Python Data Types

Definition(s):

• Mutability

Basic Data Types

Type	Description	Example
int	Integer numbers	x = 5
float	Floating-point numbers	y = 3.14
complex	Complex numbers	z = 2 + 3j
str	Text/string	name = "Python"
bool	Boolean (True/False)	is_valid = True
NoneType	Represents absence of value	x = None

Collection Types

Type	Mutable	Description	Example
list	Yes	Ordered, changeable sequence	[1, 2, 3]
tuple	No	Ordered, unchangeable sequence	(1, 2, 3)
range	No	Immutable sequence of numbers	range(5)
dict	Yes	Key-value pairs	{"name": "John", "age": 30}
set	Yes	Unordered, unique elements	{1, 2, 3}
frozenset	No	Immutable set	frozenset({1, 2, 3})

Binary Types

Type	Mutable	Description	Example
bytes	No	Immutable sequence of bytes	b'hello'
bytearray	Yes	Mutable sequence of bytes	bytearray(5)
memoryview	N/A	Memory view of an object	memoryview(bytes(5))

Getting the Data Type

You can use the type() function to get the type of a variable:

x = 3.14
print(type(x))  # <class 'float'>

Setting a specific Data Type

You can use the following constructor functions to set a specific data type:

x = int(3.14)  # 3
y = float(5)   # 5.0
z = complex(2, 3)  # (2+3j)