Programa de Python para seleccionar la lista de listas de formularios de valores aleatorios

Dada una lista de listas. La tarea es extraer un elemento aleatorio de él.

Ejemplos:

Input : test_list = [[4, 5, 5], [2, 7, 4], [8, 6, 3]]
Output : 7
Explanation : Random number extracted from Matrix.

Input : test_list = [[4, 5, 5], [2, 7, 4], [8, 6, 3]], r_no = 2
Output : 6
Explanation : Random number extracted from 2nd row from Matrix.

Método #1: Usar chain.from_iterable() + random.choice()

En esto, aplanamos Matrix a la lista usando from_iterable() y choice() se usa para obtener un número aleatorio de la lista.

# Python3 code to demonstrate working of
# Random Matrix Element
# Using chain.from_iterables() + random.choice()
from itertools import chain
import random
  
# initializing list
test_list = [[4, 5, 5], [2, 7, 4], [8, 6, 3]]
  
# printing original list
print("The original list is : " + str(test_list))
  
# choice() for random number, from_iterables for flattening
res = random.choice(list(chain.from_iterable(test_list)))
  
# printing result
print("Random number from Matrix : " + str(res))

The original list is : [[4, 5, 5], [2, 7, 4], [8, 6, 3]]
Random number from Matrix : 6

Método n. ° 2: usar la opción() para obtener el elemento de una fila en particular

Si se menciona una fila, se puede usar el método choice() para obtener elementos aleatorios de esa fila.

# Python3 code to demonstrate working of
# Random Matrix Element
# Using random.choice() [if row number given]
import random
  
# initializing list
test_list = [[4, 5, 5], [2, 7, 4], [8, 6, 3]]
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing Row number
r_no = 1
  
# choice() for random number, from_iterables for flattening
res = random.choice(test_list[r_no])
  
# printing result
print("Random number from Matrix Row : " + str(res))

The original list is : [[4, 5, 5], [2, 7, 4], [8, 6, 3]]
Random number from Matrix Row : 7