Master Python Lambdas, None, and *args/**kwargs in Minutes

The author, "皮皮", shares a Python basic question from a group and provides a detailed answer.

Implementation Process

The brackets in the syntax indicate optional parameters; they can contain multiple, single, or no arguments.

Example without parameters using a lambda expression:

func = lambda: x**2
x = 4
print(func())

Alternative form with a default argument:

func = lambda x=4: x**2
print(func())

Additional knowledge points:

None is a special null value in Python; its type is NoneType, distinct from zero.

args is a tuple of positional arguments, while kwargs is a dictionary of keyword arguments.

These explanations help beginners understand Python fundamentals.