Add GetPythonRunCommand public method to return a cmd instance

Author: zoispag

README.md

@@ -36,6 +36,24 @@ out, err := python.ExecutePython("script.py")
 
 This will run a python script called `script.py` inside the virtual environment, using the proper command, analyzing files existence.
 
+Alternatively, it is possible to get an instance for `*exec.Cmd` which can be handled independently.
+
+```go
+	cmd := python.GetPythonRunCommand("script.py")
+	out, err := cmd.CombinedOutput()
+```
+or
+```go
+	cmd := python.GetPythonRunCommand("script.py")
+	err := cmd.Run()
+```
+or
+```go
+	cmd := python.GetPythonRunCommand("script.py")
+	err := cmd.Start()
+	err = cmd.Wait()
+```
+
 #### Complete example
 
 ```go

main.go

@@ -23,8 +23,8 @@ func main() {
 	python.CleanUpVirtualEnv()
 	python.SetupVirtualEnv()
 
-	out, err := python.ExecutePython("script.py")
-
+	cmd := python.GetPythonRunCommand("script.py")
+	out, err := cmd.CombinedOutput()
 	if err != nil {
 		log.Error(fmt.Sprintf("Job resulted in error: %s", err.Error()))
 	}

python/run.go

@@ -14,6 +14,12 @@ func getPythonCommand() string {
 	}
 }
 
+// GetPythonRunCommand Returns an *exec.Cmd to be handled with the provided "scriptName.py" using the python binary from virtual environment
+func GetPythonRunCommand(scriptName string) *exec.Cmd {
+	pythonPath := getPythonCommand()
+	return exec.Command(pythonPath, scriptName)
+}
+
 // ExecutePython Executes the provided "scriptName.py" using the python binary from virtual environment
 func ExecutePython(scriptName string) ([]byte, error) {
 	// run python job