tornado

Tornado: Read uploaded CSV file?

由 最后都变了- 提交于 2020-07-22 01:23:31
问题 I want to do something like: import csv import tornado.web class MainHandler(tornado.web.RequestHandler): def post(self): uploaded_csv_file = self.request.files['file'][0] with uploaded_csv_file as csv_file: for row in csv.reader(csv_file): self.write(' , '.join(row)) But, uploaded_csv_file is not of type file . What is the best practice here? Sources: http://docs.python.org/2/library/csv.html http://docs.python.org/2/library/functions.html#open https://stackoverflow.com/a/11911972/242933 回答1

Tornado: Read uploaded CSV file?

由 谁说胖子不能爱 提交于 2020-07-22 01:23:10
问题 I want to do something like: import csv import tornado.web class MainHandler(tornado.web.RequestHandler): def post(self): uploaded_csv_file = self.request.files['file'][0] with uploaded_csv_file as csv_file: for row in csv.reader(csv_file): self.write(' , '.join(row)) But, uploaded_csv_file is not of type file . What is the best practice here? Sources: http://docs.python.org/2/library/csv.html http://docs.python.org/2/library/functions.html#open https://stackoverflow.com/a/11911972/242933 回答1

Write back through the callback attached to IOLoop in Tornado

由 白昼怎懂夜的黑 提交于 2020-06-01 07:13:31
问题 There is a tricky post handler, sometimes it can take a lots of time (depending on a input values), sometimes not. What I want is to write back whenever 1 second passes, dynamically allocating the response. def post(): def callback(): self.write('too-late') self.finish() timeout_obj = IOLoop.current().add_timeout( dt.timedelta(seconds=1), callback, ) # some asynchronous operations if not self.request.connection.stream.closed(): self.write('here is your response') self.finish() IOLoop.current(

Write back through the callback attached to IOLoop in Tornado

由 拜拜、爱过 提交于 2020-06-01 07:13:27
问题 There is a tricky post handler, sometimes it can take a lots of time (depending on a input values), sometimes not. What I want is to write back whenever 1 second passes, dynamically allocating the response. def post(): def callback(): self.write('too-late') self.finish() timeout_obj = IOLoop.current().add_timeout( dt.timedelta(seconds=1), callback, ) # some asynchronous operations if not self.request.connection.stream.closed(): self.write('here is your response') self.finish() IOLoop.current(

Why would a timeout avoid a tornado hang?

由 久未见 提交于 2020-05-18 04:12:39
问题 Waiting on a concurrent.futures.Future from a ThreadPoolExecutor in a Tornado coroutine sometimes hangs for me: def slowinc(x): time.sleep(0.1) return x + 1 yield tp_executor.submit(slowinc, 1) # sometimes hangs When I add a timeout it might hang for the timeout period, but seems to actually return the correct result after that time. yield gen.with_timeout(timedelta(seconds=5), executor.submit(...)) # hangs for 5sec, then works This only happens in the context of a larger test suite, in which

Why would a timeout avoid a tornado hang?

由 柔情痞子 提交于 2020-05-18 04:10:47
问题 Waiting on a concurrent.futures.Future from a ThreadPoolExecutor in a Tornado coroutine sometimes hangs for me: def slowinc(x): time.sleep(0.1) return x + 1 yield tp_executor.submit(slowinc, 1) # sometimes hangs When I add a timeout it might hang for the timeout period, but seems to actually return the correct result after that time. yield gen.with_timeout(timedelta(seconds=5), executor.submit(...)) # hangs for 5sec, then works This only happens in the context of a larger test suite, in which

How to store Tornado logs to a file?

由 Deadly 提交于 2020-05-10 14:42:26
问题 I've been facing issues where my server is throwing a 500 if the API isn't accessed for 30 mins at a stretch. To check the problem, I need to keep track of every single API request made. I'm using Tornado in front of Flask. This is my code so far: import tornado.httpserver import tornado.ioloop import tornado.web from flasky import app from tornado.wsgi import WSGIContainer from tornado.ioloop import IOLoop from tornado.web import FallbackHandler from tornado.log import enable_pretty_logging

How to store Tornado logs to a file?

由 ぃ、小莉子 提交于 2020-05-10 14:41:30
问题 I've been facing issues where my server is throwing a 500 if the API isn't accessed for 30 mins at a stretch. To check the problem, I need to keep track of every single API request made. I'm using Tornado in front of Flask. This is my code so far: import tornado.httpserver import tornado.ioloop import tornado.web from flasky import app from tornado.wsgi import WSGIContainer from tornado.ioloop import IOLoop from tornado.web import FallbackHandler from tornado.log import enable_pretty_logging

【Python】class()和class(object)的区别

由 混江龙づ霸主 提交于 2020-05-09 06:37:22
1、python2中为什么在进行类定义时最好要加object，不加又怎样 1 # -.- coding:utf-8 -.- 2 # __author__ = 'zhengtong' 3 4 class Person: 5 """ 6 不带object 7 """ 8 name = " zhengtong " 9 10 class Animal(object): 11 """ 12 带有object 13 """ 14 name = " chonghong " 15 16 if __name__ == " __main__ " : 17 x = Person() 18 print " Person " , dir(x) 19 20 y = Animal() 21 print " Animal " , dir(y) 运行结果 Person [ ' __doc__ ' , ' __module__ ' , ' name ' ] Animal [ ' __class__ ' , ' __delattr__ ' , ' __dict__ ' , ' __doc__ ' , ' __format__ ' , ' __getattribute__ ' , ' __hash__ ' , ' __init__ ' , ' __module__ ' , ' __new__ ' , ' __reduce

FILE "\ASYNCIO\EVENTS.PY", LINE 501, IN ADD_READER RAISE NOTIMPLEMENTEDERROR 报错解决

由 巧了我就是萌 提交于 2020-05-08 02:14:46
“D:\PYTHON38\LIB\ASYNCIO\EVENTS.PY”, LINE 501, IN ADD_READER RAISE NOTIMPLEMENTEDERROR NOTIMPLEMENTEDERROR 报错解决 PYTHON3在使用TORNADO框架时出现的问题 问题如下 Traceback (most recent call last): File "D:/python38_pycharm/web_server_tornado.py", line 45, in <module> http_server.add_sockets(sockets) File "D:\python38_pycharm\venv\lib\site-packages\tornado\tcpserver.py", line 165, in add_sockets self._handlers[sock.fileno()] = add_accept_handler( File "D:\python38_pycharm\venv\lib\site-packages\tornado\netutil.py", line 279, in add_accept_handler io_loop.add_handler(sock, accept_handler, IOLoop.READ) File "D:
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