human
Solve the following python programming problem given the following code:
@ classmethod 
def QueryComments(cls, client, viewpoint_id, callback, excl_start_key = None, limit = None) : 
    "Queries comments belonging to the viewpoint (up to 'limit' total) for
    the specified 'viewpoint_id'. Starts with comments having a key greater
    than 'excl_start_key'. Returns a tuple with the array of comments and
    the last queried key.
    " 
    def _OnQueryComments(comments) : 
        callback ((comments, (comments [(- 1)].comment_id if (len (comments) > 0) else None))) 
Comment.RangeQuery (client, viewpoint_id, range_desc = None, limit = excl_start_key, col_names = None, callback = _OnQueryComments, excl_start_key = excl_start_key) 

    
    

    Fix the buggy line: Comment.RangeQuery (client, viewpoint_id, range_desc = None, limit = excl_start_key, col_names = None, callback = _OnQueryComments, excl_start_key = excl_start_key)
assistant
#Here is Python code to fix the buggy line: Comment.

Comment.RangeQuery (client, viewpoint_id, range_desc = None, limit = limit, col_names = None, callback = _OnQueryComments, excl_start_key = excl_start_key)