Update app.py

app.py

@@ -0,0 +1,18 @@
+from flask import Flask, request, render_template
+
+app = Flask(__name__)
+
+def greet(name, intensity):
+    return "Hello, " + name + "!" * int(intensity)
+
+@app.route("/", methods=["GET", "POST"])
+def home():
+    message = ""
+    if request.method == "POST":
+        name = request.form["name"]
+        intensity = request.form["intensity"]
+        message = greet(name, intensity)
+    return render_template("index.html", message=message)
+
+if __name__ == "__main__":
+    app.run(debug=True)