Update main.py

main.py

@@ -7,7 +7,7 @@ import tempfile
 import requests
 import json
 import pandas as pd
-import numpy as np
+import numpy as np # Added for np.nan
 from datetime import datetime, timedelta # Import timedelta for daily refresh logic
 from flask import Flask, request, jsonify, send_file
 from flask_cors import CORS, cross_origin
@@ -579,7 +579,8 @@ def parse_table(html, table_id=None):
         return pd.DataFrame()
 
     try:
-        return pd.read_html(tbl_html)[0]
+        # FIX 1: Wrap tbl_html in io.StringIO
+        return pd.read_html(io.StringIO(tbl_html))[0]
     except ValueError:
         logging.warning("No tables found in the provided HTML string for parsing.")
         return pd.DataFrame()
@@ -704,6 +705,9 @@ def _scrape_team_stats_bs(year):
         if col not in non_numeric_cols:
             df[col] = pd.to_numeric(df[col], errors="coerce")
 
+    # FIX 2: Replace NaN values with None for JSON compliance
+    df = df.replace({np.nan: None})
+
     return df
 
 # BRScraper Data Fetching Utilities (for players)
@@ -815,7 +819,7 @@ def ask_perp(prompt, system="You are a helpful NBA analyst AI.", max_tokens=500,
         return "Perplexity API key is not configured."
     hdr = {'Authorization':f'Bearer {PERP_KEY}','Content-Type':'application/json'}
     payload = {
-        "model":"sonar-medium-online",
+        "model":"sonar-pro", # do not change
         "messages":[{"role":"system","content":system},{"role":"user","content":prompt}],
         "max_tokens":max_tokens, "temperature":temp
     }