Hello,

In Odoo, JSON fields are used to store structured data in JSON format. To read and write data to a JSON field in Python, you can use the following approach:

1.Reading data from a JSON field:

   # Assuming you have a model called 'my.model' with a JSON field called 'json_field'

   record = self.env['my.model'].browse(record_id)

   json_data = record.json_field  # This will return a dictionary

2. Writing data to a JSON field:

   # Assuming you have a model called 'my.model' with a JSON field called 'json_field'

   record = self.env['my.model'].browse(record_id)

   # Update the JSON field with new data

   record.json_field = {'key': 'value', 'key2': 'value2'}

Hope it helps.