Hi~ I think this is not the issue of tvmscript. For example, though 
`List[Integer]` is supported by script, it would fail in lowering with `Illegal 
attribute of key pragma_key, value type Array not supported`, since the 
annotation can not convert to an attr stmt.   
```python
import tvm
from tvm.script import tir as T

@T.prim_func
def fun(x: T.Buffer((16,), "int32")) -> None:
    for k in T.serial(0, 16, annotations={"pragma_key": [1, 2, 3]}):
        x[k] = 1

print(tvm.lower(fun).script())
```





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