hex() — Expert Examples

Converts an integer to a hexadecimal string prefixed with '0x'

EasyIntermediateAdvancedExpert

hex() performance and internals

Performance characteristics and CPython implementation details.

python
# hex() internals
import dis

def using_hex():
    return hex(42)

# Bytecode analysis
dis.dis(using_hex)

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

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

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