Please help confused on how to complete this python program
Project Objectives Use file processing and exception handling. Use string slicing, operations, searching, testing, and manipulation. Use functions, parameter-passing, return values. Use if/elif/... else. Use nesting loops/input validation. Use incremental development to write and test your program. NO GLOBAL VARIABLES ALLOWED. Use proper Python naming conventions: variable_name, function_name Function names must describe what the function does. . O Project Overview Consider a small bank that uses a text file to maintain information about its customers. Each customer record in that master file is stored on one line of the file and contains the following information: Account number (6 characters) Account balance (10 characters) Account holder (remaining characters on the line) There is exactly one space (blank) between the fields. Account numbers range from 100000 to 999998 (inclusive). The account number 999999 is reserved as a sentinel to mark the end of the customer records (the last line of the file contains 999999). Account balances range from 0.00 to 9999999.99 (inclusive). Design, implement and test a Python program that allows the bank to interactively enter transactions and produces a new (updated) master file. Deliverables The deliverable for this assignment is the following file: proj04_LastName.py Provide this information in your project: # Project No.: # Author: # Description: Project Structure 1. The program will prompt the user to enter a file name prefix. That prefix will be used to generate the names of the two files by appending_old.txt and _new.txt" to the prefix. For example, the prefix that you should provide is "customers. The names will be "customers_old.txt" (the old master file) and "customers_new.txt" (the new master file). If the old master file cannot be opened for reading or the new master file cannot be opened for writing, the program will display an appropriate error message and halt. 2. For each customer record in the old master file, the program will: . Display the customer information Prompt the user for any transactions related to that customer and process those transactions Write the customer record to the new master file (unless the account has been closed) The list of valid transactions is given below. The format of the new master file will be the same as the format of the old master file: each customer record will contain the fields specified above, and the last line of the file will contain 999999. 3. The program will recognize the following transaction codes: d-deposit W-withdrawal c-close a - advance to next customer O . For code d, the program will prompt the user for the amount of money to be deposited into the customer's account. That amount will be added to the account balance if the new total does not exceed the upper bound. For code w, the program will prompt the user for the amount of money to be withdrawn from the customer's account. That amount will be subtracted from the account balance if the new total does not exceed the lower bound. For code "c", the program will delete that customer record from the master file, if the account balance is zero. When an account is closed, the program will advance to the next customer in the old master file (N.B. no need to wait for the user to enter code "a" to advance to the next customer). For code a, the program will advance to the next customer in the old master file. If a transaction is not valid, the program will display an appropriate error message and ignore that transaction 4. The program will assume that an existing master file is error-free. 5. The program will detect, report, and recover from all errors related to user inputs. 6. The program will include three functions that help decompose one line of the old master file into three separate items i.e., account number, account balance and the account holder's name. . . def get_number (one_line): given one line of the master file, return the account number def get_balance (one_line): given one line, return the account balance (as a float) def get_name (one_line): given one line, return the account holder's name (as a string) . Project Notes 1. You may not use any collection (such as a list, dictionary, or map) in your program. 2. Be sure to prompt the user for the inputs in the specified order. Also, your program cannot prompt the user for any other inputs. 3. An example master file is given below: 100000 43736.57 Rossum, Guido V. 100789 5681745.99 Eich, Brendan 320056 5.01 Ritchie, Dennis MacAlistair. 650430 2398.12 Wall, Larry 999999 4. An example of a series of user inputs related to the example master file is given below: W 1000.00 W 500.50 d 200.00 a w 5.01 a The new master file resulting from that series of transactions is given below: 100000 42436.07 Rossum, Guido V. 100789 5681745.99 Eich, Brendan 650430 2398.12 Wall, Larry 999999 5. Consider the situation where the user enters a (and only "a") for each customer in the old master file. The new master file which results from that series of transactions is identical (character by character) to the old master file. 6. As noted above, you are required to define and use three functions (get_number (), get_balance (), and get_name()) but you may define and use additional functions if you wish. Input File (customers_old.txt), It is provided on eLearning. 100000 43736.57 Rossum, Guido V. 100789 5681745.99 Eich, Brendan 320056 5.01 Ritchie, Dennis MacAlistair. 650430 2398.12 Wall, Larry 999999 Sample Output/Processing Input/Output Files (use EXACT format - and NO HARDCODING of the data itself; the red colored font is just to show you the user inputs, so please don't worry about font-color) First Sample Output Enter a file prefix: custooomers The file name custooomers_old.txt does not exist Second Sample Output Enter a file prefix: customers Verifying input: 100000 43736.57 Rossum, Guido V. Enter command (a,c,d,w): W Enter withdrawal amount: 1000.00 Enter a command (a,c,d,w): K Entered an invalid command K. Enter a command (a,c,d,w): W Enter withdrawal amount: 500.50 Enter a command (a,c,d,w): d 4 Enter deposit amount: 200.00 Enter a command (a,c,d,w): a New balance: 100000 42436.07 Rossum, Guido V. Verifying input: 100789 5681745.99 Eich, Brendan Enter a command (a,c,d, w): a New balance: 100789 5681745.99 Eich, Brendan Verifying input: 320056 5.01 Ritchie, Dennis MacAlistair. Enter command (a,c,d,w): a W Enter withdrawal amount: 5.00 Enter a command (a,c,d, w): Account not closed because money is still in it. Enter a command (a,c,d, w): W Enter withdrawal amount: 0.01 Enter a command (a,c,d, w): C Account is closed a Enter command (a,c,d, w): New balance: 320056 0.00 Ritchie, Dennis MacAlistair. Verifying input: 650430 2398.12 Wall, Larry Enter a command (a,c,d,w): New balance: 650430 2398.12 Wall, Larry a Output File (customers new.txt) 100000 42436.07 Rossum, Guido V. 1007895681745.99 Eich, Brendan 650430 2398.12 Wall, Larry 999999
