Generate random numbers with two constraints (sum and local maximum) in Python

I have a dataframe where I want to create random numbers in a new column. The random numbers must fulfill two constraints:

1. The random numbers must add up to a specified sum (in the example, the sum is 300)
2. For each observation, the random numbers must not exceed a value in the constraint column.

In the example below, the constraints are fulfilled because the sum is 300 and the random number does not exceed the constraint column.

Example:

GEOID	CONSTRAINT	RANDOM
010010000001	100	80
010010000002	50	40
010010000003	75	60
010010000004	75	60
010010000005	100	60

It seems having random numbers totaling a sum has been demonstrated but I do not see an example with a second constraint.