Sir, how to apply range on a single field in a module.
What do you mean by applying a range on a field?
Do you mean a constraint? This can be done by defining a domain on the field.
I also can imagine a min / max value for a “Number” field like integer, float, numeric … e.g.
counter = fields.Integer('Counts', min=0, max=100)
An user can only select a value between 0 and 100.
In this case you can use:
counter = fields.Integer('Counts', domain=[ ('counter', '>=', 0), ('counter', '<=', 100), ])