code this project based on the parameters given in python There is only one checkout line. An event in this system might be the checker scanning a customer's item or a new customer joining the checkout line $($or both$).$ You will track how the line changes as customers are added at the end of the line and move forward through the line.

During each tick of the simulator clock, the cashier scans one item from the basket of the customer at the head of the line. When that customer's basket is empty, they exit the line. On any tick, a new customer may also be added at the end of the line. To be realistic, most simulations, including ours, involve inputs arriving randomly but under some specified probability distribution; customers arrive at random intervals and purchase random numbers of items. The similation is driven by an "event list." Each item on the event list for our market simulator is a non$-$negative integer. Reading an item from the list is interpreted as ticking the simulator clock. At each tick, the line advances. That means to remove one item from the basket of the customer at the head of the line $($unless the line is empty$)$ and, if their basket becomes empty, they exit the line. But something else potentially happens on a tick: if the current event is non$-$zero, a new customer is added at the rear of the checkout line with that many items in their basket. For example, if the event item is $5,$ a new customer is created with a basket containing $5$ items and the customer joins the checkout line. Number customers consecutively as you create them. At the end of each tick, you should also print out the current line. See the sample output below.

Finally, to make it easier for the TAs to grade your program, the event list will be supplied in a file, one event per line. $($This is also to give you practice in creating and reading files.$)$ You will process the file to create the event list. That is$,$ create the event list all at once prior to running the simulation, by reading successive items from the file and storing them in a list. You will write one function to generate the file and another function to read items from the file and store them on a list. The function to create the file is parameterized so that you can control the length of the list, the frequency with which new customers arrive and how many items they can purchase. See the link for a template below.

import random

import os$.$path

The following function is useful and can be used as is; there is no

reason to change it$.$

def addCustomer$($ percent $)$:

$"""$This function returns True with a certain probability. For

example, if percent is $35,$ then this returns True $35\%$ of the

times you call it and returns False $65\%$ of the time. This is

a useful trick in a simulation. $"""$

return random.randint$(0,99)$ percent

def generateEventsFile$($ N$,$ perc, maxItems, fileName $)$:

$"""$Create a file of N lines to drive the simulation. Each line in the

file contains a single non$-$negative integer in range

$[0...$maxItems$].$ Lines are non$-$zero perc percentage of the time.

Use the function addCustomer$($ percent$)$ to decide whether the

item should be zero or a random integer between $1$ and maxItems,

inclusive. The idea is that if a line is zero, no new customer

has arrived during that clock tick. Otherwise, a new customer

has arrived at the cashier line with that many items in their

basket. Remember to close the file."""

pass

def generateEventListFromFile$($ filename $)$:

$"""$Given a filename containing events, generate a list of the events

suitable for the simulateCheckoutLine function. Be sure to

check that the file exists and print an error message and exit

if not."""

pass

#### Customer Class ######

class Customer:

def init$($self$,$ custNum, itemCount$)$:

$"""$A new customer is assigned a customer number and also a number of

items in their basket.

$"""$

pass

def getCustomerNumber$($self$)$:

$"""$Getter for the customer's number."""

pass

def getItemsCount$($self$)$:

$"""$Getter for the customer's current count of items."""

class Customer:

def $\_$ init$\_\_($self$,$ custNum, itemCount$)$:

$""$ "A new customer is assigned a customer number and also a number of

items in their basket.

$"""$

pass

def getCustomerNumber$($self$)$:

$"""$Getter for the customer's number."""

pass

def getItemsCount$($self$)$:

$"""$Getter for the customer's current count of items."""

pass

def decrementItemsCount$($self$)$:

$"""$Ring up $($remove$)$ one item from this customer's basket.

Typically, we'll only call this on the first customer in line."""

pass

def customerFinished$($self$)$:

$"""$Boolean function indicating that this customer will depart on

the current tick, i$.$e$.,$ there are zero items in their basket.

Typically we'll only call this on the first customer in line."""

pass

def str$($self$)$:

$"""$If this is customer n with k items in basket,

return $\text{'}$Cn$($k$)\text{'}"""$

pass

### CheckoutLine Class #

class CheckoutLine:

$"""$A checkout line is implemented as a list with customers added at the front

$($L$[0])$ and removed from the rear

class CheckoutLine:

$"""$A chec

d