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Group Assignment
TECHNOLOGY PARK MALAYSIA
PYTHON PROGRAMMING
Table of Contents
INTRODUCTION AND ASSUMPTIONS ............................................................................................... 2 INTRODUCTION ................................................................................................................................. 2 ASSUMPTIONS .................................................................................................................................... 3 DESIGN OF THE PROGRAM ................................................................................................................ 4 PSEUDOCODE ..................................................................................................................................... 4 SCREENSHOTS OF SAMPLE INPUT/OUTPUT AND EXPLANATIONS ...................................... 51 STUDENT 1 - ADMINISTRATOR 1 ................................................................................................. 51 STUDENT 2 – ADMINISTRATOR 2 ................................................................................................. 59 STUDENT 3 - OPERATOR 1 ............................................................................................................. 67 STUDENT 4 - OPERATOR 2 ............................................................................................................. 76 CONCLUSION ........................................................................................................................................ 84 REFERENCES ........................................................................................................................................ 85
INTRODUCTION AND ASSUMPTIONS
INTRODUCTION
Our group's collective work resulted in the development of a dynamic Python application targeted at modernizing billing methods in the field of package delivery services. This new application is a critical tool, allowing customers to deliver several items to various locations inside a consolidated consignment. This application painstakingly computes the correct cost for each unique parcel using a meticulously built price table that takes into account various weights and destination zones, assuring accuracy and transparency in the billing process. This multifaceted program is designed to offer a comprehensive array of functionalities, notably including the seamless entry and management of client information, the precise computation of parcel costs aligned with the established pricing table, the streamlined generation of consignment bills, and the facilitation of a systematic review process for generated bills. Notably, the system is meticulously structured to accommodate two distinctive user roles, each endowed with specialized functionalities tailored to their specific responsibilities within the parcel delivery service framework. The Administrator role boasts privileged access, enabling the management of critical system components, while the Operator role facilitates the execution of essential operational tasks necessary for smooth consignment handling and billing procedures. By implementing this program, our group aims to significantly enhance the operational efficiency and accuracy within the parcel delivery business sphere. This initiative not only embodies the fusion of our collective expertise in Python programming but also underscores our commitment to innovating and optimizing systems crucial to modern logistics operations.
DESIGN OF THE PROGRAM
PSEUDOCODE
ADMINISTRATOR 1
START
Set users to an empty list. Define admin_login(username, password) function. Set admin_usernames = [‘admin1987avoger1’, ‘admindarkmattervenus’] Set admin_passwords = [‘z2Qv0GW6(%P’ , ‘2251f4dKQ]}Z’] Return True If (username, password) = admin_usernames and admin_passwords. Else Return False END_IF END Function Define operator_login(username, password) function Set operator_usernames = [‘operatorinsideputnix’, ‘operatorcityofgodfly’] Set operator_passwords = [‘036_XNZipSI’, ‘d8Xt3J1SC&v9’]
Return True If (username, password) = operator_usernames and operator_passwords. Else Return False END_IF END Function Define add_user(username, password) function For each user in users If user[‘username’] = ‘username’ Print” User already exists.” Return END_IF END_FOR Create a new dictionary with keys ‘username’, ‘password’ and ‘role’ set to ‘operator’. Append the new user to users. Call save_to_file( ) function Print” User has been added as an operator.” END Function Define delete_user(username) function. For user in users
Define remove_administrator_role(username) function. For user in users If user[‘username’] = ‘username’ and user[‘role’] = ‘administrator’ Set user[‘role’] = ‘operator’ Call save_to_file( ) function Print” User has been set to operator role.” Return Else: Print” User not found or it is not an administrator.” END_IF END_FOR END Function Define view_users(role=None) function. If role = None Print” List of all users:” For user in users Print” {user[‘username’]}. {user[‘role’]} Elif role = ‘operator’ Print“ List of all operators” For user in users If user[‘role’] = ‘operator’
Print” {user[‘username’]}. {user[‘role’]}” END_IF Elif role = ‘administrator’ Print” List of all administrators.” For user in users If user[‘role’] = ‘administrator’ Print” {user[‘username’]}. {user[‘role’]}” END_IF Elif role = ‘all’ Print” List of all users.” For user in users Print” {user[‘username’]}. {user[‘role’]}” Else: Print” No users found in role ‘{role}’ or invalid role provided. END_IF END Function Define save_user_to_file( ) function Open user_operators.txt file in write mode. For each user in users, Write user[‘username’], user[‘password’] and user[‘role’] to the file. Close the file. END Function
Write the first element of the row to the file. For each column in the row Write a ‘,’ and the column value to the file. END_FOR Write a newline character. END_FOR For each row in table, If row is not empty, Write row to the file For each col in row, Write ',' followed by col to the file END_FOR Write a newline character to the file END_IF ENF_FOR END Function Define load_data_from_file( ) function Process try Initialize loaded_prices as an empty list Open prices.data.txt file in read mode.
If file exists Read each line from the file. For each line Append the list of values to loaded_prices Return loaded prices. Elif an exception occurs during file reading or data processing, Print” Error occurred while loading data.” Return an empty list. Elif loaded data is empty, Initialize table_content with default data for prices. Else: Return an empty list. END_IF END Function
Loading data from the file or initializing if it's not loaded
Load table_content from load_data_from_file() function If not table content table_content = [ ["Destination", "Weight below 1kg", "Weight in between 1kg to 3kg", "Weight more than 3kg"], ["Zone A", "RM8.00", "RM16.00", ""], ["Zone B", "RM9.00", "RM18.00", ""],
If zone != valid_zones Print” Invalid zone. Please enter a valid zone (A, B, C, D, E)” Else: Break END_IF END While WHILE True DO TRY INPUT price IF price < 0 THEN OUTPUT "Price cannot be negative. Please enter a non- negative price." ELSE BREAK END_IF CATCH ValueError DO OUTPUT "Invalid input. Please enter a valid numeric price." END_TRY END_WHILE For row in table If row corresponds to the entered zone and the price column is empty
Print” Price for this zone already exists. Return table. END_IF END_FOR For row in table If row corresponds to the entered zones and the price column is not empty Print” Price added.” Return table. END_IF END_FOR END Function Define modifying_price(table) function Print” Please note that you may only delete the price of parcels more than 3KG.” Define valid_zones = [“A”, “B”, “C”, “D”, “E”] While TRUE: Input zone and convert it into upper case. Input zone to update (A, B, C, D, E). If zone != valid_zones Print” Invalid zones. Please enter a valid zone. (A, B, C, D, E) Else:
Print” Price updated!” END_FOR END Function Define delete_price(table) Print” Please note that you may only delete the price of parcels more than 3KG.” Defines valid_zones = [‘A’, ‘B’, ‘C’, ‘D’, ‘E’] While TRUE: Input zone and convert it into upper case. Enter zone to delete (A, B, C, D, E). If != valid_zones Print” Invalid zone entered. Please enter a valid zone.” Else: Break END While For row in table If the row corresponds to the entered zone Set the price column to empty. Call save_table_data_to_file(table) function. Print “Price deleted!” Return
END_IF
END_FOR
END Function Define checking_price(table) Input zone. Enter zone to check price. Input weight. Enter weight to check price. For row in table If row = zone If weight < 1 print” Price for ‘weight’ kg parcel to ‘zone’: ‘row’” Return Elif 1<= weight <= 3 Print” Price for ‘weight’ kg parcel to ‘zone’: ‘row’” Return Else: Print” Price for ‘weight’ kg parcel to ‘zone’: ‘row’” Return END_IF END_FOR END Function
Print"2. Modify Price of Parcel" Print"3. Delete Price of Parcel" Print"4. Check Price of Parcel" Print"5. View Prices for All Parcels" Print"6. Exit" Input choice. If choice == 1: Set table_content = adding_price_above_3kg(table_content) function Call save_table_data_to_file(table_content) function Elif choice == 2: Call modifying_price(table_content) function Call save_table_data_to_file(table_content) function Elif choice == 3: Call delete_price(table_content) function Call save_table_data_to_file(table_content) function Elif choice == 4: Call checking_price(table_content) function Elif choice == 5: Call view_all_prices() function Elif choice == 6: Call save_table_data_to_file(table_content) function
Print “Bye!" Return Else: Print “Invalid choice. Please choose a number between 1 and 6." END_IF END While Define operators( ) function Define load_data_from_file( ) funtion Process try Initialize loaded_prices as an empty list Open prices_data.txt file in read mode. If file exists Read each line from the file. For each line Remove leading/trailing whitespaces and split by “,” to create a list of values. Append the list of values to loaded_prices. Return loaded_prices Elif an exception occurs during file reading or data processing Print” Error occurred while loading data.” Else: Return an empty list. END_IF
