I am fairly new to PyArrow and Arrow, so I may ask something stupid. I have read the documentation of the field() method, and as far as I understand I can say that a filed does not allow NULL values by specifying nullable=False. So, I have tried this example:

schema = pyarrow.schema(fields=[
    pyarrow.field(name='unique_id', type=pyarrow.uint64(), nullable=False),
    pyarrow.field(name='age', type=pyarrow.uint8(), nullable=True),
    pyarrow.field(name='favourite_colours', type=pyarrow.list_(pyarrow.string()), nullable=True)
])
data = [
    [1, None, 3],
    [10, None, 30],
    [None, ['red', 'blue'], ['green']]
]
table = pyarrow.table(data=data, schema=schema)
print(table)

I declare the field unique_id as nullable=False, and therefore I was expecting some sort of error when building the pyarrow.table, where I pass data with a NULL value for unique_id ([1, None, 3] in the code example).

Am I doing something wrong?
Thank you!

p.s. using pyarrow 17.0.0 with Python 3.8.16