x = 100

Python does not have true constants, but conventionally, uppercase names indicate constants.

PI: float = 3.1415  # Convention for constants (not enforced)

count: int = 10  # Mutable variable
count += 1  # Allowed

• Variables are dynamically typed unless explicitly hinted.

Python has a few native literals.

my_int = 10
my_binary = 0b1010
my_octal = 0o12
my_hex = 0xA
my_float = 10.5
my_sci_not = 2.0e3
my_complex = 3 + 4j
my_bool = True
my_None = None

For strings, multi-line and raw strings are supported:

my_str = 'hello'
my_str_double = "hello"
my_multi_line = """hello
                   there"""
my_raw = r"New\nLine" -- ignores escape sequences
my_formatted = f"Hello {name}"

The complex type literals are as follows:

my_list = [1, 2, 3]
my_tuple = (1,2,3)  -- note that Tuple types are separate to arrays in python
my_single_tuple = (42,)  -- special syntax single-element tuple
my_dict = {"key": "value", "age": 30}
my_set = {1, 2, 3}
my_empty_set = set()  -- avoid confusion with empty dict
my_bytes = b"hello"`
my_byte_array = bytearray(b"hello")