Python data types reminder

🐍 Python Built-in Data Types

Python has several built-in data types grouped into categories:

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📦 Basic Types

Type	Description	Example
int	Integer numbers	x = 10
float	Floating-point numbers	pi = 3.14
complex	Complex numbers	z = 2 + 3j
bool	Boolean values (True or False)	is_valid = True
str	Text (string)	name = "Alice"
NoneType	Represents the absence of a value	x = None

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📚 Sequence Types

Type	Description	Example
list	Ordered, mutable sequence	fruits = ["apple", "banana"]
tuple	Ordered, immutable sequence	point = (1, 2)
range	Sequence of numbers (typically for loops)	range(5) → 0,1,2,3,4

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🔑 Mapping Type

Type	Description	Example
dict	Key-value pairs	user = {"name": "Alice", "age": 30}

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🔢 Set Types

Type	Description	Example
set	Unordered, unique items	colors = {"red", "blue"}
frozenset	Immutable set	fs = frozenset([1, 2, 3])

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🧵 Binary Types

Type	Description	Example
bytes	Immutable sequence of bytes	b = b"hello"
bytearray	Mutable sequence of bytes	ba = bytearray(b"hello")
memoryview	Memory view of a byte object	mv = memoryview(b"hello")

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🛠️ Type Checking

type(42)          # <class 'int'>
isinstance("hi", str)  # True

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🧠 Tip

Use type() to inspect a value’s type, and isinstance() to check if a value matches a certain type.