str() — Expert Examples

Converts a value to a string

EasyIntermediateAdvancedExpert

str() performance and internals

Performance characteristics and CPython implementation details.

python
# str() internals
import dis

def using_str():
    return str(42)

# Bytecode analysis
dis.dis(using_str)

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

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

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