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feat(host_fn): infer types from annotations #11

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Merged
chrisdickinson merged 2 commits into from
Oct 16, 2023
Merged

feat(host_fn): infer types from annotations #11

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ee9abf5
feat(host_fn): infer types from annotations
Oct 13, 2023
102815f
fixup: add extism.Codec
Oct 13, 2023
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24 changes: 8 additions & 16 deletions example.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,18 +5,18 @@
import pathlib

sys.path.append(".")
from extism import Function, host_fn, ValType, Plugin, set_log_file
from extism import Function, host_fn, ValType, Plugin, set_log_file, Json
from typing import Annotated

set_log_file("stderr", "trace")


@host_fn
def hello_world(plugin, input_, output, a_string):
@host_fn(user_data=b"Hello again!")
def hello_world(inp: Annotated[dict, Json], *a_string) -> Annotated[dict, Json]:
print("Hello from Python!")
print(a_string)
print(input_)
print(plugin.input_string(input_[0]))
output[0] = input_[0]
inp["roundtrip"] = 1
return inp


# Compare against Python implementation.
Expand All @@ -36,16 +36,7 @@ def main(args):
hash = hashlib.sha256(wasm).hexdigest()
manifest = {"wasm": [{"data": wasm, "hash": hash}]}

functions = [
Function(
"hello_world",
[ValType.I64],
[ValType.I64],
hello_world,
"Hello again!",
)
]
plugin = Plugin(manifest, wasi=True, functions=functions)
plugin = Plugin(manifest, wasi=True)
print(plugin.id)
# Call `count_vowels`
wasm_vowel_count = plugin.call("count_vowels", data)
Expand All @@ -55,6 +46,7 @@ def main(args):
print("Number of vowels:", j["count"])

assert j["count"] == count_vowels(data)
assert j["roundtrip"] == 1


if __name__ == "__main__":
Expand Down
6 changes: 6 additions & 0 deletions extism/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,9 @@
ValType,
Val,
CurrentPlugin,
Codec,
Json,
Pickle,
)

__all__ = [
Expand All @@ -28,4 +31,7 @@
"Function",
"ValType",
"Val",
"Codec",
"Json",
"Pickle",
]
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