code: def send_button(recipient):
      
      page.send(recipient, Template.Buttons("hello", [
          Template.ButtonWeb("Open Web URL", "https://www.oculus.com/en-us/rift/"),
          Template.ButtonPostBack("trigger Postback", "DEVELOPED_DEFINED_PAYLOAD"),
          Template.ButtonPhoneNumber("Call Phone Number", "+16505551234")
      ]))
docs: Shortcuts are supported
      page.send(recipient, Template.Buttons("hello", [
          {'type': 'web_url', 'title': 'Open Web URL', 'value': 'https://www.oculus.com/en-us/rift/'},
          {'type': 'postback', 'title': 'tigger Postback', 'value': 'DEVELOPED_DEFINED_PAYLOAD'},
          {'type': 'phone_number', 'title': 'Call Phone Number', 'value': '+16505551234'},
      ]))