Build an idea ranker based on votes

Here’s a simple and functional idea ranker based on votes, implemented in Python. This ranker allows users to add ideas, upvote or downvote them, and displays a ranked list sorted by vote count.

python
CopyEdit
class Idea:
    def __init__(self, description):
        self.description = description
        self.votes = 0

    def upvote(self):
        self.votes += 1

    def downvote(self):
        self.votes -= 1

    def __str__(self):
        return f"{self.description} (Votes: {self.votes})"

class IdeaRanker:
    def __init__(self):
        self.ideas = {}

    def add_idea(self, key, description):
        if key in self.ideas:
            print("Idea key already exists.")
        else:
            self.ideas[key] = Idea(description)

    def vote(self, key, up=True):
        if key not in self.ideas:
            print("Idea not found.")
            return
        if up:
            self.ideas[key].upvote()
        else:
            self.ideas[key].downvote()

    def ranked_ideas(self):
        return sorted(self.ideas.items(), key=lambda item: item[1].votes, reverse=True)

    def show_ranked_ideas(self):
        ranked = self.ranked_ideas()
        for rank, (key, idea) in enumerate(ranked, start=1):
            print(f"{rank}. {idea}")

# Example usage:
if __name__ == "__main__":
    ranker = IdeaRanker()
    ranker.add_idea("idea1", "Create a mobile app for food delivery")
    ranker.add_idea("idea2", "Build a decentralized social network")
    ranker.add_idea("idea3", "Launch an online coding bootcamp")

    # Voting
    ranker.vote("idea1", up=True)
    ranker.vote("idea1", up=True)
    ranker.vote("idea2", up=True)
    ranker.vote("idea3", up=False)

    # Display ranked ideas
    ranker.show_ranked_ideas()

Features:

• add_idea(key, description): Adds a new idea with a unique key.

• vote(key, up=True): Allows upvoting or downvoting an idea.

• show_ranked_ideas(): Displays the list of ideas ranked by votes.

You can adapt this further into a web app using Flask or Django, or turn it into an interactive command-line tool. Let me know if you’d like the ranker implemented in another language or framework (like JavaScript, React, or a Google Sheets formula).