Bugs
Python Async/Await Mistakes: What Goes Wrong
Forgetting an await, blocking the event loop, or mixing sync and async incorrectly are extremely common mistakes even for experienced developers.
❌ Missing await Keyword
async def fetch_data(url):
async with aiohttp.ClientSession() as session:
response = session.get(url) # Bug: missing await!
return response.json() # Returns coroutine, not data✅ Correctly Awaited
async def fetch_data(url):
async with aiohttp.ClientSession() as session:
response = await session.get(url)
return await response.json()💡
Pro tip: Never call time.sleep(), requests.get(), or file I/O inside async functions. Use asyncio.sleep(), aiohttp, and aiofiles instead.
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