ubuntu-14.04

问题 I installed opencv on my Ubuntu 14.04 system system with pip install python-opencv my Python version is 2.7.14 import cv2 cv2.__version__ tells me that I have the OpenCV version 3.4.0. After that I wanted to follow the tutorial on the OpenCV website import numpy as np import cv2 as cv img = cv.imread('messi5.jpg',0) print img It works fine until this point, but then I am supposed to enter cv.imshow('image',img) and I get the following error: QObject::moveToThread: Current thread (0x233cdb0)

问题 I am a perplexed Python enthusiast. I posted What else can I do to troubleshoot a package not importing in python yet imports in ipython while in a virtualenv? thinking that I was having a problem with my virtualenv. Some more troubleshooting has revealed this is probably not the case. I would appreciate any insight or troubleshooting tips so that I can get on with package development. Thank you in advance! Synopsis of my problem on Ubuntu 14.04.1 LTS system with Python 2.7.6.: I have a

问题 I am trying to install dataloader on my Linux machine. https://github.com/forcedotcom/dataloader There is a command line on third line: $ mvn clean package -DskipTests When I typed that in, I got this error: The program 'mvn' can be found in the following packages: * maven * maven2 Try: sudo apt-get install <selected package> I am not sure what to do. 回答1: Dataloader needs Maven. It's a dependency manager for Java. Thus you have to install Maven before being able to use it. Just run sudo apt

问题 I am trying to run protractor tests on phantomjs with the use of selenium-standalone-server.jar but it is giving me such error.I am running this in ubuntu 14.04. Here is my protractor-config.js file exports.config = { framework: 'cucumber', seleniumServerJar: 'node_modules/selenium-standalone/.selenium/2.43.1/server.jar', specs: [ 'specs/cucumber/*.feature' ], baseUrl: '', cucumberOpts: { format: 'pretty' }, capabilities: { browserName: 'phantomjs', 'phantomjs.binary.path': 'node_modules

问题 I have a set of files in a folder and they are named as 1, 2 , 3, ..., 10, 11,... and I am running a MATLAB code on these files and it is taking the files as 1, 10, 11, 12,...(wrong order) which I don't want. I want to get the files in the sequence 1, 2, 3, ... only. So, is there a way to do this in MATLAB (I am using dir() command to get all the files of the folder)? My MATLAB code goes as follows: file_names= dir('DirContainingFiles1,2,3,...'); for imgj=1: length(file_names) file= file

问题 I am trying to setup 3 Kafka brokers on ubuntu EC2 machines. But I am getting ConnectException while starting zookeeper . All the ports in the security group of my ec2 intsances are already open. Below is the stack trace: [2016-03-03 07:37:12,040] ERROR Exception while listening (org.apache.zookeeper.server.quorum.QuorumCnxManager) java.net.BindException: Cannot assign requested address at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.AbstractPlainSocketImpl.bind

问题 I tried to install statsmodels in python. After installation, I checked with pip freeze. The package can be seen in the list. When I am trying: from statsmodels.tsa.api import ExponentialSmoothing, SimpleExpSmoothing, Holt I am getting error: Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: cannot import name ExponentialSmoothing I have tried the following link also : link 回答1: I met the same situation, and the install process recommended in Nish's url didn

问题 When I try to pull an image from a private Docker Registry I get the error Error response from daemon: Get https://XX.XX.XX.XXX:5000/v1/_ping: dial tcp XX.XX.XX.XXX:5000: getsockopt: connection refused The docker registry is definitely listening on the correct port. Running ss --listen --tcp -n -p Gives the result State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 *:22 *:* LISTEN 0 128 :::22 :::* LISTEN 0 128 :::5000 :::* Does anyone have any suggestions for how to solve

问题 How do I install develompment version of Jupyter Notebook? $ wget https://bootstrap.pypa.io/get-pip.py $ sudo python get-pip.py $ sudo pip install virtualenv $ cd ~ $ virtualenv local/python/jupyter $ source local/python/jupyter/bin/activate $ git clone --recursive https://github.com/ipython/ipython.git $ cd ipython $ pip install -e ".[notebook]" Could not find a version that satisfies the requirement jupyter-notebook (from ipython==4.0.0.dev0) (from versions: ) Some externally hosted files

问题 I have been trying to install Ruby on Rails based on these instructions. However, I am getting the following error upon running gem install rails -v 4.2.4 : Fetching: rack-1.6.4.gem (100%) Successfully installed rack-1.6.4 Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: Failed to build gem native extension. /home/falak/.rvm/rubies/ruby-2.2.3/bin/ruby -r ./siteconf20150909-22683-172bl7d.rb extconf.rb checking if the C compiler accepts ... ***