Notwithstanding anything contained in section
374, where an accused person has pleaded guilty and has been convicted on such plea, there shall be no appeal,---
(a) if the conviction is by a High Court; or
(b) if the conviction is by a Court of Session, Metropolitan Magistrate or Magistrate of the first or second class, except as to the extent or legality of the sentence.
(a) if the conviction is by a High Court; or
(b) if the conviction is by a Court of Session, Metropolitan Magistrate or Magistrate of the first or second class, except as to the extent or legality of the sentence.