[Python] Simple Elevator Program Python Using While For Loop. Why does my loop not update...

My below loop in python which goes through a list of customers seems to once it removes a customer from the list go back to the start of the while loop instead of repeating through for the rest of the customers. Can somebody please have a look at what I am doing wrong? Entire code is below and attached.

author = 'Alan Doonan'

import random
import time


class Building: # defines class building
number_of_floors = 0 # sets number_of_floors variable to 0
customer_list = [] # creates an empty array for customer_list
elevator = 0 # sets elevator variable to 0

def __init__(self, floors, customers): # initialize Building
self.number_of_floors = floors # assigns floors entered to number_of_floors
for customerID in range(1, customers + 1): # assigns number of customers entered to customer_list in order
new = Customer(customerID,self.number_of_floors) # creates an instance called new of Customer class for number of customers entered in input
self.customer_list.append(new) # appends new instance of customer to customer_list
self.customer_list.sort(key = lambda x: x.current_floor) # sorts customer_list by current_floor customer is on # prints
self.elevator = Elevator(floors,self.customer_list) # creates instance of elevator with inputted floors and assigns customer_list to register_list # prints
self.run() # runs run method below

def run(self): # method to operate the elevator
print('++++++++++++++++++++++++++ELEVATOR IS NOW STARTING+++++++++++++++') # prints
print('There are %d customers in the building' % (len(self.customer_list))) # prints
number_of_customers = len(self.customer_list) # assigns current number of customers to number_of_customers variable
self.output() # runs output method below

def output(self):
for customer in self.customer_list: #prints lists of customers in building and their details
print("Customer",customer.customerID,"is on floor",customer.current_floor,"and wants to go to",customer.destination_floor)

#ELEVATOR MOVING UP LOOP
while (self.elevator.current_floor < self.elevator.number_of_floors):
self.elevator.current_floor +=1
print('ELEVATOR MOVING UP')
print(len(self.customer_list),'Customers in lift.')
print('++++++++++++++++++++++++++++++++++++++++++++++++++++')
print('FLOOR',self.elevator.current_floor)

for customer in self.customer_list: # Loop for each instance of Custumer in customer_list
if (self.elevator.current_floor == customer.current_floor) & customer.customer_direction == 1:
customer.in_elevator = True
print('Customer',customer.customerID,'has entered the lift')
if (self.elevator.current_floor == customer.destination_floor) & (customer.in_elevator == True) & customer.customer_direction ==1:
customer.in_elevator = False
self.customer_list.remove(customer)
print(customer.customerID,'has reached their destination')


#ELEVATOR MOVING DOWN LOOP
while (self.elevator.current_floor <= self.number_of_floors) & (self.elevator.current_floor > 1):
self.elevator.current_floor -= 1
print(len(self.customer_list),'Customers in lift.')
print('ELEVATOR MOVING DOWN')
print('++++++++++++++++++++++++++++++++++++++++++++++++++++')
print('FLOOR',self.elevator.current_floor)

for customer in self.customer_list:
if (customer.in_elevator == True):
customer.current_floor = self.elevator.current_floor
if (self.elevator.current_floor == customer.destination_floor) & (customer.in_elevator == True) & (customer.customer_direction == -1):
customer.in_elevator = False
self.customer_list.remove(customer)
print('Customer',customer.customerID,'has reached their destination')

print('There are',len(self.customer_list),'trapped in the elevator') #prints
print('There are',len(Elevator.register_list),'people left on the register')
print('Elevator run is done!!!') #prints

print('CUSTOMERS STUCK IN LIFT ARE BELOW')
for stuck in self.customer_list:
print('Cust. ID:',stuck.customerID,'Dest. Floor:',stuck.destination_floor,'Curr. Floor:',stuck.current_floor,'In Elevator',stuck.in_elevator,'Direction',stuck.customer_direction)


class Elevator:
number_of_floors = 0 # the number of floors
register_list = [] # the list of customers in the elevator
current_floor = 0 # the current floor of the elevator
up = 1 # moves the elevator up
down = -1 # moves the elevator down

def __init__(self, number_of_floors, register_list):
self.number_of_floors = number_of_floors
self.register_list = register_list

def move(self): # method to move the elevator by 1 floor
pass;

def register_customer(self, customers): # customer goes into elevator
for reg in customers:
self.register_list.append(reg)



def cancel_customer(self, customers): # customer goes out of the elevator
pass;


class Customer:
current_floor = 0 # the current floor of the elevator
destination_floor = 0 # the destination floor of the elevator
customerID = 0 # the customers ID
in_elevator = False # denotes whether customer is in the elevator
finished = False # denotes whether customer has reached the destination floor
customer_direction = 0

def __init__(self, customerID, floors): # initilize Customer class
self.customerID = customerID # assigns self.customerID to customerID
self.current_floor = random.randint(1, floors) # assigns self.current_floor to random int between 1 and floors entered
self.destination_floor = random.randint(1, floors) # assigns seslf.destination_floor to random int between 1 and floors entered
while self.destination_floor == self.current_floor:
self.destination_floor = random.randint(1, floors)
if self.current_floor < self.destination_floor:
self.customer_direction = 1
else:
self.customer_direction = -1

def header(): # elevator animation at beginning of program
print(" ELEVATOR OPENING ")
time.sleep(.2)
print("+++++++++++++++++++++++++++++||+++++++++++++++++++++++++++++++++++")
time.sleep(.2)
print("+++++++++++++++++++++++++| |++++++++++++++++++++++++++++++++")
time.sleep(.2)
print("++++++++++++++++| |+++++++++++++++++++")
time.sleep(.2)
print("++++++| |+++++++++")
time.sleep(.2)
print(" ")
time.sleep(.2)
print(" ELEVATOR CLOSING ")
time.sleep(.2)
print("++++++| |+++++++++")
time.sleep(.2)
print("++++++++++++++++| |+++++++++++++++++++")
time.sleep(.2)
print("+++++++++++++++++++++++++| |++++++++++++++++++++++++++++++++")
time.sleep(.2)
print("+++++++++++++++++++++++++++++||+++++++++++++++++++++++++++++++++++")


def main(): # main method
try: # try/except for user input menu
floors = int(input('Enter the number of floors: ')) # enter floors and assign to floors
customers = int(input('Enter number of customers: ')) # enter customers and assign to customers
building = Building(floors, customers) # instance of building created with inputs of floors and customers # create instance of Building class (building)
except ValueError:
print('YOU DIDNT ENTER A NUMBER. START AGAIN.')
main()


if __name__ == "__main__":
# header()
main()


LINK TO FILE ON GITHUB

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