1. Introduction to Tuples in Python
A tuple can be written as a collection of comma-separated values enclosed within parentheses (). Because they are immutable, they are perfect for storing data that should not be altered throughout the life of a program.
t1 = ()
print(t1)t2 = (123, "python", 3.7)
print(t2)t3 = (1, 2, 3, 4, 5, 6)
print(t3)t4 = ("C",)
print(t4)2. Tuple Indexing
Like lists, tuple indexing starts from 0. Elements can be accessed using the slice operator [].
mytuple = ('banana', 'apple', 'mango', 'tomato', 'berry')
print(mytuple[0])mytuple = ('banana', 'apple', 'mango', 'tomato', 'berry')
print(mytuple[2])mytuple = ('banana', 'apple', 'mango', 'tomato', 'berry')
print(mytuple[1:3])Negative Indexing
Python allows the use of negative indexing. The negative indices are counted from the right side, starting at -1.
mytuple = ('banana', 'apple', 'mango', 'tomato', 'berry')
print(mytuple[-1])mytuple = ('banana', 'apple', 'mango', 'tomato', 'berry')
print(mytuple[-3])mytuple = ('banana', 'apple', 'mango', 'tomato', 'berry')
print(mytuple[-4:-2])3. Tuple Operators
You can manipulate tuples using operators like + (Concatenation), * (Repetition), and check for elements using in or not in (Membership).
num = (1, 2, 3, 4, 5)
lang = ('python', 'c', 'java', 'php')
print(num + lang)num = (1, 2, 3, 4, 5)
print(num * 2)lang = ('python', 'c', 'java', 'php')
print('cpp' in lang)num = (1, 2, 3, 4, 5)
print(6 not in num)🧠Pop Quiz 1: Tuple Syntax
Question: How do you define a tuple with exactly one element, the string "Hello"?
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Answer: ("Hello",)
Explanation: The trailing comma is mandatory. Without the comma, Python treats ("Hello") simply as a string surrounded by parentheses.
4. Adding or Removing Elements
Unlike lists, the tuple items cannot be updated or deleted as tuples are immutable.
tup = ('python', 'c', 'java', 'php')
tup[3] = "html"To delete an entire tuple, we can use the del keyword with the tuple name.
tup = ('python', 'c', 'java', 'php')
del tup
# If we try to print(tup) now, it will raise a NameError.5. Iterating a Tuple
A tuple can be iterated by using a standard for in loop.
lang = ('python', 'c', 'java', 'php')
print("The tuple items are \n")
for i in lang:
print(i)🧠Pop Quiz 2: Mutability
Question: True or False: You can use the remove() method to take an item out of a tuple.
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Answer: False.
Explanation: Tuples are immutable, meaning they cannot be changed after creation. Methods like append(), insert(), remove(), and pop() do not exist for tuples.
6. Tuple Functions & Methods
Python provides various built-in functions that work on tuples, such as finding lengths, maximums, and minimums. Since tuples can't be changed, they only have two specific methods: count() and index().
num = (1, 2, 3, 4, 5, 6)
print("length of tuple :", len(num))t1 = (1, 2, 3, 4, 5, 6)
t2 = ('java', 'c', 'python', 'cpp')
print("Max of Tuple t1 :", max(t1))
print("Max of Tuple t2 :", max(t2))t1 = (1, 2, 3, 4, 5, 6)
t2 = ('java', 'c', 'python', 'cpp')
print("Min of Tuple t1 :", min(t1))
print("Min of Tuple t2 :", min(t2))t1 = (1, 2, 3, 4, 5, 6)
print("Sum of tuple items :", sum(t1))str_val = "python"
t1 = tuple(str_val)
print(t1)
num_list = [1, 2, 3, 4, 5, 6]
t2 = tuple(num_list)
print(t2)num = (1, 3, 2, 4, 6, 5)
lang = ('java', 'c', 'python', 'cpp')
print(sorted(num))
print(sorted(lang))num = (1, 2, 3, 4, 3, 2, 2, 1, 4, 5, 8)
cnt = num.count(2)
print("Count of 2 is:", cnt)
cnt = num.count(10)
print("Count of 10 is:", cnt)t1 = ('p', 'y', 't', 'o', 'n', 'p')
print(t1.index('t'))
print(t1.index('p'))
print(t1.index('p', 3, 10)) # Search for 'p' between index 3 and 10🧠Pop Quiz 3: Functions vs Methods
Question: When you use sorted() on a tuple, what data type does it return?
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Answer: A List.
Explanation: Because tuples cannot be modified in place, the sorted() function takes the elements of the tuple, sorts them, and returns them as a brand new list (e.g., [1, 2, 3] instead of (1, 2, 3)).
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