Changing value in dictionary, stored in SQLite database (Flask Python)

I have a Flask application that is using SQLite database. I have created this model to load data into the db

class Category(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    products = db.Column(db.Text)

This database has been populated with a lot of information, and I am trying to change a specific variable in a dictionary within the stored information.

# print 'products' for the first Category stored

x = Category.query.all()
xLoaded = json.loads(x[0].products)
print(xLoaded)

# output
[['test1', {'path': ['a', 'b', 'c']}], ['test2', {'path': ['d', 'e', 'f']}]]

Specifically, I am trying to change 'b' in 'test1' so I tried this:

x = Category.query.all()
xLoaded = json.loads(x[0].products)
xLoaded[0][1]['path'][1] = 'z'

db.session.commit()

However, this fails to change anything.

>Solution :

The code only changes the value of the variable xLoaded not the x.

Change the value of variable x

x = Category.query.all()
xLoaded = json.loads(x[0].products)
xLoaded[0][1]['path'][1] = 'z'
x[0].products = xLoaded

db.session.commit()