nput: a) ManufacturerList.csv -- contains items listed by row. Each row contains item ID, manufacturer name, item type, and optionally a damaged indicator b) PriceList.csv -- contains items listed by row. Each row contains item ID and the item price. c) ServiceDatesList.csv – contains items listed by row. Each row contains item ID and service date. Required Output: 1) Interactive Inventory Query Capability a. Query the user of an item by asking for manufacturer and item type with a single query. i. Print a message(“No such item in inventory”) if either the manufacturer or the item type are not in the inventory, more that one of either type is submitted or the combination is not in the inventory. Ignore any other words, so “nice Apple computer” is treated the same as “Apple computer”. ii. Print “Your item is:” with the item ID, manufacturer name, item type and price on one line. Do not provide items that are past their service date or damaged. If there is more than one item, provide the most expensive item. iii. Also print “You may, also, consider:” and print information about the same item type from another manufacturer that closes in price to the output item. Only print this if the same item from another manufacturer is in the inventory and is not damaged nor past its service date. iv. After output for one query, query the user again. Allow ‘q’ to quit.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question

You will design a program that manages the inventory of an electronics store. You will need to use a number of concepts that you learned in class including: use of classes, use of dictionaries and input and output of comma delimeted csv files.


Input:
a) ManufacturerList.csv -- contains items listed by row. Each row contains item ID,
manufacturer name, item type, and optionally a damaged indicator
b) PriceList.csv -- contains items listed by row. Each row contains item ID and the item price.
c) ServiceDatesList.csv – contains items listed by row. Each row contains item ID and service
date.


Required Output:
1) Interactive Inventory Query Capability
a. Query the user of an item by asking for manufacturer and item type with a single query.

i. Print a message(“No such item in inventory”) if either the manufacturer or the
item type are not in the inventory, more that one of either type is submitted or
the combination is not in the inventory. Ignore any other words, so “nice Apple
computer” is treated the same as “Apple computer”.

ii. Print “Your item is:” with the item ID, manufacturer name, item type and price
on one line. Do not provide items that are past their service date or damaged. If
there is more than one item, provide the most expensive item.

iii. Also print “You may, also, consider:” and print information about the same item
type from another manufacturer that closes in price to the output item. Only
print this if the same item from another manufacturer is in the inventory and is
not damaged nor past its service date.

iv. After output for one query, query the user again. Allow ‘q’ to quit.

 

This is my code so far but it does not produce any output. Im trying to write the program without the use of PANDAS, LAMBDA, ITEMGETTER or DATABASES



import csv

field_names = ['item_id', 'item_name', 'item_price', 'item_status', 'item_date']


class Inventory:
def __int__(self, item_id, item_name, item_type, item_price, item_status, item_date):
self.id = item_id
self.name = item_name
self.type = item_type
self.price = item_price
self.status = item_status
self.date = item_date


def main():
inventory_list = []

with open('ManufacturerList.csv', 'r') as manufacturer:
m_list = csv.reader(manufacturer)
for each in m_list:
item_id = each[0]
item_name = each[1]
item_type = each[2]
item_status = each[3]
inv_list = Inventory(item_id=item_id, item_name=item_name, item_type=item_type, item_status=item_status)
inventory_list.append(inv_list)

with open('PriceList.csv', 'r') as price:
p_list = csv.reader(price)
for row in p_list:
identifier = row[0]
cost = row[1]
for item1 in inventory_list:
if item1.id == identifier:
item1.price = cost

with open('ServiceDateList.csv', 'r') as service_date:
s_list = csv.reader(service_date)
for row in s_list:
obj = row[0]
serviced = row[1]
for item2 in inventory_list:
if item2.id == obj:
item2.serviced = serviced

def sort1(x):
return x.name

inventory_list.sort(key=sort1)
with open('FullInventory.csv', 'w')as file:
writer = csv.writer(file)
for each in inventory_list:
row = [each.id, each.name, each.type, each.price, each.date, each.status]
writer.writerow(row)

def sort2(x):
return x.id

inventory_list.sort(reverse=True, key=sort2)
with open('LaptopInventory.csv', 'w')as file:
writer = csv.writer(file)
for each in inventory_list:
row = [each.id, each.name, each.type, each.price, each.date, each.status]
writer.writerow(row)

def sort3(x):
return x.date

inventory_list.sort(key=sort3)
with open('PastServiceDateInventory.csv', 'w')as file:
writer = csv.writer(file)
for each in inventory_list:
if each.date != '#####':
row = [each.id, each.name, each.type, each.price, each.date, each.status]
writer.writerow(row)

def sort4(x):
return x.status

inventory_list.sort(key=sort4)
with open('DamagedInventory.csv', 'w')as file:
writer = csv.writer(file)
for each in inventory_list:
if each.status == 'damaged':
row = [each.id, each.name, each.type, each.price, each.date, each.status]
writer.writerow(row)

if __name__ == '__main__':
main()

 

 

Required Output:
1) Interactive Inventory Query Capability
a. Query the user of an item by asking for manufacturer and item type with a single query.
Print a message("No such item in inventory") if either the manufacturer or the
item type are not in the inventory, more that one of either type is submitted or
i.
the combination is not in the inventory. Ignore any other words, so "nice Apple
computer" is treated the same as "Apple computer".
ii. Print "Your item is:" with the item ID, manufacturer name, item type and price
on one line. Do not provide items that are past their service date or damaged. If
there is more than one item, provide the most expensive item.
iii. Also print "You may, also, consider:" and print information about the same item
type from another manufacturer that closes in price to the output item. Only
Transcribed Image Text:Required Output: 1) Interactive Inventory Query Capability a. Query the user of an item by asking for manufacturer and item type with a single query. Print a message("No such item in inventory") if either the manufacturer or the item type are not in the inventory, more that one of either type is submitted or i. the combination is not in the inventory. Ignore any other words, so "nice Apple computer" is treated the same as "Apple computer". ii. Print "Your item is:" with the item ID, manufacturer name, item type and price on one line. Do not provide items that are past their service date or damaged. If there is more than one item, provide the most expensive item. iii. Also print "You may, also, consider:" and print information about the same item type from another manufacturer that closes in price to the output item. Only
You will design a program that manages the inventory of an electronics store. You will need to use a
number of concepts that you learned in class including: use of classes, use of dictionaries and input and
output of comma delimeted csv files.
Input:
a) ManufacturerList.csv
contains items listed by row. Each row contains item ID,
manufacturer name, item type, and optionally a damaged indicator
b) PriceList.csv -- contains items listed by row. Each row contains item ID and the item price.
items listed by row. Each row contains item ID and service
c)
ServiceDatesList.csv-contains
date.
Transcribed Image Text:You will design a program that manages the inventory of an electronics store. You will need to use a number of concepts that you learned in class including: use of classes, use of dictionaries and input and output of comma delimeted csv files. Input: a) ManufacturerList.csv contains items listed by row. Each row contains item ID, manufacturer name, item type, and optionally a damaged indicator b) PriceList.csv -- contains items listed by row. Each row contains item ID and the item price. items listed by row. Each row contains item ID and service c) ServiceDatesList.csv-contains date.
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