kodingwindow@kw:~$ python3
...
>>> from array import *
>>> arr = array("s", ["", "", ""])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: bad typecode (must be b, B, u, h, H, i, I, l, L, q, Q, f or d)

>>> arr = array("i", [40, 96, 24, 55, 78, -111])
>>> arr
array('i', [40, 96, 24, 55, 78, -111])
>>> arr[0]
40

>>> len(arr)
6

>>> max(arr)
96

>>> min(arr)
-111

>>> arr.itemsize    # memory size of an element stored in the array
4

>>> arr.typecode
'i'
>>> for i in arr:
...     print(i)
... 
40
96
24
55
78
-111
>>> arr = array("u", ['x', 'y', 'z'])
>>> arr
array('u', 'xyz')

>>> arr[0]
'x'

>>> for ch in arr:
...     print(ch)
... 
x
y
z

>>> arr1 = array("i", [40, 96, 24, 55, 78, -111])
>>> arr2 = array("d", [3.14, 9.84])
>>> arr1
array('i', [40, 96, 24, 55, 78, -111])

>>> arr1.append(-111)
>>> arr1
array('i', [40, 96, 24, 55, 78, -111, -111])

>>> arr1.count(-111)
2

>>> arr1.extend(arr2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can only extend with array of same kind

>>> arr2 = array("i", [314, 984])
>>> arr1.extend(arr2)
>>> arr1
array('i', [40, 96, 24, 55, 78, -111, -111, 314, 984])

>>> arr1.index(-111)
5

>>> arr2.insert(0, 169)
>>> arr2
array('i', [169, 314, 984])

>>> arr2.reverse()
>>> arr2
array('i', [984, 314, 169])

>>> arr2.pop()
169

>>> arr2.pop(0)
984

>>> arr2
array('i', [314])

>>> arr1
array('i', [40, 96, 24, 55, 78, -111, -111, 314, 984])

>>> arr1.remove(-111)
>>> arr1
array('i', [40, 96, 24, 55, 78, -111, 314, 984])

>>> arr1.tolist()
[40, 96, 24, 55, 78, -111, 314, 984]