Tuple

Initialise

>>> empty = ()
>>> singleton = 'hello',    # <-- note trailing comma
>>> names = ('peter', 'alison', 'barry', 'martin')

Append (creates a new tuple)

>>> d = (1, 2, 3, 4)
>>> e = 5,
>>> d = d + e
>>> d
(1, 2, 3, 4, 5)

Get

>>> names = 'peter', 'alison', 'barry', 'martin',
>>> names
('peter', 'alison', 'barry', 'martin')
>>> names[1]
'alison'

Convert

List to tuple:

>>> sports = ['football', 'cricket']
>>> tuple(sports)
('football', 'cricket')

Tuple to list:

In [1]: sports = ('football', 'cricket')

In [2]: list(sports)
Out[2]: ['football', 'cricket']

Tuple to a dictionary:

>>> t = ((0, 'Green'), (1, 'Red'))
>>> dict(t)
{0: 'Green', 1: 'Red'}

zip

Built-in Functions

returns a list of tuples, where the i-th tuple contains the i-th element from each of the argument sequences or iterables.

Sample

>>> keys = (10, 20, 30, 40)
>>> values = ('Ten', 'Twenty', 'Thirty', 'Forty')
>>> d = zip(keys, values)
>>> d
[(10, 'Ten'), (20, 'Twenty'), (30, 'Thirty'), (40, 'Forty')]
>>> d = dict(zip(keys, values))
>>> d
{10: 'Ten', 20: 'Twenty', 30: 'Thirty', 40: 'Forty'}