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|
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE NoImplicitPrelude #-}
-- | Python execution tool for agent use.
--
-- Executes Python snippets via subprocess with timeout support.
-- Writes code to temp file, executes with python3, cleans up after.
--
-- Available stdlib: requests, json, csv, re, datetime, urllib
--
-- : out omni-agent-tools-python
-- : dep aeson
-- : dep process
-- : dep directory
-- : dep temporary
module Omni.Agent.Tools.Python
( pythonExecTool,
PythonExecArgs (..),
PythonResult (..),
main,
test,
)
where
import Alpha
import Data.Aeson ((.:), (.:?), (.=))
import qualified Data.Aeson as Aeson
import qualified Data.Text as Text
import qualified Data.Text.IO as TextIO
import qualified Omni.Agent.Engine as Engine
import qualified Omni.Test as Test
import qualified System.Directory as Directory
import qualified System.Exit as Exit
import qualified System.Process as Process
import System.Timeout (timeout)
main :: IO ()
main = Test.run test
test :: Test.Tree
test =
Test.group
"Omni.Agent.Tools.Python"
[ Test.unit "pythonExecTool has correct name" <| do
Engine.toolName pythonExecTool Test.@=? "python_exec",
Test.unit "pythonExecTool schema is valid" <| do
let schema = Engine.toolJsonSchema pythonExecTool
case schema of
Aeson.Object _ -> pure ()
_ -> Test.assertFailure "Schema should be an object",
Test.unit "PythonExecArgs parses correctly" <| do
let json = Aeson.object ["code" .= ("print('hello')" :: Text)]
case Aeson.fromJSON json of
Aeson.Success (args :: PythonExecArgs) -> pythonCode args Test.@=? "print('hello')"
Aeson.Error e -> Test.assertFailure e,
Test.unit "PythonExecArgs parses with timeout" <| do
let json = Aeson.object ["code" .= ("x = 1" :: Text), "timeout" .= (10 :: Int)]
case Aeson.fromJSON json of
Aeson.Success (args :: PythonExecArgs) -> do
pythonCode args Test.@=? "x = 1"
pythonTimeout args Test.@=? Just 10
Aeson.Error e -> Test.assertFailure e,
Test.unit "simple print statement" <| do
let args = Aeson.object ["code" .= ("print('hello world')" :: Text)]
result <- Engine.toolExecute pythonExecTool args
case Aeson.fromJSON result of
Aeson.Success (r :: PythonResult) -> do
pythonResultExitCode r Test.@=? 0
("hello world" `Text.isInfixOf` pythonResultStdout r) Test.@=? True
Aeson.Error e -> Test.assertFailure e,
Test.unit "syntax error handling" <| do
let args = Aeson.object ["code" .= ("def broken(" :: Text)]
result <- Engine.toolExecute pythonExecTool args
case Aeson.fromJSON result of
Aeson.Success (r :: PythonResult) -> do
(pythonResultExitCode r /= 0) Test.@=? True
not (Text.null (pythonResultStderr r)) Test.@=? True
Aeson.Error e -> Test.assertFailure e,
Test.unit "import json works" <| do
let code = "import json\nprint(json.dumps({'a': 1}))"
args = Aeson.object ["code" .= (code :: Text)]
result <- Engine.toolExecute pythonExecTool args
case Aeson.fromJSON result of
Aeson.Success (r :: PythonResult) -> do
pythonResultExitCode r Test.@=? 0
("{\"a\": 1}" `Text.isInfixOf` pythonResultStdout r) Test.@=? True
Aeson.Error e -> Test.assertFailure e,
Test.unit "timeout handling" <| do
let code = "import time\ntime.sleep(5)"
args = Aeson.object ["code" .= (code :: Text), "timeout" .= (1 :: Int)]
result <- Engine.toolExecute pythonExecTool args
case Aeson.fromJSON result of
Aeson.Success (r :: PythonResult) -> do
pythonResultExitCode r Test.@=? (-1)
("timeout" `Text.isInfixOf` Text.toLower (pythonResultStderr r)) Test.@=? True
Aeson.Error e -> Test.assertFailure e
]
data PythonExecArgs = PythonExecArgs
{ pythonCode :: Text,
pythonTimeout :: Maybe Int
}
deriving (Show, Eq, Generic)
instance Aeson.FromJSON PythonExecArgs where
parseJSON =
Aeson.withObject "PythonExecArgs" <| \v ->
(PythonExecArgs </ (v .: "code"))
<*> (v .:? "timeout")
data PythonResult = PythonResult
{ pythonResultStdout :: Text,
pythonResultStderr :: Text,
pythonResultExitCode :: Int
}
deriving (Show, Eq, Generic)
instance Aeson.ToJSON PythonResult where
toJSON r =
Aeson.object
[ "stdout" .= pythonResultStdout r,
"stderr" .= pythonResultStderr r,
"exit_code" .= pythonResultExitCode r
]
instance Aeson.FromJSON PythonResult where
parseJSON =
Aeson.withObject "PythonResult" <| \v ->
(PythonResult </ (v .: "stdout"))
<*> (v .: "stderr")
<*> (v .: "exit_code")
pythonExecTool :: Engine.Tool
pythonExecTool =
Engine.Tool
{ Engine.toolName = "python_exec",
Engine.toolDescription =
"Execute Python code and return the output. "
<> "Use for data processing, API calls, calculations, or any task requiring Python. "
<> "Available libraries: requests, json, csv, re, datetime, urllib. "
<> "Code runs in a subprocess with a 30 second default timeout.",
Engine.toolJsonSchema =
Aeson.object
[ "type" .= ("object" :: Text),
"properties"
.= Aeson.object
[ "code"
.= Aeson.object
[ "type" .= ("string" :: Text),
"description" .= ("Python code to execute" :: Text)
],
"timeout"
.= Aeson.object
[ "type" .= ("integer" :: Text),
"description" .= ("Timeout in seconds (default: 30)" :: Text)
]
],
"required" .= (["code"] :: [Text])
],
Engine.toolExecute = executePythonExec
}
executePythonExec :: Aeson.Value -> IO Aeson.Value
executePythonExec v =
case Aeson.fromJSON v of
Aeson.Error e -> pure <| mkError ("Invalid arguments: " <> Text.pack e)
Aeson.Success args -> do
let code = pythonCode args
timeoutSecs = fromMaybe 30 (pythonTimeout args)
timeoutMicros = timeoutSecs * 1000000
tmpDir <- Directory.getTemporaryDirectory
let tmpFile = tmpDir <> "/python_exec_" <> show (codeHash code) <> ".py"
result <-
try <| do
TextIO.writeFile tmpFile code
let proc = Process.proc "python3" [tmpFile]
mResult <- timeout timeoutMicros <| Process.readCreateProcessWithExitCode proc ""
Directory.removeFile tmpFile
pure mResult
case result of
Left (e :: SomeException) -> do
_ <- try @SomeException <| Directory.removeFile tmpFile
pure <| mkError ("Execution failed: " <> tshow e)
Right Nothing -> do
_ <- try @SomeException <| Directory.removeFile tmpFile
pure
<| Aeson.toJSON
<| PythonResult
{ pythonResultStdout = "",
pythonResultStderr = "Timeout: execution exceeded " <> tshow timeoutSecs <> " seconds",
pythonResultExitCode = -1
}
Right (Just (exitCode, stdoutStr, stderrStr)) ->
pure
<| Aeson.toJSON
<| PythonResult
{ pythonResultStdout = Text.pack stdoutStr,
pythonResultStderr = Text.pack stderrStr,
pythonResultExitCode = exitCodeToInt exitCode
}
exitCodeToInt :: Exit.ExitCode -> Int
exitCodeToInt Exit.ExitSuccess = 0
exitCodeToInt (Exit.ExitFailure n) = n
mkError :: Text -> Aeson.Value
mkError err =
Aeson.toJSON
<| PythonResult
{ pythonResultStdout = "",
pythonResultStderr = err,
pythonResultExitCode = -1
}
codeHash :: Text -> Int
codeHash = Text.foldl' (\h c -> 31 * h + fromEnum c) 0
|
