from constants import $($PID$,$ INV, DISC, PRICE, CID, AGE, BUDGET, SPID,

PURCHASE$\_$NUM, DISCOUNT$\_$RATE$)$

# This function solution is provided as an example of a function that uses

# constants, complete with correct documentation.

def get$\_$pid$($product: str$)->$ str:

$\text{'}\text{'}\text{'}$Returns the ID of product 'product'.

Pre$-$condition: 'product' is a valid product.

$>>>$ get$\_$pid$(\text{'}372908$ALL$147\text{'})$

$\text{'}3729\text{'}$

$>>>$ get$\_$pid$(\text{'}999999$SEN$999\text{'})$

$\text{'}9999\text{'}$

$\text{'}\text{'}\text{'}$

return product$[$PID:PID $+4]$

# This function solution is provided as an example of a function that uses

# constants, complete with correct documentation.

def get$\_$inventory$($product: str$)->$ int:

$\text{'}\text{'}\text{'}$Returns the current inventory of product 'product'.

Pre$-$condition: 'product' is a valid product.

$>>>$ get$\_$inventory$(\text{'}372908$ALL$147\text{'})$

$8$

$>>>$ get$\_$inventory$(\text{'}999999$SEN$999\text{'})$

$99$

$\text{'}\text{'}\text{'}$

return int$($product$[$INV:INV $+2])$

# We provide the docstring for this function to help you get started.

def get$\_$discount$($product: str$)->$ str:

$\text{'}\text{'}\text{'}$Returns the discount type of product 'product'.

Pre$-$condition: 'product' is a valid product.

$>>>$ get$\_$discount$(\text{'}372908$ALL$147\text{'})$

'ALL'

$>>>$ get$\_$discount$(\text{'}999999$SEN$999\text{'})$

'SEN'

$\text{'}\text{'}\text{'}$

pass # replace this line with your solution

# We provide the docstring for this function to help you get started.

def get$\_$price$($product: str$)->$ int:

$\text{'}\text{'}\text{'}$Returns the price of product 'product'.

Pre$-$condition: 'product' is a valid product.

$>>>$ get$\_$price$(\text{'}372908$ALL$147\text{'})$

$147$

$>>>$ get$\_$price$(\text{'}999999$SEN$009\text{'})$

$9$

$>>>$ get$\_$price$(\text{'}999999$SEN$089\text{'})$

$89$

$\text{'}\text{'}\text{'}$

pass # replace this line with your solution

if $\_\_$name$\_\_==\text{'}\_\_$main$\_\_\text{'}$:

import doctest

doctest.testmod$()$