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Python

Program for processing input files in the format of receipts.

Table of contents

General Information

computeSales.py reads .txt files, makes correctness check, and can print requested statistics.

Text format: 

------------------- 
AFM:AAAAAAAA 
PRODUCT_NAME: QUANTITY UNIT_PRICE TOTAL_VALUE 
... 
PRODUCT_NAME: QUANTITY UNIT_PRICE TOTAL_VALUE 
TOTAL: TOTAL VALUE 
-------------------- 
AFM:AAAAAAAB 
PRODUCT_NAME: QUANTITY UNIT_PRICE TOTAL_VALUE 
... 
PRODUCT_NAME: QUANTITY UNIT_PRICE TOTAL_VALUE 
TOTAL: TOTAL VALUE 
--------------------

A sample of a good receipt

--------------------------
ΑΦΜ: 0123456789
ΧΩΡΙΑΤΙΚΗ: 2   5.50    11.00
ΚΡΕΑΤΑ:   4   12.25    49.00
ΚΡΑΣΙ:    2   3.50      7.00
ΣΥΝΟΛΟ: 67.00
--------------------------
ΑΦΜ: 0123456780
ΧΩΡΙΑΤΙΚΗ: 2   2.00    4.00
ΚΡΕΑΤΑ:   4   12.00    48.00
ΣΥΝΟΛΟ: 52.00
--------------------------

Features

.TXT files 1:

  1. 1 or more receipts in file(but at least 1)
  2. Begins/Ends with lines containing the ‘-’ character.
  3. Separated by lines containing the ‘-’ character.
  4. First line contains the AFM number(10-digit number).
  5. Last line contains the total purchases.
  6. There can be receipts of different companies (AFM).
  7. Receipts of multiple products (1 or more).
  8. Reappearance of a product in a receipt. 2
  9. No problem with space characters in receipts
  10. Error in receipt => receipt ignored => file preserved

Program

Prints the following user menu repeatedly3:

  1. Read input file4.
  2. Print statistics for a specific product.
  3. Print statistics for a specific AFM.

How to run

  • In Linux
  1. Refresh repository lists
$ sudo apt update
$ sudo apt install software-properties-common
$ sudo add-apt-repository ppa:deadsnakes/ppa
$ sudo apt update
  1. Install latest versions of python
$ sudo apt-get install python3.8
  1. Verify installation and compile
$ python3.8
$ python3.8 computeSales.py
  • In any python IDE
  1. Install Python packages from website
 https://www.python.org/downloads/

and choose version 5

  1. Install Pycharm (or any Python Platform you are familiar with)
  2. Import project to PyCharm workspace
  3. Make sure you have python interpreter detected (or install it)
  4. Run your computeSales.py

Footnotes

  1. Every input file satisfies constraints about numerical values and format it sustains. ↩

  2. In the proof, the product XORIATIKI may appear again later in the same proof. ↩

  3. There must be data in order to be able to be read (or input files). ↩

  4. The program works for a non-specific archive length. ↩

  5. Make sure you include python version as PATH variable. Select it on installation process ↩