Question

I get NameError: name 'array' is not defined in python error when I want to create array, for example:

a = array([1,8,3])

What am I doing wrong? How to use arrays?

Answer 1

If you need a container to hold a bunch of things, then lists might be your best bet:

a = [1,8,3]

Type

dir([])

from a Python interpreter to see the methods that lists support, such as append, pop, reverse, and sort.
Lists also support list comprehensions and Python’s iterable interface:

for x in a:
    print x

y = [x ** 2 for x in a]