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The Python List

The list is the basic type of “container” object in Python:

x = [1,2,3]
type(x)

list

y = ["a", "b", "c"]
type(y)

list

z = [True, False, False, True]
type(z)

list

We can access list elements using square brackets. Note that the first entry is indexed at 0:

y[1]

'b'

y[0]

'a'

A Python list does not have to have elements all of one type:

v = [True, 0, "whatever",[1,2]]
type(v[2])
%timeit sum(x)

37.7 ns ± 0.0464 ns per loop (mean ± std. dev. of 7 runs, 10,000,000 loops each)