import numpy as np
lst = np.array([['a', 'c', 'd'], ['u', 'v', 'w', 'x'], [1, 2, 3, 4]])
print(lst)
print(lst[0])
print(lst[1])
print(lst[2])
print(lst[0][0])
print(lst[1][2])
'''
run:
[list(['a', 'c', 'd']) list(['u', 'v', 'w', 'x']) list([1, 2, 3, 4])]
['a', 'c', 'd']
['u', 'v', 'w', 'x']
[1, 2, 3, 4]
a
w
'''