python range() 和xrange()的區別
Help on built-in function range in module __builtin__: range(...) range(stop) -> list of ...
Help on built-in function range in module __builtin__: range(...) range(stop) -> list of ...
Python官方文檔里是這樣說的: xrange([start,] stop[, step])This function is very similar to range(), but returns an ``xrange object'' instead of a list. ...