Find correct python executable (#1156)

* find correct python executable
For script scrapers using python, both python and python3 are valid depending on the OS and running environment. To save users from having any issues, this change will find the correct executable for them.

Co-authored-by: bnkai <bnkai@users.noreply.github.com>

pkg/scraper/script.go

@@ -30,6 +30,13 @@ func newScriptScraper(scraper scraperTypeConfig, config config, globalConfig Glo
 func (s *scriptScraper) runScraperScript(inString string, out interface{}) error {
 	command := s.scraper.Script
 
+	if command[0] == "python" || command[0] == "python3" {
+		executable, err := findPythonExecutable()
+		if err == nil {
+			command[0] = executable
+		}
+	}
+
 	cmd := exec.Command(command[0], command[1:]...)
 	cmd.Dir = filepath.Dir(s.config.path)
 
@@ -184,3 +191,19 @@ func (s *scriptScraper) scrapeMovieByURL(url string) (*models.ScrapedMovie, erro
 
 	return &ret, err
 }
+
+func findPythonExecutable() (string, error) {
+	_, err := exec.LookPath("python3")
+
+	if err != nil {
+		_, err = exec.LookPath("python")
+
+		if err != nil {
+			return "", err
+		}
+
+		return "python", nil
+	}
+
+	return "python3", nil
+}