Create app.py

app.py

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+import gradio as gr
+import matplotlib.pyplot as plt
+import requests
+import os
+import datetime
+import random
+import time
+
+# Set the base currency (USD) and available cryptocurrencies
+base_currency = "USD"
+cryptos = ["BTC", "ETH", "XMR", "ETC", "RVN", "KAS", "DOGE", "LTC"]
+colors = ["red", "blue", "green", "orange", "purple", "yellow", "gold", "aqua", "fuchsia", "chartreuse", "coral", "maroon", "olive"]
+
+# Retrieve API key from environment variables
+api_key = os.getenv("CRYPTOCOMPARE_API_KEY")
+
+def fetch_crypto_data(crypto):
+    """Fetches historical price data for the selected cryptocurrency."""
+    crypto_prices = []
+    crypto_dates = []
+    current_timestamp = int(time.time())
+    end_date = current_timestamp
+    limit = 365  # Max limit per API call
+    total_data_points = 0
+
+    while total_data_points < limit:
+        url = f"https://min-api.cryptocompare.com/data/v2/histoday?fsym={crypto}&tsym={base_currency}&limit={limit}&toTs={end_date}&api_key={api_key}"
+        response = requests.get(url)
+        data = response.json()
+
+        if "Data" not in data or "Data" not in data["Data"]:
+            return "Error fetching data. Please check API key and limits."
+
+        data_points = len(data["Data"]["Data"])
+        total_data_points += data_points
+        crypto_prices += [x["close"] for x in data["Data"]["Data"]]
+        crypto_dates += [x["time"] for x in data["Data"]["Data"]]
+        end_date = data["Data"]["Data"][-1]["time"] - 86400
+
+    crypto_dates = [datetime.datetime.fromtimestamp(x).strftime("%Y-%m-%d") for x in crypto_dates]
+    return crypto_dates, crypto_prices
+
+
+def plot_crypto_price(crypto):
+    """Plots the historical price data for the selected cryptocurrency."""
+    crypto_dates, crypto_prices = fetch_crypto_data(crypto)
+    
+    if isinstance(crypto_dates, str):
+        return crypto_dates  # Return error message
+
+    plt.figure(figsize=(12, 6))
+    plt.xticks(ticks=range(0, len(crypto_dates), 7), labels=crypto_dates[::7], rotation=90)
+    color = random.choice(colors)
+    plt.plot(crypto_dates, crypto_prices, label=crypto, color=color)
+    plt.fill_between(crypto_dates, crypto_prices, alpha=0.5, color=color)
+    plt.xlabel("Date")
+    plt.ylabel("Price (USD)")
+    plt.title(f"{crypto} Price History")
+    plt.legend()
+    plt.grid()
+    
+    plt.savefig("crypto_plot.png")
+    return "crypto_plot.png"
+
+# Create Gradio Interface
+demo = gr.Interface(
+    fn=plot_crypto_price,
+    inputs=gr.Dropdown(choices=cryptos, label="Select Cryptocurrency"),
+    outputs=gr.Image(type="file", label="Price Chart"),
+    title="Cryptocurrency Price Visualization",
+    description="Select a cryptocurrency to view its historical price data over the past year."
+)
+
+if __name__ == "__main__":
+    demo.launch()