The Python code is evaluated in a restricted context, where the following objects are available to use:

• env: This is a reference for the Environment object, just like self.env in a
  class method.
• model: This is a reference to the model class the server action acts upon. In our example, it is equivalent to self.env['project.task].
• Warning: This is a reference to openerp.exceptions.Warning, allowing for validations that block unintended actions. It can be used as raise Warning('Message!').
• record or records: This provides references to the current record or records, allowing you to access their field values and methods.
• log: This is a function to log messages in the ir.logging model, allowing for database side logging on actions.
• datetime, dateutil, and time: These provide access to the Python libraries.