackpack，观察错误信息时，从下面开始看
所有错误本身就是一个对象，每个对象都有一个type
type(xxxx)可以显示括号内对象的type，而这个type本身也是一个对象，是一个type对象
int 可以无限大整数
float
豆知识：python整除的时候，如果15.0//3.0会是5.0。先运算前面的算式，在进行向下取整。
5-3-2，编程语言大多是从左开始的
豆知识：阶乘是从右开始的 4**3**2=4**(3**2)!=(4**3)**2