regular expression to extract source url from iframe

tutorial.md

extract source url and save in database

def save(self,*args,**kwargs):
        link = self.embeddedLink
        pattern = r"<iframe[^>]*src=[\"|']([^'\"]+)[\"|'][^>]*>"
        newLink = re.findall(pattern,link)[0]
        self.embeddedLink = newLink
        super().save(*args,**kwargs)