What data types exist in Python?

In Python, there are built-in and user-defined data types. Built-in types are divided into mutable and immutable types.

Immutable types:

• Numeric types:
  • int (integers)
  • float (floating-point numbers)
  • complex (complex numbers)
• str (strings)
• tuple (tuples)
• bytes (byte sequences)
• frozenset (immutable sets)

Mutable types:

• list (lists)
• dict (dictionaries)
• set (sets)
• bytearray (mutable byte sequences)

Other built-in types:

• bool (logical type: True or False)
• NoneType (type for the None value)

Examples:

# Immutable types
a = 10         # int
b = 3.14       # float
c = "hello"    # str
d = (1, 2, 3)  # tuple

# Mutable types
e = [1, 2, 3]   # list
f = {"a": 1}    # dict
g = {1, 2, 3}   # set

Brief description:

Type	Description	Mutable?
int	Whole numbers	No
float	Floating-point numbers	No
complex	Complex numbers	No
str	Sequence of characters	No
tuple	Immutable sequence of elements	No
bytes	Immutable sequence of bytes	No
frozenset	Immutable unordered set	No
list	Mutable sequence of elements	Yes
dict	Unordered collection of key-value pairs	Yes
set	Mutable unordered set	Yes
bytearray	Mutable sequence of bytes	Yes
bool	Logical value (True/False)	No
NoneType	Type for the None value	No

User-defined data types are created by developers using classes.