python協程

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python3.5為asyncio提供了async和await文法，利用這兩個可簡化協程的實現。

 1 import asyncio 2 import random 3  4  5 async def smart_fib(n): 6     index = 0 7     a = 0 8     b = 1 9     while index < n:10         sleep_secs = random.uniform(0, 0.2)11         await asyncio.sleep(sleep_secs)12         print(‘Smart one think {} secs to get {}‘.format(sleep_secs, b))13         a, b = b, a + b14         index += 115 16 17 async def stupid_fib(n):18     index = 019     a = 020     b = 121     while index < n:22         sleep_secs = random.uniform(0, 0.4)23         await asyncio.sleep(sleep_secs)24         print(‘Stupid one think {} secs to get {}‘.format(sleep_secs, b))25         a, b = b, a + b26         index += 127 28 29 30 if __name__ == ‘__main__‘:31     loop = asyncio.get_event_loop()32     tasks = [33         asyncio.ensure_future(smart_fib(10)),34         asyncio.ensure_future(stupid_fib(10)),35     ]36     loop.run_until_complete(asyncio.wait(tasks))37     print(‘All fib finished.‘)38     loop.close()

 

python協程