Python - Tuple

Tuple are similar to List but the data inside the Tuple cannot be changed once created.  Un like List this is a immutable Object. Similarly as List the elements in Tuple can be accessed using indexing.

A Tuple can be created using,

days = ("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday")

And a Single Item Tuple can be created using

>>> st = (1,)  

>>> st

(1,)

Some More examples of Tuple are

# empty tuple

my_tuple = ()

# tuple having integers

my_tuple = (1, 2, 3)

# tuple with mixed datatypes

my_tuple = (1, "Hello", 3.4)

# nested tuple

my_tuple = ("mouse", [8, 4, 6], (1, 2, 3))

# tuple can be created without parentheses

# also called tuple packing

my_tuple = 3, 4.6, "dog"

# tuple unpacking is also possible

a, b, c = my_tuple

Tuple repitition which is like the following.

print (1, 2) * 4       

Tuples can be heterogeneous and they can be created using,

t = (0,1,"two",3.0, "four", (5, 6))

Accessing - A Tuple can be accessed similarly as List using the Indexing as,

>>>tup1 = (1, 2, 3, 4, 5, 6, 7 );

>>> print "tup1[0]: ", tup1[0]

Deletion – Since a Tuple is an immutable Type , the Tuple elements cannot be deleted. To delete a entire Tuple we can use,

tup = ('physics', 'chemistry', 1997, 2000);

del tup;

All Other Operations Like Concatenation, Repetition are allowed on The Tuple like List

Unpacking – a Tuple can be unpacked into several values and can be assigned as

>>> v = ("x","y","z")

>>> (a,b,c) = v

>>> print a

x

>>> print b

y

>>> print c

Z

Comparing - Multiple Tuples can be compared as

Compare two tuples

>>> print (4,2) < (3,5)

False

>>> print (2,4) == (2,4)

True