hasattr() — Expert Playground

Returns True if an object has the given named attribute

Python Playground

# hasattr() internals
import dis

def using_hasattr():
    pass

# Bytecode analysis
dis.dis(using_hasattr)

# Check if it's truly built-in
import builtins
print(f"\nhasattr is builtin: {hasattr(builtins, 'hasattr')}")
print(f"Type: {type(builtins.hasattr)}")

Output

Click "Run" to execute your code

Understanding the internal implementation helps optimize hot paths in performance-critical code.

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 hasattr()