def check_compatibility(): """Run this to identify potential issues"""
dp = DataProcessor() New: 'DataProcessor' object has no attribute 'process'. Did you mean: 'process_data'? try: dp.process() except AttributeError as e: print(e) 2. The copy Module Gets replace() Method A new method for creating modified copies of objects without mutation. python 3.13 changes
async def main_new_way(): # Python 3.13 - same syntax, but ~10-15% faster # Task creation and scheduling overhead reduced async with asyncio.TaskGroup() as tg: tasks = [tg.create_task(process_item(i)) for i in range(1000)] return [task.result() for task in tasks] async def benchmark(): start = time.perf_counter() await main_old_way() old_time = time.perf_counter() - start The copy Module Gets replace() Method A new
for module, message in checks: try: __import__(module) warnings.warn(f"⚠️ message") except ImportError: print(f"✓ module not used") Literal def is_string_list(obj: object) ->
from typing import assert_never, TypeIs, Literal def is_string_list(obj: object) -> TypeIs[list[str]]: """More precise type guard than TypeGuard""" return isinstance(obj, list) and all(isinstance(item, str) for item in obj)
# Check for removed features checks = [ ("crypt", "Module 'crypt' removed in 3.13"), ("2to3", "Tool removed in 3.13"), ]
dict_time = timeit.timeit(dict_test, setup=dict_setup, number=10000) print(f"Dictionary operations: dict_time:.3fs")