Tuple
A tuple is a collection which is ordered and unchangeable. In Python tuples are written with round brackets.
Example
Create a Tuple:
thistuple = ("apple", "banana", "cherry")
print(thistuple)
Access Tuple Items
You can access tuple items by referring to the index number, inside square brackets:
Example
Return the item in position 1:
thistuple = ("apple", "banana", "cherry")
print(thistuple[1])
Change Tuple Values
Once a tuple is created, you cannot change its values. Tuples are unchangeable.
Loop Through a Tuple
You can loop through the tuple items by using a
for loop.Example
Iterate through the items and print the values:
thistuple = ("apple", "banana", "cherry")
for x in thistuple:
print(x)
You will learn more about
for loops in out Python For Loops Chapter.Check if Item Exists
To determine if a specified item is present in a tuple use the
in keyword:Example
Check if "apple" is present in the tuple:
thistuple = ("apple", "banana", "cherry")
if "apple" in thistuple:
print("Yes, 'apple' is in the fruits tuple")
Tuple Length
To determine how many items a tuple has, use the
len() method:Example
Print the number of items in the tuple:
thistuple = ("apple", "banana", "cherry")
print(len(thistuple))
Add Items
Once a tuple is created, you cannot add items to it. Tuples are unchangeable.
Example
You cannot add items to a tuple:
thistuple = ("apple", "banana", "cherry")
thistuple[3] = "orange" # This will raise an errorprint(thistuple)
Remove Items
Note: You cannot remove items in a tuple.
Tuples are unchangeable, so you cannot remove items from it, but you can delete the tuple completely:
Example
The
del keyword can delete the tuple completely:
thistuple = ("apple", "banana", "cherry")
del thistuple
print(thistuple) #this will raise an error because the tuple no longer exists
The tuple() Constructor
It is also possible to use the tuple() constructor to make a tuple.
Example
Using the tuple() method to make a tuple:
thistuple = tuple(("apple", "banana", "cherry")) # note the double round-bracketsprint(thistuple)