Working version

app.py

@@ -1,7 +1,56 @@
 import gradio as gr
+import requests
+import pandas as pd
+import plotly.express as px
 
-def greet(name):
-    return "Hello " + name + "!!"
+class DownloadsTracker:
+    def __init__(self):
+        self.all_packages = {}
+    
+    def fetch_if_needed(self, packages):
+        errors = []
+        for pkg in packages:
+            if pkg not in self.all_packages:
+                try:
+                    response = requests.get(f"https://pypistats.org/api/packages/{pkg}/overall")
+                    if response.status_code != 200:
+                        errors.append(f"Package not found: {pkg}")
+                        continue
+                    
+                    data = response.json()["data"]
+                    df = pd.DataFrame([
+                        {"date": d["date"], "downloads": d["downloads"]} 
+                        for d in data if d["category"] == "without_mirrors"
+                    ])
+                    df["date"] = pd.to_datetime(df["date"])
+                    df = df.sort_values("date")
+                    df["cumulative_downloads"] = df["downloads"].cumsum()
+                    self.all_packages[pkg] = df
+                except:
+                    errors.append(f"Error fetching {pkg}")
+        if len(errors) > 0:
+            return "\n".join(errors)
+        return None
 
-demo = gr.Interface(fn=greet, inputs="text", outputs="text")
-demo.launch()
+    def plot(self, package_list):
+        package_list = [p.strip() for p in package_list.split(",") if p.strip()]
+        errors = self.fetch_if_needed(package_list)
+        
+        fig = px.line(title="Cumulative Package Downloads")
+        for pkg in package_list:
+            if pkg in self.all_packages:
+                df = self.all_packages[pkg]
+                fig.add_scatter(x=df["date"], y=df["cumulative_downloads"], name=pkg)
+
+        return fig, errors
+
+tracker = DownloadsTracker()
+
+with gr.Blocks() as app:
+    packages = gr.Textbox("transformers", label="Package names (comma-separated)")
+    error_box = gr.Textbox(label="Errors:", interactive=False)
+    render_btn = gr.Button("Render")
+    plot = gr.Plot()
+    render_btn.click(tracker.plot, inputs=[packages], outputs=[plot, error_box])
+
+app.launch()

requirements.txt

@@ -0,0 +1,2 @@
+pandas
+plotly