Create a workout logbook in Python

Here’s a simple but functional Workout Logbook implemented in Python. It allows users to:

• Add workout entries

• View all entries

• Search by date

• Save/load entries from a file

python
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import json
from datetime import datetime

class WorkoutLogbook:
    def __init__(self, filename="workout_log.json"):
        self.filename = filename
        self.entries = []
        self.load_entries()

    def load_entries(self):
        try:
            with open(self.filename, 'r') as file:
                self.entries = json.load(file)
        except FileNotFoundError:
            self.entries = []

    def save_entries(self):
        with open(self.filename, 'w') as file:
            json.dump(self.entries, file, indent=4)

    def add_entry(self, date, exercise, sets, reps, weight):
        entry = {
            "date": date,
            "exercise": exercise,
            "sets": sets,
            "reps": reps,
            "weight": weight
        }
        self.entries.append(entry)
        self.save_entries()
        print("Workout entry added successfully.")

    def view_entries(self):
        if not self.entries:
            print("No workout entries found.")
            return
        for i, entry in enumerate(self.entries, start=1):
            print(f"{i}. Date: {entry['date']} | Exercise: {entry['exercise']} | Sets: {entry['sets']} | Reps: {entry['reps']} | Weight: {entry['weight']} kg")

    def search_by_date(self, date):
        found = [entry for entry in self.entries if entry["date"] == date]
        if not found:
            print(f"No entries found for {date}.")
        else:
            for entry in found:
                print(f"Exercise: {entry['exercise']} | Sets: {entry['sets']} | Reps: {entry['reps']} | Weight: {entry['weight']} kg")


def main():
    logbook = WorkoutLogbook()

    while True:
        print("nWorkout Logbook Menu:")
        print("1. Add Workout Entry")
        print("2. View All Entries")
        print("3. Search by Date")
        print("4. Exit")

        choice = input("Choose an option (1-4): ")

        if choice == '1':
            date = input("Enter date (YYYY-MM-DD): ")
            try:
                datetime.strptime(date, "%Y-%m-%d")  # Validate date format
            except ValueError:
                print("Invalid date format. Please use YYYY-MM-DD.")
                continue
            exercise = input("Enter exercise name: ")
            sets = input("Enter number of sets: ")
            reps = input("Enter number of reps: ")
            weight = input("Enter weight used (kg): ")
            logbook.add_entry(date, exercise, sets, reps, weight)
        elif choice == '2':
            logbook.view_entries()
        elif choice == '3':
            date = input("Enter date to search (YYYY-MM-DD): ")
            logbook.search_by_date(date)
        elif choice == '4':
            print("Exiting Workout Logbook.")
            break
        else:
            print("Invalid choice. Please select from 1 to 4.")

if __name__ == "__main__":
    main()

Features:

• Persistent Storage: Entries are saved in workout_log.json.

• User-Friendly CLI: Menu-based interface.

• Date Validation: Ensures proper date format is used.

You can run this script in any Python environment. The workout log is saved between sessions.