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→Tuple
==== List ====
==== List ====
==== Tuple ====
==== Tuple ====
Inmutable, declared by ()
* My_tuple = (3, 2, 1)
You can iterate trough tuples.<br />
You can also refer to the items of a tuple like in a list.<br />
<source lang="python">
My_tuple[0]
3</source><br />
They support multple assignment, usefull for example to iterate trough dictionaries:<br />
<source lang="python">
d = dict()
d['steve'] = 2
d['susan'] = 4
for (k, v) in d.items():
print k, v
</source>
Tuples are comparable. They compare the leftmost first, then the next and so on...<br />
<source lang="python">
>>> (0, 1, 2) < (5, 1, 2)
True
>>> (0, 1, 30000000) < (0, 3, 1)
True
</source>
This can be used to sort dictionaries by keys.
<source lang="python">
>>> d = {'c':22, 'b':1, 'a':10}
>>> t = d.items()
>>> t
[('c', 22), ('b',1), ('a', 10)]
>>> t.sort()
>>> t
[('a', 10), ('b',1), ('c', 22)]
==== Dictionary ====
==== Dictionary ====
Key - Value pairs. They are called diferent in diferent languages:<br />
Key - Value pairs. They are called diferent in diferent languages:<br />