Shangri-La City Shangri-La City Shangri-La or Xianggelila is a county-level city in northwestern Yunnan province, People's Republic of China and is the location of the seat of the Diqing Tibetan Autonomous Prefecture. Shangri-La was formerly called Zhongdian County () but was renamed on 17 December 2001 and upgraded into a county-level city on 16 December 2014 as Shangri-La (other spellings: Semkyi'nyida, Xianggelila, or Xamgyi'nyilha) after the fictional land of Shangri-La in the 1933 James Hilton novel "Lost Horizon", in an effort to promote tourism in the area. The Tibetan population refers to this place by its traditional name Gyalthang or Gyaitang (;
S-expression be formatted as pretty printed S-expressions using the function PPRINT (note: with two Ps, short for "pretty"-print). Lisp programs are valid s-expressions, but not all s-expressions are valid Lisp programs. codice_21 is a valid s-expression, but not a valid Lisp program, since Lisp uses prefix notation and a floating point number (here 1.0) is not valid as an operation (the first element of the expression). An S-expression preceded by a single quotation mark, as in codice_22, is syntactic sugar for a quoted S-expression, in this case codice_23. S-Expressions are often compared to XML, a key difference being that S-Expressions are