* ✨ Add support for `lifespan` async context managers (superseding `startup` and `shutdown` events). Initial PR [#2944](https://github.com/tiangolo/fastapi/pull/2944) by [@uSpike](https://github.com/uSpike).

Now, instead of using independent `startup` and `shutdown` events, you can define that logic in a single function with `yield` decorated with `@asynccontextmanager` (an async context manager).

For example:

```Python

# Release 2.16.2

### Bug Fixes and Other Changes

*  Fixed: Incorrect dependency metadata in TensorFlow Python packages causing installation failures with certain package managers such as Poetry.

# Release 2.16.1

## TensorFlow

*   TensorFlow Windows Build:

    *   Clang is now the default compiler to build TensorFlow CPU wheels on the

subtle.ConstantTimeByteEq(em[0], 0) seed := em[1 : hash.Size()+1] db := em[hash.Size()+1:] mgf1XOR(seed, mgfHash, db) mgf1XOR(db, mgfHash, seed) lHash2 := db[0:hash.Size()] // We have to validate the plaintext in constant time in order to avoid // attacks like: J. Manger. A Chosen Ciphertext Attack on RSA Optimal // Asymmetric Encryption Padding (OAEP) as Standardized in PKCS #1 // v2.0. In J. Kilian, editor, Advances in Cryptology. lHash2Good := subtle.ConstantTimeCompare(lHash, lHash2) // The remainder of the plaintext...

constanttime.ByteEq(em[0], 0) seed := em[1 : hash.Size()+1] db := em[hash.Size()+1:] mgf1XOR(seed, mgfHash, db) mgf1XOR(db, mgfHash, seed) lHash2 := db[0:hash.Size()] // We have to validate the plaintext in constant time in order to avoid // attacks like: J. Manger. A Chosen Ciphertext Attack on RSA Optimal // Asymmetric Encryption Padding (OAEP) as Standardized in PKCS #1 // v2.0. In J. Kilian, editor, Advances in Cryptology. lHash2Good := subtle.ConstantTimeCompare(lHash, lHash2) // The remainder of the plaintext...