Python Data Types

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Python Data Types

In programming, a data type defines the kind of value a variable can store and the operations

that can be performed on it. Python is dynamically typed, meaning you don’t need to declare a

data type explicitly—Python determines it automatically based on the value assigned.

Different data types serve different purposes, such as storing text, numbers, collections, or

logical values.

Built-in Data Types in Python

Python provides several built-in data types, grouped into the following categories:

•  Text Type: str
•  Numeric Types: int, float, complex
•  Sequence Types: list, tuple, range
•  Mapping Type: dict
•  Set Types: set, frozenset
•  Boolean Type: bool
•  Binary Types: bytes, bytearray, memoryview
•  None Type: NoneType

Checking the Data Type

You can identify the data type of any variable or object using the built-in type() function.

Example:

value = 42 print(type(value)) This helps you understand how Python is interpreting your data.

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Data Types Are Assigned Automatically

In Python, the data type is assigned at the moment a value is stored in a variable.

Examples:

text = "Python Basics" number = 100 price = 49.75 imaginary = 2 + 3j items = ["pen", "book", "eraser"] coordinates = (10, 20) numbers = range(1, 5) profile = {"username": "admin", "active": True} colors = {"red", "green", "blue"} fixed_colors = frozenset({"red", "green", "blue"}) is_valid = False raw_data = b"Data" buffer = bytearray(8) view = memoryview(bytes(4)) empty_value = None Each variable automatically gets its corresponding data type based on the assigned value.

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Explicitly Setting a Data Type

If you want to control or convert the data type explicitly, Python provides constructor functions

for each type.

Examples:

a = str(2025) b = int("30") c = float("19.99") d = complex(4, 5) e = list(("cat", "dog", "bird")) f = tuple((1, 2, 3)) g = range(10) h = dict(city="Chennai", code=600001) i = set(("HTML", "CSS", "Python")) j = frozenset(("HTML", "CSS", "Python")) k = bool(0) l = bytes(6) m = bytearray(6) n = memoryview(bytes(6))

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Constructor functions are especially useful when working with user input, file data, or type conversions.

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