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Go

/*
* Copyright 2025 CloudWeGo Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package tools
import (
"context"
"fmt"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/cloudwego/eino-examples/adk/multiagent/deep/utils"
"github.com/cloudwego/eino-ext/components/tool/commandline"
"github.com/cloudwego/eino/components/tool"
"github.com/cloudwego/eino/schema"
jsoniter "github.com/json-iterator/go"
"github.com/cloudwego/eino-examples/adk/multiagent/deep/params"
)
var toolPythonRunnerInfo = &schema.ToolInfo{
Name: "python_runner",
Desc: `Write Python code to a file and execute it, and return the execution result.
Code would be overwritten to the same file when this tool is called multiple times.`,
ParamsOneOf: schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
"code": {
Type: "string",
Desc: "Python code to be executed. " +
"The code MUST be enclosed in a Markdown code block starting with ```python and ending with ```. " +
"CRITICAL: The code within the block must be a raw, multi-line string with real newlines. " +
"It MUST NOT be a JSON-escaped string containing literal '\\n' or '\\\"' sequences. " +
"The code must be ready for direct execution without any unescaping. " +
"Do not generate code comments.",
Required: true,
},
}),
}
func NewPythonRunnerTool(op commandline.Operator) tool.InvokableTool {
return &pythonRunnerTool{op: op}
}
type pythonRunnerTool struct {
op commandline.Operator
}
func (p *pythonRunnerTool) Info(ctx context.Context) (*schema.ToolInfo, error) {
return toolPythonRunnerInfo, nil
}
func (p *pythonRunnerTool) InvokableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (string, error) {
code := tryExtractCodeSnippet(argumentsInJSON)
if code == "" {
return "", fmt.Errorf("python code is empty, original=%s", argumentsInJSON)
}
taskID := params.MustGetContextParams[string](ctx, params.TaskIDKey)
wd, ok := params.GetTypedContextParams[string](ctx, params.WorkDirSessionKey)
if !ok {
return "", fmt.Errorf("work dir not found")
}
filePath := filepath.Join(wd, fmt.Sprintf("%s.py", taskID))
if err := p.op.WriteFile(ctx, filePath, code); err != nil {
return fmt.Sprintf("failed to create python file %s: %v", filePath, err), nil
}
pyExecutablePath := os.Getenv("EXCEL_AGENT_PYTHON_EXECUTABLE_PATH")
if pyExecutablePath == "" {
pyExecutablePath = "python"
}
result, err := p.op.RunCommand(ctx, []string{pyExecutablePath, filePath})
if err != nil {
if strings.HasPrefix(err.Error(), "internal error") {
return err.Error(), nil
}
return "", fmt.Errorf("execute error: %w", err)
}
return utils.FormatCommandOutput(result), nil
}
func tryExtractCodeSnippet(res string) string {
var input struct {
Code string `json:"code"`
}
var codeToProcess string
err := jsoniter.Unmarshal([]byte(res), &input)
if err != nil {
codeToProcess = res
} else {
codeToProcess = input.Code
}
rawCode := extractCodeSnippet(codeToProcess)
unescapedCode := strings.NewReplacer(
"\\\\", "\\",
"\\n", "\n",
"\\r", "\r",
"\\t", "\t",
"\\\"", "\"",
"\\'", "'",
).Replace(rawCode)
return unescapedCode
}
func extractCodeSnippet(res string) string {
codePattern := regexp.MustCompile("(?s)```python\\s*(.*?)\\s*```")
codeMatch := codePattern.FindStringSubmatch(res)
if len(codeMatch) > 1 {
return strings.TrimSpace(codeMatch[1])
} else {
fallbackPattern := regexp.MustCompile("(?s)```\\s*(.*?)\\s*```")
fallbackMatch := fallbackPattern.FindStringSubmatch(res)
if len(fallbackMatch) > 1 {
return strings.TrimSpace(fallbackMatch[1])
} else {
return strings.TrimSpace(res)
}
}
}