Bank cards are issued to clients of ABC Bank to enter into transactions on their accounts. A new type of card that they issue has a card number which consists of sixteen digits that are unique to each card issued. The card number is compiled in such a way that certain basic information is encoded
Bank cards are issued to clients of ABC Bank to
enter into transactions on their accounts. A new type
of card that they issue has a card number which
consists of sixteen digits that are unique to each
card issued. The card number is compiled in such a
way that certain basic information is encoded
therein by grouping certain digits.
The composition of a card number is as follows:
Card number composition
0 3 1 9 2 1 1 1 1 0 0 8 2 3 6 8
T E A
Where:
T – Type
E – Expiry date
A – Account number
The first four digits (T) represent the card type and
issue year in the format
TTYY
where T is the type (see Table 3.1) and Y is the year,
so in the example is 0319 = Diner's club, issued in
2019.
The following four digits (E) indicate the card's
expiry date in the format
YYMM
Where Y is the year and M is the Month of the year,
so in the example 2111 = 2021, 11th month.
The last eight digits (A) indicate the card's account
number. The series representing the account
number starts with 1 or 0:
0XXXXXXX – Debit account
1XXXXXXX – Credit account
so, in the example 10082368 = Credit account.
Now write a Python program that can read a list of
card numbers from a text file and analyse the
card numbers to extract the encoded data as shown
above for each number. The decoded data must be
written to a text file.
See Figures 3.1 and 3.2 for example output.
Questions 3.1-3.4 must be completed, in order, in
one Python file to create a complete, working
program.
Question 3.1 [10]
Write a function, ReadFile(), that reads the contents
of a text file and stores it in a list. The text file,
Data.txt, is provided and its content is presented in
Table 3.2.
The Data.txt file is saved under “K:\Data.txt”. Make
a backup of the file before the file is accessed by the
program.
Each line in the text file consists of one card
number.
The function receives one parameter: A string list for
where each individual entry from the text file must
be stored. The list is passed by reference to the
function.
The function returns the number of lines that were
read from the text file to the calling statement. If the
file cannot be read, an error message should be
displayed, and the program should close without
any further execution.
NB! – If the function in Question 3.1 does not
function correctly, a list may be explicitly created in
the main program as if the function has read the
contents from the file. This list is to be used in the
following questions
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