Help with Python expressions.
You have to insert valid Python code block that stores at some moment a float/integer value of the quantity to invoice in the variable 'result'.
You can use these variables to compute your formula:
- env: Environment variable for getting other models.
- context: Current context dictionary.
- user: Current user.
- line: Contract recurring invoice line that triggers this formula.
- contract: Contract whose line belongs to.
- invoice: Invoice (header) being created.
Example of Python code
result = env['product.product'].search_count([('sale_ok', '=', True)])