>>> tts()

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 0

Enter a new list of prices: [40,10,20,35,25]

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 1

Day Price
--- -----
  0 40.00
  1 10.00
  2 20.00
  3 35.00
  4 25.00

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 3

The average price is 26.0

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 4

The standard deviation is 10.677078252031311

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 5

The min price is 10 on day 1

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 6

Enter the threshold: 25
There is at least one price over 25

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 7

 Buy on day 1 at price 10
Sell on day 3 at price 35
Total profit: 25

(0) Input a new list of prices
(1) Print the current prices
(2) Find the latest price
(3) Find the average price
(4) Find the standard deviation
(5) Find the min price and its day
(6) Test a threshold
(7) Your TT investment plan
(8) Quit

Enter your choice: 8

See you yesterday!