Diploma of IT - Web Development
Coder Academy
Welcome to my Python project developed to showcase my knowledge and skills on Python Programming at Coder Academy. This is part of Term 1 assignment by developing terminal application.
The name of my app is "Pregnancy Tracker".
This application was inspired by my wife's pregnancy journey, as she was 9 weeks pregnant when I initially submitted the idea for approval.
The purpose of this app is to provide helpful information related to pregnancy such as calculating the gestational age, estimate due date, countdown until due date and many more. Please refer to the Features section below for details.
You can find the Github repository for my terminal app in https://github.com/jmcaluyafuentes/terminal-app-T1A3.
Upon running the app, the console displays something like the below image as a preview of the application.
You can find the Trello board for my terminal app in https://trello.com/b/qk7qA75c/t1a3-terminal-app.
Below is a snapshot of my Trello board during the initial stage of my terminal app development:
Below is a snapshot of the final stage:
The Trello board tool is very useful in organizing tasks, tracking progress, and managing the development process of my terminal app.
- Languages: Python 3 for the application logic and bash script for system-level interactions.
- Project Type: Terminal application designed to run in a command-line interface (CLI).
- IDE: Visual Studio Code (VS Code) used for writing code and debugging.
- Version Control: Git for version and source control.
- Repository Hosting: GitHub for hosting the Git repository remotely.
- Package Manager: pip for managing Python packages and dependencies.
- Operating System Compatibility: Developed for Microsoft Windows operating systems, utilizing the Windows Subsystem for Linux (WSL) for Linux compatibility.
- PEP8 Styling - guide and styling convention for writing code
- PEP257 Styling - guide and styling convention for writing docstring
- sys: Provides access to system-specific parameters and functions.
- textwrap: Offers convenient text wrapping and filling functionality.
- datetime: Supports date and time manipulation and formatting.
- csv: Facilitates reading and writing CSV (Comma-Separated Values) files.
- Colorama (version 0.4.6): Provides cross-platform colored terminal text.
- Emoji (version 2.11.1): Allows easy usage of emoji characters in Python.
- Pytest (version 8.2.0): A testing framework for Python projects.
- exceptiongroup (version 1.2.1)
- iniconfig (version 2.0.0)
- packaging (version 24.0)
- pluggy (version 1.5.0)
- tomli (version 2.0.1)
- Make sure you have the latest version of Windows 10 or later.
- Enable the Windows Subsystem for Linux (WSL) on your Windows system.
Install Windows 10 into your laptop or desktop. Check the latest version here https://learn.microsoft.com/en-us/windows/release-health/.
Install Windows Terminal from Microsoft Store here https://apps.microsoft.com/detail/9n0dx20hk701?rtc=1&hl=en-au&gl=AU.
"Windows Subsystem For Linux (WSL) is a technology built into Windows that allows running a Linux operating system within it's own environment or container, side-by-side with Windows. This gives us the best of both worlds. (source: Coder Academy)"
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Go to https://learn.microsoft.com/en-us/windows/wsl/install.
Pre-requisite: You must be running Windows 10 version 2004 and higher.
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Install WSL command
"Open PowerShell or Windows Command Prompt in administrator mode by right-clicking and selecting "Run as administrator", enter the wsl --install command, then restart your machine. (source: Microsoft)"
In Powershell:
wsl --install -
Check the version of your Ubuntu
lsb_release -rs
Guide is available here https://learn.microsoft.com/en-us/windows/python/web-frameworks#install-python-pip-and-venv.
"Ubuntu 18.04 LTS comes with Python 3.6 already installed, but it does not come with some of the modules that you may expect to get with other Python installations. We will still need to install pip, the standard package manager for Python, and venv, the standard module used to create and manage lightweight virtual environments. (source: Microsoft)"
Search 'Ubuntu' and click to open the terminal.
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Confirm if you already have Python3 by typing the command below and hit enter.
python3 --versionThis should return your Python version number such as 3.12.10
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Update your version in Python
If you need to update your version of Python, first update your Ubuntu version by entering:
sudo apt update && sudo apt upgradeThen update Python using:
sudo apt upgrade python3
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Enter the command below.
sudo apt install python3-pip -
Pip allows you to install and manage additional packages that are not part of the Python standard library.
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Open your Ubuntu terminal
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Check your current directory
pwd -
Navigate to the directory where you want to install the Pregnancy Tracker app.
cd ./path-to-your-folderReplace the 'path-to-your-folder' with the actual path of your directory.
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Copy and paste below command into your terminal
git clone git@github.com:jmcaluyafuentes/terminal-app-T1A3.git
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Navigate to the project directory
cd terminal-app-T1A3 -
Change the permission of the script file run_app.sh
chmod +x run_app.sh -
Run the application by typing this command
./run_app.sh-
This command will automatically install a virtual environment into your selected directory so that all packages in this app will not be installed to the global environment.
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The command also automatically installs all dependencies (i.e., third-party packages) necessary to run the app as intended.
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Lastly, the command will run the application.
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To exit the app at anytime, type "QUIT" (case-insensitive) and press enter.
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Alternatively, you can use the 'CTRL + C' in your keyboard.
Input: Date of last menstrual period entered by the user
Outputs:
a. Number of Weeks Pregnant: Calculates and displays the number of weeks pregnant based on the input date.
b. Trimester Information: Indicates whether the user is in her 1st, 2nd, or 3rd trimester of pregnancy.
c. Estimated Due Date: Provides an estimated due date based on the input date.
d. Countdown: Displays a countdown (in weeks and days) from current date to the estimated due date.
Please take note that every time you enter a command, hit enter so that the app can execute the command.
Select 1 for Pregnancy Information:
Enter the date of last menstrual period:
Then the app will display the pregnancy information:
Select 2 to go back to main menu.
In the early stage of development, this feature was previously named 'Precaution'.
However, I realized that the appropriate title is "Safety Information" because it encompasses a broader scope of ensuring the well-being and health safety of the pregnant user.
From the main menu, select 2 for Safety Information:
Input: Specific food item (e.g., Grapes) entered by the user
Output:
Determines whether the food is "Safe to Eat", "Not Safe to Eat" or other information relevant to food safety.
Select 1 for Food Safety:
Enter the food:
The app will display the food safety information:
Select 2 to go back to Safety Information menu.
Input: Planned travel date and last menstrual period date entered by the user.
Outputs:
a. Estimated Weeks Pregnant on Travel Date: Calculates and displays the estimated number of weeks pregnant on the planned travel date.
b. Safety Advice: Provides tailored advice related to the planned travel, such as: Whether it's safe to travel internationally. Recommendations such as obtaining a medical certificate or precautions at airport security. Activity Safety This feature ensures that the user is aware of safe and appropriate activities during pregnancy.
Select 2 for the Travel Safety:
Enter the last date of menstrual period:
Enter the planned travel date:
Select from the given questions related to travel safety:
The app will display the travel safety information related to the question you selected:
Select 2 to go back to Safety Information menu.
Input: User-generated personal notes (e.g., milestone events, feelings).
Outputs:
a. Recording Notes: Notes are saved to a file, including the current date and time of entry.
b. Confirmation Message: The app confirms successful addition of the note to the file.
c. Viewing Recorded Notes: Users can view all past notes, providing a log of their pregnancy journey.
Select 3 for the note-taking:
Select 1 to write your personal notes:
Now, write your notes:
The app will confirm the note was successfully recorded:
Select 2 to go back to one menu up.
Then, select 2 to read your recorded note:
The app will display your recorded notes.
- You can enter "INSTRUCTIONS" (case-insensitive) at any time in order to display the instructions. Enter "CLOSE" (case-insensitive) to close the instruction page.
The app will then display the instructions.
- You can enter "QUIT" (case-insensitive) at any time to exit the app.
If invalid selection number is entered, the app will display an error.
If invalid date or format is entered, the app will display an error.
If the last menstrual period date is greater than the current date, the app will display an error.
If travel date is less than the current date, the app will display an error.
If safety information of food entered is not available, the app will display an error.
If there is no file found if the user selected to read her notes, the app will display an error. This happens if the user did not write any notes yet while trying to read the file.
The date entered by the user is tested if valid using the pytest package.
while True:
# Give user options based on the features of this app
print(dedent('''
Select from the following features.\n
1. Pregnancy Information
2. Safety Information
3. Take Down Notes
'''))
# Prompt the user of her choice
user_choice = input('Enter your choice (1, 2 or 3): ')
# Check if user want to view the instructions or exits the app
instructions = guide_user_response(user_choice)
while not instructions:
# Check what option the user selected
if user_choice == '1':
# Display pregnancy information based on user input
pregnancy_information()
display_guide_on_top() # From print_guide module
elif user_choice == '2':
# Display safety information based on user input
safety_info()
display_guide_on_top() # From print_guide module
elif user_choice == '3':
# Record user's personal notes
note_taking()
display_guide_on_top() # From print_guide module
else:
# Display the guide for instructions and for quitting the app
display_guide_on_top() # From print_guide module
# Inform the user if she entered invalid choice
print(Fore.RED + emoji.emojize(f':cross_mark: ERROR: "{user_choice}" is an invalid choice. Please enter 1, 2 or 3.') + Style.RESET_ALL)
instructions = True
# Exit the app if there are keyboard interrupt done by the user such 'Ctrl + C'
except KeyboardInterrupt:
print('\n' * 200)
print(Fore.RED + emoji.emojize('\n:cross_mark: ERROR: Keyboard interrupt received.\n') + Style.RESET_ALL)
print(Fore.GREEN + 'Thank you for using the Pregnancy Tracker app. Goodbye!\n' + Style.RESET_ALL)
sys.exit(1)This loop runs indefinitely until explicitly terminated by a keyboard interrupt (Ctrl + C).
The program displays a menu of features for the user to choose from.
It prompts the user to enter their choice (1, 2, or 3) via the input function.
The program calls the guide_user_response function to check if the user wants to view instructions or exit the app.
This loop executes as long as the instructions flag is False, indicating normal feature selection.
Depending on the user's choice (1, 2, or 3), the program executes different functions:
If user_choice is '1', it displays pregnancy information after calling the pregnancy_information() function.
If user_choice is '2', it displays safety information after calling the safety_info() function.
If user_choice is '3', it allows the user to take personal notes by calling the note_taking() function.
If the user enters an invalid choice (i.e., not '1', '2', or '3'), it displays an error message.
The program then exits the inner loop by setting instructions to True.
The program handles a KeyboardInterrupt exception (Ctrl + C) by displaying an error message and exiting gracefully.
def pregnancy_information() -> None:
"""
Calculate and display the information about pregnancy such as gestational age
in weeks, trimester, estimated due date (EDD) and countdown until EDD.
"""
while True:
# Prompt the user to enter the date of her last menstrual period
last_period_date = get_last_period_date()
# Calculate gestational age in weeks
gestational_age, trimester, due_date, weeks_remaining, days_remaining = calc_pregnancy_info(last_period_date)
# Display the guide for instructions and for quitting the app
display_guide_on_top() # From print_guide module
# Display relevant information about the pregnancy
print(Fore.YELLOW + emoji.emojize(dedent(f'''
Pregnancy Information:\n
You are {gestational_age} weeks pregnant :baby: \n
Trimester: {trimester}
Estimated Due Date: {due_date.strftime('%d/%m/%Y')}
Due Date Countdown: {weeks_remaining} week(s) and {days_remaining} days.
''') + Style.RESET_ALL))
# Prompt user what she wants to do next
if not get_user_next_action(): # From user_next_action module
# Display the guide for instructions and for quitting the app
display_guide_on_top() # From print_guide module
break # Return to main menu based on user choiceThe function starts by calling get_last_period_date() to prompt the user to enter the date of her last menstrual period and obtain the last_period_date as a datetime.date object.
It then calls calc_pregnancy_info function to compute essential pregnancy information based on the last_period_date. This function calculates:
- gestational_age: The number of weeks since the last menstrual period.
- trimester: Determines whether the pregnancy is in the first, second, or third trimester based on gestational_age.
- due_date: Estimated due date (EDD) based on the last_period_date.
- weeks_remaining and days_remaining: Countdown until the estimated due date (due_date).
The function then displays the calculated pregnancy information using formatted text and emojis, including:
- gestational_age in weeks.
- trimester.
- due_date in DD/MM/YYYY format.
- Countdown (weeks_remaining and days_remaining) until the estimated due date.
After displaying the pregnancy information, it prompts the user for the next action using get_user_next_action().
If the user chooses to return to the main menu (by not taking any further action), the function breaks out of the loop and returns control to the main menu.
def get_last_period_date() -> date:
"""
Prompt user to enter the last menstrual period date and parse the input for validation.
Returns:
date: The parsed date object representing the last menstrual period date.
"""
# Display the guide for instructions and for quitting the app
display_guide_on_top() # From print_guide module
while True:
# Prompt user to enter the date of her last menstrual period
user_input = input('\nEnter the date of your last menstrual period (DD/MM/YYYY): ')
# Check if user want to view the instructions or exits the app
instructions = guide_user_response(user_input)
while not instructions:
try:
# Convert user input string into datetime.date object in DD/MM/YYYY format
last_period_date = datetime.strptime(user_input, '%d/%m/%Y').date()
# Get current date
current_date = date.today()
# Check if last_period_date is before the current date
if last_period_date < current_date:
return last_period_date
else:
# Display the guide for instructions and for quitting the app
display_guide_on_top() # From print_guide module
# Display error message for invalid input date
print(Fore.RED + emoji.emojize(dedent(f'''
:cross_mark: ERROR: The last menstrual period date {last_period_date} must be before the current date.
''')) + Style.RESET_ALL)
instructions = True
except ValueError:
# Display the guide for instructions and for quitting the app
display_guide_on_top() # From print_guide module
# Handles error gracefully if user entered invalid date format
print(Fore.RED + emoji.emojize(dedent(f'''
:cross_mark: ERROR: "{user_input}" is an invalid format.
Please enter the date in DD/MM/YYYY.'''
)) + Style.RESET_ALL)
instructions = TrueThe function starts by displaying a guide for the user and prompts them to enter the date of their last menstrual period (DD/MM/YYYY format) using the input() function.
The function enters a loop (while True) to continuously prompt the user for input until a valid date is provided.
Inside the loop, it attempts to convert the user's input string into a datetime.date object using datetime.strptime().
If the conversion succeeds (try block), it checks if the parsed last_period_date is before the current date (date.today()). If valid, it returns the parsed date.
If the input format is invalid or cannot be parsed (except ValueError block), it displays an error message and continues to prompt the user for a valid input.
The instructions flag controls whether to continue prompting the user (while not instructions) or allow the user to exit or view instructions based on their input.
If there's an error parsing the date or the date is invalid, appropriate error messages are displayed using colored text.
The Royal Women's Hospital, Victoria Australia. "Food Safety During Pregnancy." Available at: https://thewomens.r.worldssl.net/images/uploads/fact-sheets/Food-safety-during-pregnancy.pdf
The Alphabetizer. "List of fruits and vegetables." Available at: https://alphabetizer.flap.tv/lists/list-of-fruits-and-vegetables.php
Better Health Channel. "Pregnancy and travel." Available at: https://www.betterhealth.vic.gov.au/health/healthyliving/pregnancy-and-travel
Greater Than. "10 Fun Activities for Pregnant Moms for All Stages of Your Pregnancy." Available at: https://drinkgt.com/blogs/news/activities-for-pregnant-moms
David Anson. Markdown lint MD007 - Unordered list indentation. Available at: https://github.com/DavidAnson/markdownlint/blob/v0.34.0/doc/md007.md
Colorama (version 0.4.6) package in 'pypi.org'. Available at: https://pypi.org/project/colorama/
Emoji (version 2.11.1) package in 'pypi.org'. Available at: https://pypi.org/project/emoji/
Pytest (version 8.2.0) package in 'pypi.org'. Available at: https://pypi.org/project/pytest/
Microsoft Website. How to install Linux on Windows with WSL. Available at: https://learn.microsoft.com/en-us/windows/wsl/install
Microsoft website. Get started using Python for web development on Windows. Available at: https://learn.microsoft.com/en-us/windows/python/web-frameworks#install-python-pip-and-venv