main_list = [[(np.array([111, 111]), np.array([121, 121])), (np.array([112,
    112]), np.array([122, 122])), (np.array([131, 131]), np.array([141, 141
    ])), (np.array([132, 132]), np.array([142, 142]))], [(np.array([211, 
    211]), np.array([221, 221])), (np.array([212, 212]), np.array([222, 222
    ])), (np.array([231, 231]), np.array([241, 241])), (np.array([232, 232]
    ), np.array([242, 242]))]]
zip(*main_list)
Python: transform a list of lists of tuples