Support bf16 weight and dynamic shape

[yuanzhedong]

• Fix crash when weight is not support by numpy(e.g. BFloat16)
• Fix crash when the shape is dynamic(not an integer)

[yuanzhedong]

Tested with bf16 weight and dynamic shape

[yuanzhedong]

Hi @jinjingforever, could you take a look when have time? Thank you!

[jinjingforever]

Thanks @yuanzhedong! I will let @yijie-yang take a look.

[yuanzhedong]

Thank you, lgtm!

Thank you! Just fixed the format using

pyink --pyink-use-majority-quotes --pyink-indentation=2 --preview --unstable --line-length 80 --extend-exclude .downloads --extend-exclude "\.pyi" ./