Problem with Table Valued Parameter SQL server and Python Pyodbc

I've created a test table, then a Type Table and then a SP:

CREATE TABLE prueba (

    id int IDENTITY,
    datos varchar (20),
    nums NUMERIC (10,2)
    CONSTRAINT PK_PRUEBA PRIMARY KEY (id)
)

CREATE TYPE dbo.pruebatable AS TABLE (

    datos varchar (20),
    nums NUMERIC (10,2)
)

CREATE PROC spruebatable
@test pruebatable READONLY
AS
BEGIN
INSERT INTO prueba (datos,nums)
SELECT 
datos, nums
FROM @test

END;

And in python, I'm trying to calls this with a private connection function that works fine:

from haegpi import sqlconn

cursor = sqlconn()

var = ('int',1)
sql = "{CALL spruebatable (?)}"
cursor.execute (sql,var)

I've tried to send it as tuple, list and result is the same. Any clues?