code: def check_error(when='periodic check'):
      
  
      errors = []
      while True:
          err = glGetError()
          if err == GL_NO_ERROR or (errors and err == errors[-1]):
              break
          errors.append(err)
      if errors:
          msg = ', '.join([repr(ENUM_MAP.get(e, e)) for e in errors])
          err = RuntimeError('OpenGL got errors (%s): %s' % (when, msg))
          err.errors = errors
          err.err = errors[-1]  # pyopengl compat
          raise err
docs: Check this from time to time to detect GL errors.
  
      Parameters
      ----------
      when : str
          Shown in the exception to help the developer determine when
          this check was done.