hello Waseem ,

Thankyou for the reply, I am unable to comment on your answer, due to less karma. I wanted to know can I create an xml email template and use it through python code. 

I have created a template, Don't know how to include it in python code.

Here is my template.

```xml

<odoo>

 <data noupdate ="1">

  <record id="email_template" model="mail.template">

   <field name="name">Attendance Reminder Email</field>

   <field name="model_id" ref="hr.model_hr_employee"/>

   <field name="auto_delete" eval="True"/>

   <field name="email_from">${(object.company_id.email}</field>

   <field name="email_to">${object.work_email}</field>

   <field name="subject">Attendance Reminder ${object.name}</field>

   <field name="body_html">

    <![CDATA[

    Hello ${object.name},<br/>

     This is reminder that you didn't sign out today.<br/>

     Best regards...<br/>]]>

   </field>

  </record>

 </data>

</odoo>

```

The first thing that you need to add mail dependency in your manifest file. 

'depends': ['mail'],

and add mail.thread to _inherit as below:

_inherit = ['mail.thread']

and add the below code to check_for_incomplete_attendances method:

template_obj = self.env['mail.mail']
template_data = {
                'subject': 'Due Invoice Notification : ' + current_date,
                'body_html': message_body,
                'email_from': sender,
                'email_to': ", ".join(recipients)
                }
template_id = template_obj.create(template_data)
template_obj.send(template_id)

In above code, you will create mail template by code and then fill all required data like subject,body_html,...etc.