def — Expert Playground

Defines a new function or method

Python Playground

def example(x: int, y: str = "hello") -> bool:
    """An example function."""
    z = x + len(y)
    return z > 10

import dis
import inspect

# Signature
sig = inspect.signature(example)
print(f"Signature: {sig}")

# Annotations
print(f"Annotations: {example.__annotations__}")

# Code object
code = example.__code__
print(f"Variables: {code.co_varnames}")
print(f"Constants: {code.co_consts}")

# Bytecode
print(f"\nBytecode:")
dis.dis(example)

Output

Click "Run" to execute your code

Functions are first-class objects with rich metadata: __code__ holds the compiled bytecode, __annotations__ holds type hints, and __doc__ holds the docstring. The dis module shows the bytecode instructions.

Challenge

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?

View all Expert examples for def