Data Types In Python¶

Immutable Data Types¶

Immutable data types are types whose values cannot be changed after they are created. Any operation that seems to modify them actually creates a new object.

Immutable Data Types in Python¶

1. Numbers (int, float, complex)
2. String (str)
3. Tuple (tuple)
4. Bytes (bytes)

Note: Attempting to modify an immutable object will result in an error. For example, strings and tuples cannot be changed after creation.

In [3]:

# Integer (int)
a = 10
print('Original a:', a)

a = a + 5  # This Creates a New Integer Object
print('Modified a:', a)

# String (str)
s = "hello"
print('Original s:', s)
try:
    s[0] = 'H'  # This Will Raise An Error
except TypeError as e:
    print('Error:', e)

# Tuple
t = (1, 2, 3)
print('Original tuple:', t)
try:
    t[0] = 10  # This Will Raise An Error
except TypeError as e:
    print('Error:', e)

# Integer (int) a = 10 print('Original a:', a) a = a + 5 # This Creates a New Integer Object print('Modified a:', a) # String (str) s = "hello" print('Original s:', s) try: s[0] = 'H' # This Will Raise An Error except TypeError as e: print('Error:', e) # Tuple t = (1, 2, 3) print('Original tuple:', t) try: t[0] = 10 # This Will Raise An Error except TypeError as e: print('Error:', e)

Original a: 10
Modified a: 15
Original s: hello
Error: 'str' object does not support item assignment
Original tuple: (1, 2, 3)
Error: 'tuple' object does not support item assignment

Mutable Data Types¶

Mutable data types are types whose values can be changed after they are created. Operations that modify these objects do not create a new object, but change the original object itself.

Mutable Data Types in Python¶

1. Set (set)
2. List (list)
3. Dictionary (dict)

Note: You can modify, add, or remove elements from mutable objects.

In [ ]:

# List
lst = [1, 2, 3]
print('Original list:', lst)

lst[0] = 10  # Modifies The List In Place
print('Modified list:', lst)

# Dictionary
d = {'a': 1, 'b': 2}
print('Original dict:', d)

d['a'] = 100  # Modifies The Dictionary In Place
print('Modified dict:', d)

# Set
s = {1, 2, 3}
print('Original set:', s)

s.add(4)  # Modifies The Set In Place
print('Modified set:', s)

# List lst = [1, 2, 3] print('Original list:', lst) lst[0] = 10 # Modifies The List In Place print('Modified list:', lst) # Dictionary d = {'a': 1, 'b': 2} print('Original dict:', d) d['a'] = 100 # Modifies The Dictionary In Place print('Modified dict:', d) # Set s = {1, 2, 3} print('Original set:', s) s.add(4) # Modifies The Set In Place print('Modified set:', s)