Convert element of list to integer(Two dimentional array)

[Larz60+]

Or you could use the following which will allow mixed numbers and strings:

>>> mylist = ['1', '4', '6', '8', 'hello', '7']
>>> newlist = [int(item) if item.isdigit() else item for item in mylist]
>>> newlist
[1, 4, 6, 8, 'hello', 7]
>>>