<!-- Dropdown -->
<li class="nav-item dropdown">
  <a class="nav-link dropdown-toggle" href="#" id="navbardrop" data-toggle="dropdown">
    Beer
  </a>
  <div class="dropdown-menu">
    <a class="dropdown-item" href="{{ url_for('indianBeer') }}">Indian Beer</a>
    <a class="dropdown-item" href="#">Imported Beer</a>

  </div>
</li>

from flask import Flask, request, url_for, redirect

app = Flask(__name__)





@app.route("/")
def main():
    return render_template('new_index.html')


@app.route('/indian_beer1',methods=['GET','POST'])
def indianBeer():
    if request.method == 'POST':
        return redirect(url_for('new_index.html'))

    return render_template('indian_beer1.html')


if __name__ == "__main__":
    app.run(debug=True)