how to append a output of tuple in list code example

Example 1: how to add number in tuple

a = ('2',)
b = 'z'
new = a + (b,)

Example 2: how to append a tuple to a list

a_list = []
a_list.append((1, 2))       # Succeed! Tuple (1, 2) is appended to a_list
a_list.append(tuple(3, 4))  # Error message: ValueError: expecting Array or iterable