我不知道如何在python 3.5-rc2中使用等待
>>> async def foo(): ... pass >>> await foo() File "<ipython-input-10-a18cb57f9337>", line 1 await foo() SyntaxError: invalid syntax >>> c = foo() >>> await c File "<ipython-input-12-cfb6bb0723be>", line 1 await c SyntaxError: invalid syntax >>> import sys >>> sys.version '3.5.0rc2 (default, Aug 26 2015, 21:54:21) \n[GCC 5.2.0]' >>> del c