enumerate() — Expert Playground

Adds a counter to an iterable, yielding (index, value) pairs

Python Playground

# enumerate() internals
import dis

def using_enumerate():
    pass

# Bytecode analysis
dis.dis(using_enumerate)

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

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 enumerate()