def _last_stack_str():
 stack = extract_stack()
 for s in stack[::(-1)]:
  if (op.join('vispy', 'gloo', 'buffer.py') not in __file__):
   break
 return format_list([s])[0]

def _last_stack_str ( ) : stack = extract_stack ( ) for s in stack [ : : ( - 1 ) ] : if ( op . join ( 'vispy' , 'gloo' , 'buffer.py' ) not in __file__ ) : break return format_list ( [ s ] ) [ 0 ]
print stack trace from call that didnt originate from here .