* ♻ Change a `dict()` for `{}` in `fastapi/utils.py`. PR [#3138](https://github.com/tiangolo/fastapi/pull/3138) by [@ShahriyarR](https://github.com/ShahriyarR).
* ♻ Move internal variable for errors in `jsonable_encoder` to put related code closer. PR [#4560](https://github.com/tiangolo/fastapi/pull/4560) by [@GuilleQP](https://github.com/GuilleQP).

    *   Make graph name scope thread local so that they work correctly in
        multi-threaded environments.
    *   Update nsync synchronization library to avoid slow primitives on Linux.
    *   Removed need to put nsync/public on C include path when building custom
        ops.
    *   Add `tf.image.psnr`, `tf.image.ssim`, `tf.image.ssim_multiscale`,
        `tf.image.image_gradients`, `tf.image.sobel_edges`.

the additional input". additionalInput := new([SeedSize]byte) sysrand.Read(additionalInput[:16]) drbg := drbgInstance.Swap(nil) if drbg == nil { drbg = drbgPool.Get().(*Counter) } defer func() { if !drbgInstance.CompareAndSwap(nil, drbg) { drbgPool.Put(drbg) } }() for len(b) > 0 { size := min(len(b), maxRequestSize) if reseedRequired := drbg.Generate(b[:size], additionalInput); reseedRequired { // See SP 800-90A Rev. 1, Section 9.3.1, Steps 6-8, as explained in // Section 9.3.2: if Generate reports...

that a DRBG does not rely on additional input to provide // entropy, even though entropy could be provided in the additional input". additionalInput := new([SeedSize]byte) sysrand.Read(additionalInput[:16]) drbg := drbgs.Get().(*Counter) defer drbgs.Put(drbg) for len(b) > 0 { size := min(len(b), maxRequestSize) if reseedRequired := drbg.Generate(b[:size], additionalInput); reseedRequired { // See SP 800-90A Rev. 1, Section 9.3.1, Steps 6-8, as explained in // Section 9.3.2: if Generate reports a reseed...