A GUI user form with Tkinter that uses Regex to validate the user inputs. Also, it saves the records in a database to be able to log in and see the user information.
Project for the second-semester course "Programming Languages" (ST0244) taught at EAFIT University by prof Edison Valencia.
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🔍 Checks valid syntax of user inputs, according to certain parameters.
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🧬 Analyzes the expressions with a regex process.
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🗝 Saves your information in a database, to be accessed for you at any time with your username and password.
The main aim of this project was to use regular expressions in a useful situation and go further with the project, creating something user-friendly with a GUI.
In other words, learn how to use the Python Regex Library (re) and one of the Python GUI libraries (Tkinter).
Note: Please read the Input Instructions.
In the following documentation, we specified, some questions proposed by the prof for the presentation of this and how to use correctly the program.
Project Questions
1. What was the chosen programming language and why?
The chosen programming language was Python. The reasons why it was chosen
were essentially based on the large number of tools provided by a high-level
language such as Python, because in the case of reading regular expressions,
the library "re” located in the Python standard libraries module was very
helpful when interpreting patterns in String expressions or phrases. In
addition, the library provides an approach and allows to understand in a
great way the operation of a regular expression and the behavior of reading
the characters when carrying out the compilation work. In this same sense,
Python is a language that allows the programmer to work very efficiently
with String type data, since actions such as slicing, concatenation,
conversion and iteration of text strings become a much clearer and more
concise task taking into account the variety of functions that Python
provides to modify strings. On the other hand, this language also has many
possibilities when it comes to implementing Graphic User Interfaces (GUI),
since the idea of carrying out a graphic part within the project was
explored so that it would be reflected, in a way more familiar to the user,
the importance and daily use of regular expressions; therefore, having
worked with this language allowed executing the visual scope of the project
and linking the interface with the logical part of the program.
2. What is your general opinion of the chosen programming language?
From our perspective, we believe that the chosen language represents a large
number of benefits and learning within the development of a project, since
it adapts appropriately to the needs of the programmer and users, and offers
a wide variety of options when executing an action, such as being able to
offer different programming paradigms when choosing a coding style where the
most strengthened is the imperative paradigm, followed by object-oriented
programming and certain part of functional programming; along the same
lines, we consider that Python is a very ordered and concise language that
allows ideas to be illustrated with the support of various libraries,
functions and applications integrated or compatible with Python, for example
in the field of data analysis, databases, etc. Likewise, we consider that
Python is a very versatile language when it comes to developing applications
or user interfaces, this is reflected, for example, in applications such as
Netflix and Spotify whose main programming language is Python.
3. What is your appreciation of the way of input and output of data in this programming language?
Taking into account that within the project we worked with regular
expressions, it was necessary to be able to interact with the user so that
an expression could be read and interpreted. For this, the input() function
was used, which is part of the Python language by default and its function
is based on receiving data on the screen, stopping the reading flow until
the user enters certain information. We consider that this data collection
is very convenient in terms of the needs of developers since it is a
function that already comes with the Python package, compared to Java, for
example, where a function as essential as requesting data by keyboard must
be done by importing the module "java.util.Scanner" where this same Scanner
must be initialized for its use. Due to the above, data entry in Python is
quick and simplified with the input() function whose value it will receive
by default will be a string type, which is ideal when working with text
strings, as it was in the case of this project. On the other hand, in the
data output there is the print() function, which is a tool with a large
number of features that allow you to modify the output values in a more
profitable way, because with print(), actions such as formatting strings or
String Interpolation, printing several lines of text, the specification of
parameters that print() receives, are activities that over time have evolved
and become more comfortable to use when programming, which makes the screen
output more accurate.
4. How is the handling of data types and data structures in this programming language?
Regarding data handling, Python is a very flexible interpreted language
since it is dynamically typed and allows the management of different types
of data within the same block of code, for example, in functions, which can
receive as a parameter and return different types of data. Likewise, Python
offers different tools when working with large data flows and for this
reason it is very popular in the field of data science and big data
management. Regarding data structures, Python is a language that allows easy
understanding of the use of data structures and different algorithms due to
its syntactic simplicity, as the programmer seeks to focus more on the
operation of the given data structure/algorithm and not worry so much about
the format or basic structure of the code. In addition to the above, Python
is a language that has a wide variety of collections and libraries that
allow working with different data structures such as stacks and queues, as
well as data structures such as linked lists and trees can be observed with
object-oriented programming, which facilitates the execution of data
analysis projects that, for example, must be added to complex data
structures.
We used the Python Regex Library (re) to analyze the expressions according to certain patterns, created from Regular Expressions theory.
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username: Must have a minimum length of 8 characters and a maximum of 16 characters. -
name: Must contain only letters in upper or lower case. -
email: Must contain characters as letters or numbers, followed of an@and finally a correct subdomain.hello@gmail.com -
Date of Birth: You can enter your birth date in the following formats:- 10/10/2015 (dd/mm/yyyy) - 10-10-2015 (dd-mm-yyyy) - 10 NOV 2010 (dd [English Abbreviation for Month] yyyy) - 10 NOVIEMBRE 2010 (dd [Spanish Month] yyyy)You must be 18 years or older in order to create an account
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Credit Card: The credit card number must be only American Express, Visa or Mastercard. TheExpDatemust have one of the following formats (mm/yy) or (mm--yy). And the CVV must contain 3 digits. -
Password: The password to be accpeted, must have at least, upper and lower case letters, special symbols and a length of 8 characters. Remember the special symbols allowed are the following:--> '$' '@' '_' '*' '!' '¡' '-' '#'
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The database is a
.txtfile, the data contained there is not protected. See Contribute. -
The program has some bugs that are not solved because of its complexity and the time of development of the project. See Contribute.
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Take into account to create your development environment to run correctly the program. This program is not compiled.
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Save your credetials in a Password Manager to access your information. At the moment, the program has not a Password Recovery system.
We designed the project to be able to run either on a GUI or your terminal.
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Clone the project on your machine.
git clone git@github.com:alejoriosm04/regex-validate-gui-userform.git
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Go to the project directory (or wherever you stored it).
cd regex-validate-gui-userform/src/ -
Install the dependencies using
pippip install -r requirements.txt
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Run the program.
python3 main.py
If you have problems running the GUI program with Tkinter, you will be able to use the user form in your terminal. At the moment, the CLI program is not linked with the database.
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Go to the project directory (or wherever you stored it).
cd regex-validate-gui-userform/cli/ -
Run the program.
python3 main.py
Since this is the authors' coursework, we will not review pull requests. However, this project can be used as a basis for developing new features.
Authors in the future might add new features like link the program to a MongoDB Database in the cloud, add new features and solve some bugs.
Lina Ballesteros and Alejandro Ríos developed the entire program.
Copyright (c) 2022, Lina Sofia Ballesteros Merchan, Alejandro Rios Muñoz. All rights reserved.