Upload app.py

app.py

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+import pandas as pd
+import numpy as np
+from dotenv import load_dotenv
+
+from langchain.schema import Document
+from langchain_huggingface import HuggingFaceEmbeddings
+from langchain_chroma import Chroma
+
+import gradio as gr
+
+load_dotenv()
+
+books = pd.read_csv("books_with_emotions.csv")
+books["large_thumbnail"] = books["thumbnail"] + "&fife=w800"
+books["large_thumbnail"] = np.where(
+    books["large_thumbnail"].isna(),
+    "cover-not-found.jpg",
+    books["large_thumbnail"],
+)
+
+# Create documents directly from DataFrame instead of loading from file
+documents = []
+for _, row in books.iterrows():
+    content = f"{row['isbn13']} {row['description']}"
+    documents.append(Document(page_content=content))
+
+# Create the vector database using HuggingFace embeddings
+embeddings = HuggingFaceEmbeddings(model_name="all-MiniLM-L6-v2")
+db_books = Chroma.from_documents(documents, embeddings)
+
+
+def retrieve_semantic_recommendations(
+        query: str,
+        category: str = None,
+        tone: str = None,
+        initial_top_k: int = 50,
+        final_top_k: int = 16,
+) -> pd.DataFrame:
+
+    recs = db_books.similarity_search(query, k=initial_top_k)
+    books_list = [int(float(rec.page_content.strip('"').split()[0])) for rec in recs]
+    book_recs = books[books["isbn13"].isin(books_list)].head(initial_top_k)
+
+    if category != "All":
+        book_recs = book_recs[book_recs["simple_categories"] == category].head(final_top_k)
+    else:
+        book_recs = book_recs.head(final_top_k)
+
+    # Only sort by emotion if the columns exist
+    if tone == "Happy" and "joy" in book_recs.columns:
+        book_recs = book_recs.sort_values(by="joy", ascending=False)
+    elif tone == "Surprising" and "surprise" in book_recs.columns:
+        book_recs = book_recs.sort_values(by="surprise", ascending=False)
+    elif tone == "Angry" and "anger" in book_recs.columns:
+        book_recs = book_recs.sort_values(by="anger", ascending=False)
+    elif tone == "Suspenseful" and "fear" in book_recs.columns:
+        book_recs = book_recs.sort_values(by="fear", ascending=False)
+    elif tone == "Sad" and "sadness" in book_recs.columns:
+        book_recs = book_recs.sort_values(by="sadness", ascending=False)
+
+    return book_recs
+
+
+def recommend_books(
+        query: str,
+        category: str,
+        tone: str
+):
+    recommendations = retrieve_semantic_recommendations(query, category, tone)
+    results = []
+
+    for _, row in recommendations.iterrows():
+        description = row["description"]
+        truncated_desc_split = description.split()
+        truncated_description = " ".join(truncated_desc_split[:30]) + "..."
+
+        authors_split = row["authors"].split(";")
+        if len(authors_split) == 2:
+            authors_str = f"{authors_split[0]} and {authors_split[1]}"
+        elif len(authors_split) > 2:
+            authors_str = f"{', '.join(authors_split[:-1])}, and {authors_split[-1]}"
+        else:
+            authors_str = row["authors"]
+
+        caption = f"{row['title']} by {authors_str}: {truncated_description}"
+        results.append((row["large_thumbnail"], caption))
+    return results
+
+# Fix: Filter out NaN values before sorting
+categories = ["All"] + sorted(books["simple_categories"].dropna().unique())
+
+# Only include emotion tones if the emotion columns exist
+emotion_columns = ["joy", "surprise", "anger", "fear", "sadness"]
+emotion_labels = ["Happy", "Surprising", "Angry", "Suspenseful", "Sad"]
+available_emotions = [label for col, label in zip(emotion_columns, emotion_labels) if col in books.columns]
+tones = ["All"] + available_emotions
+
+with gr.Blocks(theme = gr.themes.Glass()) as dashboard:
+    gr.Markdown("# Semantic book recommender")
+
+    with gr.Row():
+        user_query = gr.Textbox(label = "Please enter a description of a book:",
+                                placeholder = "e.g., A story about forgiveness")
+        category_dropdown = gr.Dropdown(choices = categories, label = "Select a category:", value = "All")
+        tone_dropdown = gr.Dropdown(choices = tones, label = "Select an emotional tone:", value = "All")
+        submit_button = gr.Button("Find recommendations")
+
+    gr.Markdown("## Recommendations")
+    output = gr.Gallery(label = "Recommended books", columns = 8, rows = 2)
+
+    submit_button.click(fn = recommend_books,
+                        inputs = [user_query, category_dropdown, tone_dropdown],
+                        outputs = output)
+
+
+if __name__ == "__main__":
+    dashboard.launch()