Analysis of balanced, unbalanced, sinusoidal and nonsinusoidal three-phase systems through a Python developed tool Tekijä Serna-Montoya, León Felipe, Suárez-Ramírez, Juan Pablo, Ramírez-Gil, Manuel, Muñoz-Galeano, Nicolás, Cano-Quintero, Juan Bernardo, López-Lezama, Jesús María