Python Tuples

Tuples are similar to lists, in that, they can contain an ordered sequence of objects
However, tuples are immutable. Which means, once created, you cannot add or remove items from a tuple.

Creating an empty tuple

An empty tuple can be created by just an empty pair of parens: ()



In [1]:

    
empty_tuple = ()
print empty_tuple

()

You cannot add item to the tuple



In [2]:

    
empty_tuple.append(1)









    



---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-2-8efa2d612532> in <module>()
----> 1 empty_tuple.append(1)

AttributeError: 'tuple' object has no attribute 'append'



In [3]:

    
dir(tuple)









    Out[3]:





['__add__',
 '__class__',
 '__contains__',
 '__delattr__',
 '__doc__',
 '__eq__',
 '__format__',
 '__ge__',
 '__getattribute__',
 '__getitem__',
 '__getnewargs__',
 '__getslice__',
 '__gt__',
 '__hash__',
 '__init__',
 '__iter__',
 '__le__',
 '__len__',
 '__lt__',
 '__mul__',
 '__ne__',
 '__new__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__rmul__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__subclasshook__',
 'count',
 'index']

Creating tuple with values



In [5]:

    
tuple1 = (1, 2, 4)
print tuple1









    



(1, 2, 4)

Reading values from Tuples

Reading values from tuples is similar to that of lists



In [6]:

    
print tuple1[0]



In [7]:

    
print tuple1[-1]

Length of tuple



In [8]:

    
print len(empty_tuple)
print len(tuple1)

0
3

Exercise

Find out advantages of tuples over lists and when to use which?



In [ ]: