updated some examples from ch. 17 e 18 to Python 3.7
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Luciano Ramalho
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@ -31,7 +31,7 @@ async def slow_function(): # <5>
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async def supervisor(): # <7>
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async def supervisor(): # <7>
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spinner = asyncio.ensure_future(spin('thinking!')) # <8>
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spinner = asyncio.create_task(spin('thinking!')) # <8>
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print('spinner object:', spinner) # <9>
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print('spinner object:', spinner) # <9>
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result = await slow_function() # <10>
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result = await slow_function() # <10>
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spinner.cancel() # <11>
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spinner.cancel() # <11>
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@ -39,9 +39,7 @@ async def supervisor(): # <7>
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def main():
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def main():
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loop = asyncio.get_event_loop() # <12>
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result = asyncio.run(supervisor()) # <12>
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result = loop.run_until_complete(supervisor()) # <13>
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loop.close()
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print('Answer:', result)
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print('Answer:', result)
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@ -1,19 +0,0 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Charfinder</title>
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</head>
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<body>
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Examples: {links}
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<p>
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<form action="/">
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<input type="search" name="query" value="{query}">
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<input type="submit" value="find"> {message}
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</form>
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</p>
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<table>
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{result}
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</table>
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</body>
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</html>
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@ -1,71 +0,0 @@
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#!/usr/bin/env python3
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import sys
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import asyncio
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from aiohttp import web
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from charfinder import UnicodeNameIndex
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TEMPLATE_NAME = 'http_charfinder.html'
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CONTENT_TYPE = 'text/html; charset=UTF-8'
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SAMPLE_WORDS = ('bismillah chess cat circled Malayalam digit'
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' Roman face Ethiopic black mark symbol dot'
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' operator Braille hexagram').split()
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ROW_TPL = '<tr><td>{code_str}</td><th>{char}</th><td>{name}</td></tr>'
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LINK_TPL = '<a href="/?query={0}" title="find "{0}"">{0}</a>'
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LINKS_HTML = ', '.join(LINK_TPL.format(word) for word in
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sorted(SAMPLE_WORDS, key=str.upper))
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index = UnicodeNameIndex()
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with open(TEMPLATE_NAME) as tpl:
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template = tpl.read()
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template = template.replace('{links}', LINKS_HTML)
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# BEGIN HTTP_CHARFINDER_HOME
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def home(request): # <1>
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query = request.GET.get('query', '').strip() # <2>
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print('Query: {!r}'.format(query)) # <3>
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if query: # <4>
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descriptions = list(index.find_descriptions(query))
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res = '\n'.join(ROW_TPL.format(**vars(descr))
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for descr in descriptions)
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msg = index.status(query, len(descriptions))
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else:
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descriptions = []
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res = ''
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msg = 'Enter words describing characters.'
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html = template.format(query=query, result=res, # <5>
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message=msg)
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print('Sending {} results'.format(len(descriptions))) # <6>
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return web.Response(content_type=CONTENT_TYPE, text=html) # <7>
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# END HTTP_CHARFINDER_HOME
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# BEGIN HTTP_CHARFINDER_SETUP
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async def init(loop, address, port): # <1>
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app = web.Application(loop=loop) # <2>
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app.router.add_route('GET', '/', home) # <3>
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handler = app.make_handler() # <4>
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server = await loop.create_server(handler,
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address, port) # <5>
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return server.sockets[0].getsockname() # <6>
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def main(address="127.0.0.1", port=8888):
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port = int(port)
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loop = asyncio.get_event_loop()
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host = loop.run_until_complete(init(loop, address, port)) # <7>
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print('Serving on {}. Hit CTRL-C to stop.'.format(host))
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try:
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loop.run_forever() # <8>
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except KeyboardInterrupt: # CTRL+C pressed
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pass
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print('Server shutting down.')
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loop.close() # <9>
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if __name__ == '__main__':
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main(*sys.argv[1:])
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# END HTTP_CHARFINDER_SETUP
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@ -1,53 +0,0 @@
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# spinner_asyncio.py
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# credits: Example by Luciano Ramalho inspired by
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# Michele Simionato's multiprocessing example in the python-list:
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# https://mail.python.org/pipermail/python-list/2009-February/538048.html
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# BEGIN SPINNER_ASYNCIO
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import asyncio
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import itertools
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import sys
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@asyncio.coroutine # <1>
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def spin(msg): # <2>
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write, flush = sys.stdout.write, sys.stdout.flush
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for char in itertools.cycle('|/-\\'):
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status = char + ' ' + msg
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write(status)
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flush()
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write('\x08' * len(status))
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try:
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yield from asyncio.sleep(.1) # <3>
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except asyncio.CancelledError: # <4>
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break
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write(' ' * len(status) + '\x08' * len(status))
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@asyncio.coroutine
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def slow_function(): # <5>
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# pretend waiting a long time for I/O
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yield from asyncio.sleep(3) # <6>
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return 42
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@asyncio.coroutine
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def supervisor(): # <7>
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spinner = asyncio.async(spin('thinking!')) # <8>
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print('spinner object:', spinner) # <9>
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result = yield from slow_function() # <10>
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spinner.cancel() # <11>
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return result
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def main():
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loop = asyncio.get_event_loop() # <12>
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result = loop.run_until_complete(supervisor()) # <13>
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loop.close()
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print('Answer:', result)
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if __name__ == '__main__':
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main()
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# END SPINNER_ASYNCIO
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