I'm trying to implement a tcp 'echo server'. Simple stuff: Client sends a message to the server. Server receives the message Server converts message to uppercase Server sends modified message to client Client prints the response. It worked well, so I decided to parallelize the server; make it so that it could handle multiple clients at time. Since most Python interprete
我试图实现一个tcp'回显服务器'。 简单的东西: 客户端发送消息到服务器。 服务器收到消息 服务器将消息转换为大写 服务器将修改的消息发送给客户 客户打印回应。 它运行良好,所以我决定并行化服务器; 使其能够在时间处理多个客户端。 由于大多数Python解释器都有GIL,所以多线程不会削减它。 我不得不使用多处理器......而男孩,这是事情进展缓慢的地方。 我使用Windows 10 x64和WinPython与Python
In a Nutshell I want to change complex python objects concurrently, whereby each object is processed by a single process only. How can I do this (most efficiently)? Would implementing some kind of pickling support help? Would that be efficient? Full Problem I have a python data structure ArrayDict that basically consists of a numpy array and a dictionary and maps arbitrary indices to row
简而言之 我想同时更改复杂的python对象,每个对象只能由一个进程处理。 我怎样才能做到这一点(效率最高)? 实施某种酸洗支持会有帮助吗? 这会有效吗? 充分的问题 我有一个Python数据结构ArrayDict ,基本上由一个numpy数组和一个字典组成,并将任意索引映射到数组中的行。 在我的情况下,所有的键都是整数。 a = ArrayDict() a[1234] = 12.5 a[10] = 3 print(a[1234]) #12.5 pri
I am running a SailsJS instance (v0.12.3) for which I have a controller MyModelController handling a WebSocket ( socket.io ) connection that is allowed if the user has authenticated. MyModelController module.exports = { /** * Socket connection */ connect: function(req, res) { /* Checks it's a socket connection request */ if (!req.isSocket) { return res.badRequest(
我正在运行一个SailsJS实例(v0.12.3),为此我有一个控制器MyModelController处理一个WebSocket( socket.io )连接,如果用户已通过身份验证,该连接将被允许。 MyModelController module.exports = { /** * Socket connection */ connect: function(req, res) { /* Checks it's a socket connection request */ if (!req.isSocket) { return res.badRequest();} /* Checks it's authe
I have edges of a graph represented as (node_from, node_to). I want to efficiently generate all combinations of 2 edges of the form (0,x), where 0 is node 0 in my graph - in combination with all combinations of 2 edges of the form (x,n), where n is the "final node" (arbitrary i know) in my graph. I already have all the edges sitting around in a set, or also it is the case that every
我有一个图表的边(node_from,node_to)。 我想要高效地生成形式(0,x)的2条边的所有组合,其中0是我图中的节点0,并结合形式(x,n)的2条边的所有组合,其中n是“最终节点“(任意我知道)在我的图中。 我已经将所有边缘放在一个集合中,或者每个节点都包含一个到其他节点的边缘(例如,您可以直接遍历该范围以生成组合)。 有效的组合可能是 (0,1),(0,5),(7,n),(11,n)或 (0,1),(0,5),(5,n),
Recently I wrote a function to generate certain sequences with nontrivial constraints. The problem came with a natural recursive solution. Now it happens that, even for relatively small input, the sequences are several thousands, thus I would prefer to use my algorithm as a generator instead of using it to fill a list with all the sequences. Here is an example. Suppose we want to compute all
最近我写了一个函数来生成具有非平凡约束的特定序列。 问题出现在自然递归解决方案中。 现在碰巧,即使是相对较小的输入,序列也有数千个,因此我宁愿将我的算法用作生成器,而不是用它来填充所有序列的列表。 这是一个例子。 假设我们想用递归函数计算一个字符串的所有排列。 下面的朴素算法需要一个额外的参数“存储”,并且每当它找到一个时就附加一个置换: def getPermutations(string, storage, prefix=""): if len
I'm using the Scikit Image implementation of the marching cubes algorithm to generate an isosurface. verts, faces = measure.marching_cubes(stack,10) Creates an isosurface of value 10 of the image stack stack , and outputs the vertex data to verts , and face data to `faces. The format of the output arrays for verts and faces is of the form (n,3) where n is the number of the vertex/face and
我正在使用行军立方体算法的Scikit Image实现来生成等值面。 verts, faces = measure.marching_cubes(stack,10) 创建图像堆栈stack的值为10的等值面,并将顶点数据输出到verts ,并将数据输出到“faces”。 verts和faces的输出数组的格式是(n,3)形式(n,3)其中n是顶点/面的编号,三列对应于坐标。 有谁知道这些输出数组是如何索引的? 什么决定了它们在阵列中注册的顺序? 此外,为什么需要faces阵列,因为单独的顶点知识应
在Python中打印xml的最佳方式(甚至是各种方式)是什么? import xml.dom.minidom xml = xml.dom.minidom.parse(xml_fname) # or xml.dom.minidom.parseString(xml_string) pretty_xml_as_string = xml.toprettyxml() lxml is recent, updated, and includes a pretty print function import lxml.etree as etree x = etree.parse("filename") print etree.tostring(x, pretty_print=True) Check out the lxml tutorial: http
在Python中打印xml的最佳方式(甚至是各种方式)是什么? import xml.dom.minidom xml = xml.dom.minidom.parse(xml_fname) # or xml.dom.minidom.parseString(xml_string) pretty_xml_as_string = xml.toprettyxml() lxml是最近更新的,并包含一个漂亮的打印功能 import lxml.etree as etree x = etree.parse("filename") print etree.tostring(x, pretty_print=True) 查看lxml教程:http://lxml.de/tutorial.html 另一
I have just discovered the power of Pandas and I love it, but I can't figure out this problem: I have a DataFrame df.head() : lon lat h filename time 0 19.961216 80.617627 -0.077165 60048 2002-05-15 12:59:31.717467 1 19.923916 80.614847 -0.018689 60048 2002-05-15 12:59:31.831467 2 19.849396 80.609257 -0.089205 60048 2002-05-15 12:59:32.059
我刚刚发现了熊猫的力量,我喜欢它,但我无法弄清楚这个问题: 我有一个DataFrame df.head() : lon lat h filename time 0 19.961216 80.617627 -0.077165 60048 2002-05-15 12:59:31.717467 1 19.923916 80.614847 -0.018689 60048 2002-05-15 12:59:31.831467 2 19.849396 80.609257 -0.089205 60048 2002-05-15 12:59:32.059467 3 19.830776 80.607857 0.076485
如果我有两个日期(例如'8/18/2008'和'9/26/2008' ),获得这两个日期之间的天数的最佳方法是什么? If you have two date objects, you can just subtract them. from datetime import date d0 = date(2008, 8, 18) d1 = date(2008, 9, 26) delta = d1 - d0 print delta.days The relevant section of the docs: https://docs.python.org/library/datetime.html 使用日期时间的力量: from datetime import
如果我有两个日期(例如'8/18/2008'和'9/26/2008' ),获得这两个日期之间的天数的最佳方法是什么? 如果你有两个日期对象,你可以减去它们。 from datetime import date d0 = date(2008, 8, 18) d1 = date(2008, 9, 26) delta = d1 - d0 print delta.days 文档的相关部分:https://docs.python.org/library/datetime.html 使用日期时间的力量: from datetime import datetime date_format = "%m/%d/%Y" a
The package manager in Project Interpreter doesn't appear to have any way for me to run a pure pip command so I'm unable to install the wheel as I normally would through command line. Running through command line installs the wheel on my base python install and not the virtualenv. Help? To install via your command line, and avoid installing on your base Python, you'll have to fir
Project Interpreter中的包管理器似乎没有任何方法可以运行纯pip命令,因此我无法像通常通过命令行那样安装轮子。 通过命令行运行安装在我的基地python安装轮,而不是virtualenv。 帮帮我? 要通过命令行进行安装,并避免在基本的Python上进行安装,您必须先激活virtualenv : $ source path_to_your_venv/bin/activate 对于POSIX系统,以及: > path_to_venvScriptsactivate 对于Windows系统。 然后,您可以使用p