random module中的method, 生成随机数的步骤:(指定一个seed) ---> (随机数产生算法) ---> 取到 [0,1) 范围内随机分布的随机数.
To completely reset between runs, you will have to restart the kernel via the menu option (Run -> Restart Kernel) or via the keyboard (Ctrl with the period key).
with random.seed() (without any arguments), you can reset the seed to use the system clock, when you are writing a program and would like to generate pseudorandom number later on in the code.