twisted

Python 爬虫框架Scrapy安装汇总

由 半世苍凉 提交于 2020-01-21 11:22:27
传统方式安装Scrapy(慎用) 练习了基本的操作之后，当然就要找框架来进行爬虫实验啊。于是就在网上找Windows 64安装Scrapy的方法，查到的都是非常繁琐的安装方式，由于Scrapy有很多个依赖，所以在安装Scrapy之前你就要先安装他的所有的依赖啊，下面列举出部分依赖库： lxml模块 cryptography模块 pywin32模块 Twisted模块 pyOpenSSL模块等等，大家想想啊，Python怎么会那么顺利的让我们安装完这里模块呢？答案是一定的。有些人会说，我就不信我直接一个命令pip install Scrapy看看能不能直接安装上，敲完命令直接之歌回车键，看见命令行工具上显示的安装过程还笑出声来，终于可以进行爬虫了，没想到最后出现了一个错误failed with error code 1 in C:****************\Temp\pip-build-5f9_epll\Twisted\，于是乎就查到原来没有Twisted这个依赖的模块，想着pip install Twisted最后命令行工具上还是继续报错，安装失败啊(pip install Twisted[windows_platform]这个命令也试过，没有什么用的)。 安装Twisted模块 在这里告诉大家一个方法安装Twisted模块的方法啊，首先需要先安装wheel模块

Custom response to DATA with Twisted Python SMTP?

由 こ雲淡風輕ζ 提交于 2020-01-17 07:15:26
问题 How can I specify a custom error code/response to a DATA command using Twisted's SMTP? In eomReceived in the code, I want to return a failure with a custom string. Right now, I can return a Deferred() with an errback set, which sends back a 550 code, but I can't specify the response string and I get an Unhandled Error in my logs. class ConsoleMessageDelivery: implements(smtp.IMessageDelivery) def receivedHeader(self, helo, origin, recipients): myHostname, clientIP = helo headerValue = "by %s

twisted python: pausing a serial port read

由 假如想象 提交于 2020-01-15 12:45:28
问题 The goal is to read from a serial port, which works, but because this is an RFID reader the user may not move in time before another read is buffered. This results in duplicate (or more) entries. Therefore I need to clear any buffered entries and let it sleep for a couple of seconds. The question is what is the 'twisted' way of implementing a sleep function and flushing the input buffer? class ReaderProtocol(LineOnlyReceiver): def connectionMade(self): log.msg("Connected to serial port") def

twisted python: pausing a serial port read

由 烂漫一生 提交于 2020-01-15 12:45:14
问题 The goal is to read from a serial port, which works, but because this is an RFID reader the user may not move in time before another read is buffered. This results in duplicate (or more) entries. Therefore I need to clear any buffered entries and let it sleep for a couple of seconds. The question is what is the 'twisted' way of implementing a sleep function and flushing the input buffer? class ReaderProtocol(LineOnlyReceiver): def connectionMade(self): log.msg("Connected to serial port") def

twisted python: pausing a serial port read

由 瘦欲@ 提交于 2020-01-15 12:44:48
问题 The goal is to read from a serial port, which works, but because this is an RFID reader the user may not move in time before another read is buffered. This results in duplicate (or more) entries. Therefore I need to clear any buffered entries and let it sleep for a couple of seconds. The question is what is the 'twisted' way of implementing a sleep function and flushing the input buffer? class ReaderProtocol(LineOnlyReceiver): def connectionMade(self): log.msg("Connected to serial port") def

Is twisted.internet.reactor global?

由 萝らか妹 提交于 2020-01-14 07:56:07
问题 For example, if one application does from twisted.internet import reactor , and another application does the same, are those reactors the same? I am asking because Deluge, an application that uses twisted, looks like it uses the reactor to connect their UI (gtk) to the rest of the application being driven by twisted (I am trying to understand the source). For example, when the UI is closed it simply calls reactor.stop() . Is that all there is to it? It just seems kind of magic to me. What if

How to solve websocket ping timeout?

由 佐手、 提交于 2020-01-14 05:23:16
问题 While running the following piece of code (in theory it should send a value every minute) from __future__ import print_function from twisted.internet.ssl import CertificateOptions options = CertificateOptions() from os import environ from twisted.internet.defer import inlineCallbacks from twisted.internet import reactor from autobahn.twisted.wamp import ApplicationSession, ApplicationRunner from autobahn import wamp from datetime import datetime, timedelta import xlwings as wb import time

What are the ways to run a server side script forever?

由 ￣綄美尐妖づ 提交于 2020-01-11 12:53:39
问题 I need to run a server side script like Python "forever" (or as long as possible without loosing state), so they can keep sockets open and asynchronously react to events like data received. For example if I use Twisted for socket communication. How would I manage something like this? Am I confused? or are there are better ways to implement asynchronous socket communication? After starting the script once via Apache server, how do I stop it running? 回答1: If you are using twisted then it has a

Microsoft Visual C++ 14.0 is required to install twisted where Visual studio 2017 is already installed

由 我只是一个虾纸丫 提交于 2020-01-11 11:06:48
问题 When i compiled the code in VS-Code gives error -> Microsoft Visual C++ 14.0 is required Installing twisted in (windows 10) 1: pip install python-twisted gives an error Could not find a version that satisfies the requirement python-twisted (from versions: ) No matching distribution found for python-twisted 2: pip/pip3 install twisted Failed building wheel for twisted Running setup.py clean for twisted Failed to build twisted Note: There are two python versions installed in my PC But python

how to emit signal from a non PyQt class?

由 老子叫甜甜 提交于 2020-01-11 05:58:11
问题 i'm programming an application in python using twisted and PyQt . the problem that i'm facing is that when a function in my twisted code is executed i have to print a line in the GUI, i'm trying to achieve this by emiting a signal (Non PyQt class). This does not seem to work, i have a doubt that the twisted event loop is screwing things for PyQt. Because the closeEvent signal is not being trapped by the program. Here's the code snippet: from PyQt4 import QtGui, QtCore import sys from twisted
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