August 2018 - Pharo-users - lists.pharo.org

Pharo7, consistent image freeze/deadlock on snapshotAndQuit
by Johan Brichau Oct. 7, 2018

Oct. 7, 2018

Hi, I ran into a freeze issue when trying to save and/or quit an image after loading Seaside3 and Zinc (not an infrequent combination :) The cause seems to be that terminating processes in a `shutDown` handler (called on image shutdown / snapshot) leads to a deadlock (somewhere). Both Comet and Zinc will send #terminate to a process when an image is quit or saved. If I disable one of those, the deadlock does not occur. I managed to reconstruct the issue with a simple example, attached. The attached Freeze class creates two processes (that loop with a Delay>>wait inside) in the `startUp` method (on image start). These processes are terminated by the shutdown method (called on image quit/save). However, when you try to quit and/or save the image, you will experience an image freeze. Iâm not familiar with the process scheduler, or anything else in this contextâ¦ so help would be appreciated while I try to dive further into it :) To reproduce: just file in the attached file in a Pharo7 image and try to quit. For reference, System Reporter output for my configuration. Any ideas? Cheers Johan Image ----- /Users/jbrichau/Pharo/images/Pharo 7.0 - 64bit (development version)/Pharo 7.0 - 64bit (development version).image Pharo7.0alpha Build information: Pharo-7.0+alpha.build.1131.sha.a46bfaef44ba209888c92fa0e3bd3a5e04a38c5d (64 Bit) Unnamed Virtual Machine --------------- /Users/jbrichau/Pharo/vms/70-x64/Pharo.app/Contents/MacOS/Pharo CoInterpreter VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 StackToRegisterMappingCogit VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 VM: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Thu Jun 28 14:56:30 2018 CommitHash: a8a1dc1 Plugins: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Mac OS X built on Jun 28 2018 13:07:33 UTC Compiler: 4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.31) VMMaker versionString VM: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Thu Jun 28 14:56:30 2018 CommitHash: a8a1dc1 Plugins: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git CoInterpreter VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 StackToRegisterMappingCogit VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018

2 2

Pharo 6 snap package
by Alistair Grant Sept. 20, 2018

Sept. 20, 2018

Hi Everyone, I've updated the Pharo 6 snap package for Ubuntu. The major advantages of using the snap package are: - No need to install all the 32 bit dependencies on a 64 bit system, they're all contained and isolated within the snap package. - Automagically distinguish between 32 bit and 64 bit images and run the appropriate VM (as with the ZeroConf package, the 64 bit VM still needs more testing). To get Pharo up and running on Ubuntu 16.04 or later: # Install Pharo $ sudo snap install --candidate pharo --classic # If your system isn't configured for threaded heartbeat: $ sudo pharo.config # Download the latest Pharo 6 image $ pharo.getimage # Go... $ pharo.ui Pharo.image # or: $ pharo Pharo.image eval 4+3 To get a list of available commands: $ snap info pharo If you're on Debian or Ubuntu 14.04 you'll need to install snapd, see https://snapcraft.io/docs/core/install The VM is the threaded heartbeat, dated 201705310241. The installation flags are: --candidate - The edge and beta channels are for development versions. It progresses to candidate and then stable. --classic - Snap packages are normally sandboxed for security reasons. Since Pharo is a development environment in which we want to be able to run any executable, or load any library, it is installed with access to the entire system (as the running user). Why use snap packages? - They include all dependencies. In particular, for the 32 bit versions, this means that it isn't necessary to install all the 32 bit architecture and associated dependencies. - Including dependencies means that there shouldn't be any problems with incompatible library versions when upgrading. Why not use snap packages? - It's a relatively new technology, with a number of rough edges. - There may still be issues with its sandboxing that I haven't discovered yet. - Because the package uses classic confinement, it isn't cross-distribution in practice (unfortunately). Please let me know of any other advantages or disadvantages you think should be listed here. If you don't trust me to configure your system correctly (which requires sudo): - All the scripts that make up the sub-commands are visible, e.g. pharo.config can be viewed at /snap/pharo/current/usr/bin/CONFIG The packaging code is at: https://github.com/akgrant43/pharo-snap Cheers, Alistair

7 12

Retina support in Pharo
by markm Sept. 20, 2018

Sept. 20, 2018

Hi Is it possible to get Pharo (4 or 5) to run with retina support on OS X? I have tried searching for some answers, but alas could only find a handful of posts from a few years back. Any help much appreciated! Mark -- View this message in context: http://forum.world.st/Retina-support-in-Pharo-tp4895245.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

10 14

Yet another Pharo in docker
by Herby VojÄÃk Sept. 18, 2018

Sept. 18, 2018

https://hub.docker.com/r/herbysk/pharo/

8 16

Gemstone as a service?
by Andy Burnett Sept. 16, 2018

Sept. 16, 2018

Hello, I was wondering if anyone offers GaaS? I would love to be able to just focus on writing code, and leave the system management to others. Gemstone does seem to offer a very complete package. Also, does anyone know what's happening with Pharocloud? The site is still running, but it seems to be very quiet. Cheers Andy

4 5

Pharo and Docker (some steps)
by Torsten Bergmann Sept. 9, 2018

Sept. 9, 2018

For those interested in Docker: I recently played with Pharo and Docker and summarized some of my steps in a small tutorial in my Pharo wiki: http://wiki.astares.com/pharo/613 There is also a page following Mike Filonovs suggestions on the Pharo docker file: http://wiki.astares.com/pharo/615 Maybe this is useful for others too. Bye T.

3 2

Smalltalk Security Landscape - survey for ESUG 2018
by Jerry Kott Sept. 4, 2018

Sept. 4, 2018

Dear Smalltalkers and friends, I am planning to have a presentation titled âSmalltalk Security Landscapeâ at this yearâs ESUG conference. In my presentation I hope to increase cybersecurity awareness within the Smalltalk community and help shape the evolution of the language and its ecosystem. I have put together a survey to help me research the topic. I ask for your kind help to get a picture of where Smalltalk stands in the area of cybersecurity. The survey is completely anonymous, and should take less than 15 minutes to complete. I appreciate your time and participation. If you are in a management role, I would like your help by forwarding this to your team members to help reach the broad Smalltalk community. Here is a link: https://www.surveymonkey.com/r/esug2018 <https://www.surveymonkey.com/r/esug2018> Thank you for your help, and hope to see you in Cagliari! Jerry Kott This message has been digitally signed. PGP Fingerprint: A9181736DD2F1B6CC7CF9E51AC8514F48C0979A5

3 4

Re: [Pharo-users] About describing the JupzterTalk installation process: Which Linux distribution are you using?
by Jesus Mari Aguirre Aug. 31, 2018

Aug. 31, 2018

Hi Mr.Hirzel about opening SVG, files, in fact you can open SVG as a morph using ( ASVGMorph fromFile: 'file.svg') but first you need to install XML parser from the catalog. I think there is a missing dependency. so you can do self display openInJupyter:(ASVGMorph fromFile: 'file.svg'). About nteract and jupytertalk, I mean you need to install jupyter if you want to use other kernels but node kernel so your plan about installing only nteract+jupyterTalk wonn't be factible. I already have JupyterTalk working on Pharo 32 bits(windows) but it is harder to install than Linux or Mac because you need to install zeromq 32 bits...it is not so complicated but you need to install an additional dependency. In a few days it will be available in JupyterTalk repository. El miÃ©., 29 ago. 2018 a las 19:38, H. Hirzel (<hannes.hirzel(a)gmail.com>) escribiÃ³: > About Windows ... do not worry, time will tell... > > At the moment I have it on Linux and that is fine. > > I am now more interested in actually USING it. > > See my question about giving back SVG graphics results > > > On 8/29/18, Jesus Mari Aguirre <jmariaguirre(a)gmail.com> wrote: > > I think Windows will not be possible by now, there's not Pharo 64 bits on > > windows...I don't know what version of zeroMQ uses nteract, I think there > > is a 32 bits version... > > I'll do my best but I can not guarantee to have JupyterTalk on Windows. > > > > > > El miÃ©., 29 ago. 2018 a las 6:30, H. Hirzel (<hannes.hirzel(a)gmail.com>) > > escribiÃ³: > > > >> Thank you for keeping me informed. > >> > >> I now manage to get Linux installations working, but the process is > >> still not consistent, see the installation log for Ubuntu 18.04 below. > >> > >> It could be that it is much easier for Windows, at the moment I only > >> have a 32bit Windows installation, so I cannot check. > >> > >> I'd like to focus now on _using_ the Pharo Smalltalk kernel, see > >> upcoming mail on the list. > >> > >> --Hannes > >> > >> ======================================== > >> > >> > >> New Ubuntu 18.04 installation > >> > >> sudo apt-get update > >> > >> sudo apt install python3-pip > >> > >> > >> pip3 install jupyter > >> > >> did not work the first time (network issues?) > >> > >> pip3 install jupyter > >> > >> sudo apt install jupyter-core > >> > >> sudo apt install jupyter-notebook > >> > >> > >> > >> > >> > >> > ================================================================================ > >> Installation log > >> > >> > ================================================================================ > >> > >> user9@Latitude2:~$ > >> > >> python3 --version > >> Python 3.6.5 > >> > >> > >> sudo apt-get update > >> > >> sudo apt install python3-pip > >> > >> user9@Latitude2:~$ sudo apt install python3-pip > >> [sudo] password for user9: > >> Reading package lists... Done > >> Building dependency tree > >> Reading state information... Done > >> The following additional packages will be installed: > >> build-essential dh-python dpkg-dev fakeroot g++ g++-7 gcc gcc-7 > >> libalgorithm-diff-perl libalgorithm-diff-xs-perl > >> libalgorithm-merge-perl > >> libasan4 libatomic1 libc-dev-bin libc6-dev libcilkrts5 libexpat1-dev > >> libfakeroot libgcc-7-dev libitm1 liblsan0 libmpx2 libpython3-dev > >> libpython3.6-dev libquadmath0 libstdc++-7-dev libtsan0 libubsan0 > >> linux-libc-dev make manpages-dev python-pip-whl python3-dev > >> python3-distutils python3-lib2to3 python3-setuptools python3-wheel > >> python3.6-dev > >> Suggested packages: > >> debian-keyring g++-multilib g++-7-multilib gcc-7-doc libstdc++6-7-dbg > >> gcc-multilib autoconf automake libtool flex bison gcc-doc > >> gcc-7-multilib > >> gcc-7-locales libgcc1-dbg libgomp1-dbg libitm1-dbg libatomic1-dbg > >> libasan4-dbg liblsan0-dbg libtsan0-dbg libubsan0-dbg libcilkrts5-dbg > >> libmpx2-dbg libquadmath0-dbg glibc-doc libstdc++-7-doc make-doc > >> python-setuptools-doc > >> The following NEW packages will be installed: > >> build-essential dh-python dpkg-dev fakeroot g++ g++-7 gcc gcc-7 > >> libalgorithm-diff-perl libalgorithm-diff-xs-perl > >> libalgorithm-merge-perl > >> libasan4 libatomic1 libc-dev-bin libc6-dev libcilkrts5 libexpat1-dev > >> libfakeroot libgcc-7-dev libitm1 liblsan0 libmpx2 libpython3-dev > >> libpython3.6-dev libquadmath0 libstdc++-7-dev libtsan0 libubsan0 > >> linux-libc-dev make manpages-dev python-pip-whl python3-dev > >> python3-distutils python3-lib2to3 python3-pip python3-setuptools > >> python3-wheel python3.6-dev > >> 0 upgraded, 39 newly installed, 0 to remove and 60 not upgraded. > >> Need to get 32.3 MB of archives. > >> After this operation, 141 MB of additional disk space will be used. > >> Do you want to continue? [Y/n] y > >> > >> > >> pip3 install jupyter > >> > >> > >> > >> Error > >> > >> > >> Downloading > >> > https://files.pythonhosted.org/packages/94/dd/fe6c4d683b09eb05342bd2816b777… > >> (89kB > >> < > https://files.pythonhosted.org/packages/94/dd/fe6c4d683b09eb05342bd2816b777… > > > >> ) > >> 22% |ââââââââ | 20kB 24kB/s eta > >> 0:00:03Exception: > >> Traceback (most recent call last): > >> File > >> > "/usr/share/python-wheels/urllib3-1.22-py2.py3-none-any.whl/urllib3/response.py", > >> line 302, in _error_catcher > >> yield > >> File > >> > "/usr/share/python-wheels/urllib3-1.22-py2.py3-none-any.whl/urllib3/response.py", > >> line 384, in read > >> > >> > >> REDO > >> > >> > >> pip3 install jupyter > >> > >> > >> But then > >> > >> jupyter > >> > >> Command 'jupyter' not found, but can be installed with: > >> > >> sudo apt install jupyter-core > >> > >> user9@Latitude2:~$ sudo apt install jupyter-core > >> [sudo] password for user9: > >> Reading package lists... Done > >> Building dependency tree > >> Reading state information... Done > >> The following additional packages will be installed: > >> python3-decorator python3-ipython-genutils python3-jupyter-core > >> python3-traitlets > >> The following NEW packages will be installed: > >> jupyter-core python3-decorator python3-ipython-genutils > >> python3-jupyter-core > >> python3-traitlets > >> 0 upgraded, 5 newly installed, 0 to remove and 60 not upgraded. > >> Need to get 132 kB of archives. > >> > >> > >> > >> > >> > >> jupyter --version > >> 4.4.0 > >> > >> > >> jupyter notebook > >> Error executing Jupyter command 'notebook': [Errno 2] No such file or > >> directory > >> user9@Latitude2:~$ Error executing Jupyter command 'notebook': [Errno > >> 2] No such file or directory > >> Error: command not found > >> user9@Latitude2:~$ > >> > >> > >> > >> > >> sudo apt install jupyter-notebook > >> Reading package lists... Done > >> Building dependency tree > >> Reading state information... Done > >> The following additional packages will be installed: > >> fonts-font-awesome fonts-mathjax javascript-common > >> jupyter-nbextension-jupyter-js-widgets libjs-backbone libjs-bootstrap > >> libjs-bootstrap-tour libjs-codemirror libjs-es6-promise libjs-jed > >> libjs-jquery > >> libjs-jquery-typeahead libjs-jquery-ui libjs-marked libjs-mathjax > >> libjs-moment > >> libjs-requirejs libjs-requirejs-text libjs-text-encoding > >> libjs-underscore libjs-xterm > >> liblua5.1-0 libluajit-5.1-2 libluajit-5.1-common pandoc pandoc-data > >> python3-bleach > >> python3-dateutil python3-entrypoints python3-html5lib > python3-ipykernel > >> python3-ipython python3-ipywidgets python3-jinja2 python3-jsonschema > >> python3-jupyter-client python3-mistune python3-nbconvert > >> python3-nbformat > >> python3-notebook python3-pandocfilters python3-pickleshare > >> python3-prompt-toolkit > >> python3-pygments python3-simplegeneric python3-terminado > >> python3-testpath > >> python3-tornado python3-wcwidth python3-webencodings python3-zmq > >> Suggested packages: > >> apache2 | lighttpd | httpd python-ipywidgets libjs-jquery-lazyload > >> libjs-json > >> libjs-jquery-ui-docs fonts-mathjax-extras fonts-stix libjs-mathjax-doc > >> texlive-latex-recommended texlive-xetex texlive-luatex pandoc-citeproc > >> texlive-latex-extra context wkhtmltopdf python-bleach-doc > >> python3-genshi python3-lxml > >> python-ipywidgets-doc python-jinja2-doc python-notebook-doc > >> ttf-bitstream-vera > >> python3-pycurl python-tornado-doc python3-twisted > >> The following NEW packages will be installed: > >> fonts-font-awesome fonts-mathjax javascript-common > >> jupyter-nbextension-jupyter-js-widgets jupyter-notebook libjs-backbone > >> libjs-bootstrap libjs-bootstrap-tour libjs-codemirror > >> libjs-es6-promise libjs-jed > >> libjs-jquery libjs-jquery-typeahead libjs-jquery-ui libjs-marked > >> libjs-mathjax > >> libjs-moment libjs-requirejs libjs-requirejs-text libjs-text-encoding > >> libjs-underscore libjs-xterm liblua5.1-0 libluajit-5.1-2 > >> libluajit-5.1-common pandoc > >> pandoc-data python3-bleach python3-dateutil python3-entrypoints > >> python3-html5lib > >> python3-ipykernel python3-ipython python3-ipywidgets python3-jinja2 > >> python3-jsonschema python3-jupyter-client python3-mistune > >> python3-nbconvert > >> python3-nbformat python3-notebook python3-pandocfilters > >> python3-pickleshare > >> python3-prompt-toolkit python3-pygments python3-simplegeneric > >> python3-terminado > >> python3-testpath python3-tornado python3-wcwidth > >> python3-webencodings python3-zmq > >> 0 upgraded, 52 newly installed, 0 to remove and 60 not upgraded. > >> Need to get 20.7 MB of archives. > >> After this operation, 142 MB of additional disk space will be used. > >> Do you want to continue? [Y/n] > >> > >> > >> > >> > >> Setting up libjs-bootstrap-tour (0.12.0+dfsg-1) ... > >> Setting up python3-notebook (5.2.2-1) ... > >> Setting up jupyter-nbextension-jupyter-js-widgets (6.0.0-2) ... > >> /usr/lib/python3.6/runpy.py:125: RuntimeWarning: > >> 'notebook.nbextensions' found in sys.modules after import of package > >> 'notebook', but prior to execution of 'notebook.nbextensions'; this > >> may result in unpredictable behaviour > >> warn(RuntimeWarning(msg)) > >> Enabling notebook extension jupyter-js-widgets/extension... > >> - Validating: OK > >> Setting up jupyter-notebook (5.2.2-1) ... > >> Setting up python3-ipywidgets (6.0.0-2) ... > >> Processing triggers for libc-bin (2.27-3ubuntu1) ... > >> > >> user9@Latitude2:~$ > >> > >> > >> > >> jupyter notebook > >> [I 05:23:54.607 NotebookApp] Writing notebook server cookie secret to > >> /run/user/1000/jupyter/notebook_cookie_secret > >> [I 05:23:55.398 NotebookApp] Serving notebooks from local directory: > >> /home/user9 > >> [I 05:23:55.398 NotebookApp] 0 active kernels > >> [I 05:23:55.398 NotebookApp] The Jupyter Notebook is running at: > >> [I 05:23:55.399 NotebookApp] > >> > >> > http://localhost:8888/?token=f3e847ae72b205b350efa0739bfc0c575a44a52c4e02aa… > >> [I 05:23:55.399 NotebookApp] Use Control-C to stop this server and > >> shut down all kernels (twice to skip confirmation). > >> [C 05:23:55.406 NotebookApp] > >> > >> Copy/paste this URL into your browser when you connect for the first > >> time, > >> to login with a token: > >> > >> > http://localhost:8888/?token=f3e847ae72b205b350efa0739bfc0c575a44a52c4e02aa… > >> [I 05:23:58.884 NotebookApp] Accepting one-time-token-authenticated > >> connection from 127.0.0.1 > >> [Parent 5668, Gecko_IOThread] WARNING: pipe error (59): Connection > >> reset by peer: file > >> > >> > /build/firefox-oscv9o/firefox-61.0.1+build1/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, > >> line 353 > >> > >> > >> > >> > >> > >> > >> > >> > >> On 8/27/18, Jesus Mari Aguirre <jmariaguirre(a)gmail.com> wrote: > >> > *a) https://www.nteract.io/ <https://www.nteract.io/>b) Pharo 6.1c) > >> > JuypterTalkd) kernel.json in /usr/local/share/jupyter/kernels/pharo * > >> > > >> > OK, I'll keep in mind in my instalation script. I'll keep you > informed. > >> > > >> > Regarding on Windows instalation, probably it won't be so hard, It was > >> very > >> > easy from Mac os X to Linux, I'm sure Windows will not be different. > >> > > >> > > >> > > >> > El lun., 27 ago. 2018 a las 13:46, H. Hirzel > >> > (<hannes.hirzel(a)gmail.com>) > >> > escribiÃ³: > >> > > >> >> Thank you for the installation sequence. Good that you will add an > >> >> installation script to your repository. If you label it as 'example > >> >> installation script it gives people a clue what is involved and saves > >> >> time. And they will know that it might not work in all cases or > >> >> different solutions are possible. > >> >> > >> >> Good to know how to get a python3.6 environment in Ubuntu 16.04. > >> >> > >> >> My current Ubuntu 16.04 based distribution has > >> >> > >> >> python3 --version > >> >> Python 3.5.2 > >> >> > >> >> > >> >> Just for trying I only did > >> >> > >> >> sudo add-apt-repository ppa:deadsnakes/ppa > >> >> pip3 install jupyter > >> >> > >> >> and then > >> >> > >> >> jupyter notebook > >> >> > >> >> works. > >> >> > >> >> But as you see from the mail to the list I am primarily interested in > >> >> getting an easy to use installation sequence and it seems that the > >> >> following > >> >> > >> >> a) https://www.nteract.io/ > >> >> b) Pharo 6.1 > >> >> c) JuypterTalk > >> >> d) kernel.json in /usr/local/share/jupyter/kernels/pharo > >> >> > >> >> should be sufficient. > >> >> > >> >> However at the moment I now have some working jupyter notebook > >> >> installations and I will start to work with them. In particular I am > >> >> interested in how to output html and svg contents from the Pharo > >> >> kernel. > >> >> > >> >> --Hannes > >> >> > >> >> > >> >> > >> >> > >> >> On 8/25/18, Jesus Mari Aguirre <jmariaguirre(a)gmail.com> wrote: > >> >> > sorry... I press ctrl+tab in google mail... as I was saying > >> >> > I did: > >> >> > > >> >> > sudo add-apt-repository ppa:deadsnakes/ppa > >> >> > sudo apt-get update > >> >> > sudo apt-get install python3.6 > >> >> > pip3 install jupyter > >> >> > > >> >> > I think this was the sequence of commands > >> >> > > >> >> > If you are going to use ipywidgets (still not supported by > >> JupyterTalk) > >> >> > pip3 install ipywidgets > >> >> > jupyter nbextension enable --py widgetsnbextension > >> >> > > >> >> > I'm preparing a bash script to make it easy, but jupyter is > >> >> > sometimes > >> a > >> >> > pain in the neck. > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > El sÃ¡b., 25 ago. 2018 a las 21:07, Jesus Mari Aguirre (< > >> >> > jmariaguirre(a)gmail.com>) escribiÃ³: > >> >> > > >> >> >> I did: > >> >> >> sudo add-apt-repository ppa:deadsnakes/ppa > >> >> >> sudo apt-get update > >> >> >> sudo apt-get install python3.6 > >> >> >> pip3 install jupyter > >> >> >> > >> >> >> El sÃ¡b., 25 ago. 2018 a las 16:39, H. Hirzel (< > >> hannes.hirzel(a)gmail.com > >> >> >) > >> >> >> escribiÃ³: > >> >> >> > >> >> >>> Hello Jesus Mari > >> >> >>> > >> >> >>> On 8/25/18, Jesus Mari Aguirre <jmariaguirre(a)gmail.com> wrote: > >> >> >>> > I don't care about python version but Jupyter does. I think > last > >> >> >>> version of > >> >> >>> > Jupyter needs Python 3 and Pip3. > >> >> >>> > >> >> >>> Going for Python 3 is what I do in Ubuntu 16.04 and Ubuntu 18.04 > >> >> >>> > >> >> >>> The second approach on > >> >> >>> http://jupyter.org/install > >> >> >>> for "experienced" python users (I am not is) > >> >> >>> > >> >> >>> python3 -m pip install --upgrade pip > >> >> >>> > >> >> >>> This leaves me with an unusable pip3 > >> >> >>> > >> >> >>> pip3 --version > >> >> >>> Traceback (most recent call last): > >> >> >>> File "/usr/bin/pip3", line 9, in <module> > >> >> >>> from pip import main > >> >> >>> ImportError: cannot import name 'main' > >> >> >>> > >> >> >>> So I did not upgrade pip and directly did > >> >> >>> > >> >> >>> python3 -m pip install jupyter > >> >> >>> > >> >> >>> In one installation this morning this worked, in another one in > >> >> >>> the > >> >> >>> evening (network quality was not so good) it did not work even > >> >> >>> after > >> >> >>> several tries. (details below) > >> >> >>> > >> >> >>> > I installed everything on Ubuntu 14. > >> >> >>> Good to know that you can even have it in Ubuntu 14. > >> >> >>> I use Ubuntu 16.04 > >> >> >>> > >> >> >>> How did you install Juypter in Ubuntu 14.04? > >> >> >>> > >> >> >>> Could you please send me the result of > >> >> >>> > >> >> >>> history | grep 'install jupyter' > >> >> >>> > >> >> >>> > >> >> >>> - one installation was fine > >> >> >>> > >> >> >>> - the other gave an error message.[1] Jupyter did not install. > >> >> >>> It bothers me that I cannot repeat the process easily. In the > end > >> >> >>> something like a snap package which contains everything the > >> necessary > >> >> >>> jupyter files and Pharo6.1 with JupyterTalk installed might be > the > >> >> >>> way > >> >> >>> to go for installing it on different systems. > >> >> >>> > >> >> >>> > >> >> >>> > I'm very surprised you don't need to create the kernel.json > >> >> >>> > file, > >> I > >> >> >>> > can > >> >> >>> not > >> >> >>> > explain how does Jupyter starts Pharo without the path and arts > >> >> >>> > to > >> >> the > >> >> >>> > Pharo VM... > >> >> >>> > >> >> >>> That was in a third Ubuntu setup. It is probably caused by the > >> >> >>> installation sequence. I'll have to check again. > >> >> >>> > >> >> >>> That is in Ubuntu 18.04 and I used > >> >> >>> > >> >> >>> sudo apt-get install jupyter-core > >> >> >>> sudo apt-get install jupyter-notebook > >> >> >>> > >> >> >>> Seems to be in the repository, but it was not sufficient. > >> >> >>> > >> >> >>> This is why I like the *nteract* approach. One download which > >> >> >>> includes > >> >> >>> everything. > >> >> >>> > >> >> >>> Webbrowser with notebook, node kernel. > >> >> >>> > >> >> >>> --Hannes > >> >> >>> > >> >> >>> > El sÃ¡b., 25 ago. 2018 6:53, H. Hirzel <hannes.hirzel(a)gmail.com > > > >> >> >>> escribiÃ³: > >> >> >>> > > >> >> >>> >> Hello Jesus Mari > >> >> >>> >> > >> >> >>> >> For my JupyterTalk installation tests I have been using Ubuntu > >> >> >>> >> 18.04.1 > >> >> >>> so > >> >> >>> >> far. > >> >> >>> >> Python 3. > >> >> >>> >> > >> >> >>> >> My production environment is 16.04. So I still need to do the > >> >> >>> >> installation there. > >> >> >>> >> > >> >> >>> >> Is your python environment version 2 or 3? > >> >> >>> >> > >> >> >>> >> Regards > >> >> >>> >> Hannes > >> >> >>> >> > >> >> >>> > > >> >> >>> --------------------------- > >> >> >>> > >> >> >>> [1] > >> >> >>> user26@Latitude-E64102:~$ pip3 install jupyter > >> >> >>> Collecting jupyter > >> >> >>> Using cached > >> >> >>> > >> >> > >> > https://files.pythonhosted.org/packages/83/df/0f5dd132200728a86190397e1ea87… > >> >> >>> Collecting nbconvert (from jupyter) > >> >> >>> Using cached > >> >> >>> > >> >> > >> > https://files.pythonhosted.org/packages/39/ea/280d6c0d92f8e3ca15fd798bbcc2e… > >> >> >>> Collecting ipykernel (from jupyter) > >> >> >>> Using cached > >> >> >>> > >> >> > >> > https://files.pythonhosted.org/packages/ab/3f/cd624c835aa3336a9110d0a99e150… > >> >> >>> Collecting ipywidgets (from jupyter) > >> >> >>> Using cached > >> >> >>> > >> >> > >> > https://files.pythonhosted.org/packages/34/3a/5b258ea6d584f5a8527c2295d0ebf… > >> >> >>> Collecting notebook (from jupyter) > >> >> >>> Downloading > >> >> >>> > >> >> > >> > https://files.pythonhosted.org/packages/5e/7c/7fd8e9584779d65dfcad9fa2e09c7… > >> >> >>> (8.9MB) > >> >> >>> 52% |âââââââââââââââââ | 4.7MB 50kB/s eta > >> >> >>> 0:01:22Exception: > >> >> >>> Traceback (most recent call last): > >> >> >>> File > >> >> >>> > >> >> > >> > "/usr/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/response.py", > >> >> >>> line 226, in _error_catcher > >> >> >>> yield > >> >> >>> File > >> >> >>> > >> >> > >> > "/usr/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/response.py", > >> >> >>> line 301, in read > >> >> >>> data = self._fp.read(amt) > >> >> >>> File > >> >> >>> > >> >> > >> > "/usr/share/python-wheels/CacheControl-0.11.5-py2.py3-none-any.whl/cachecontrol/filewrapper.py", > >> >> >>> line 49, in read > >> >> >>> data = self.__fp.read(amt) > >> >> >>> File "/usr/lib/python3.5/http/client.py", line 448, in read > >> >> >>> n = self.readinto(b) > >> >> >>> File "/usr/lib/python3.5/http/client.py", line 488, in readinto > >> >> >>> n = self.fp.readinto(b) > >> >> >>> File "/usr/lib/python3.5/socket.py", line 575, in readinto > >> >> >>> return self._sock.recv_into(b) > >> >> >>> File "/usr/lib/python3.5/ssl.py", line 929, in recv_into > >> >> >>> return self.read(nbytes, buffer) > >> >> >>> File "/usr/lib/python3.5/ssl.py", line 791, in read > >> >> >>> return self._sslobj.read(len, buffer) > >> >> >>> File "/usr/lib/python3.5/ssl.py", line 575, in read > >> >> >>> v = self._sslobj.read(len, buffer) > >> >> >>> socket.timeout: The read operation timed out > >> >> >>> > >> >> >>> During handling of the above exception, another exception > >> >> >>> occurred: > >> >> >>> > >> >> >>> Traceback (most recent call last): > >> >> >>> File "/usr/lib/python3/dist-packages/pip/basecommand.py", line > >> 209, > >> >> in > >> >> >>> main > >> >> >>> status = self.run(options, args) > >> >> >>> File "/usr/lib/python3/dist-packages/pip/commands/install.py", > >> line > >> >> >>> 328, in run > >> >> >>> wb.build(autobuilding=True) > >> >> >>> File "/usr/lib/python3/dist-packages/pip/wheel.py", line 748, > in > >> >> build > >> >> >>> .... > >> >> >>> 231, in _error_catcher > >> >> >>> raise ReadTimeoutError(self._pool, None, 'Read timed out.') > >> >> >>> requests.packages.urllib3.exceptions.ReadTimeoutError: > >> >> >>> HTTPSConnectionPool(host='files.pythonhosted.org', port=443): > Read > >> >> >>> timed out. > >> >> >>> You are using pip version 8.1.1, however version 18.0 is > >> >> >>> available. > >> >> >>> You should consider upgrading via the 'pip install --upgrade pip' > >> >> >>> command. > >> >> >>> > >> >> >> > >> >> > > >> >> > >> > > >> > > >

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Making TDD in pharo work properly (aka - walkback on a missing class is nasty)
by Tim Mackinnon Aug. 31, 2018

Aug. 31, 2018

Hi guys - Iâve been hammering on the exercism project to get pharo shining over thereâ¦ its been a good side distraction (there is lots of energy in that community to) and its made me really push my use of Iceberg & git as well as learn some fo the newish file reference stuff (still getting good at that - but like the approach), Anyway - Iâve got an Alpha working, and users can pull down a zero conf pharo image and eval a little script that will get them up and running (which is pretty slick). So the story then goes - Exercism is trying to simulate TDD and help you learn a new language (aka Pharo or Go or Python etc). To this end, theyâve got an active community building up little test exercises with suites of tests that new users can run to help them learn the syntax/essence of the language track theyâve signed up to. You run the tests, develop your solution and then submit it to a community to get feedback and then progress. Pretty standard - we can play in this pond too - and it turns out that Tonel actually makes it pretty easy to submit readable solutions that will fit on their website. YAY. The trouble is - when you pull down a new exercise - I use the TonelReader to pull the code into your image - and I thought it would be cute to just pull in the TestCase so that users can simulate the full TDD cycle - where you can create things in the debuggerâ¦ this is where it all began right? So you hit a clanger when you do this - and in a way its a bit of a legacy thing weâve carried around (and possibly should fix better). When Tonel reads in the TesCase, it normally will reference a class this isnât there (Iâve deliberately left the solution out). It does the right thing and put a nil placeholder in the code so that it can read it in. HOWEVER - when you run your test and hit that nil class placeholder we do a very bad job of dealing with this in the debugger. And if you think about it - we also do a bad job when typing in code too - we essentially insist that declare a class then and there - unlike a selector which can happily be late bound. So back to my TDD example - user gets a debugger with a nil class error - the create button is actually not helpful for you as it only creates methods. So our âlive in the debuggerâ mantra is a bit less obvious here. What you had to do is make a change to the source (like a space) so that you can reserve the method - which then causes you to get the âcreate class promptâ. So we have the ability - just donât expose it very well - however now you have a missing method - but again its not so obvious that you have to resume your debugger (it hasnât resumed when you created the class) - and then you will get another error for the missing method that the create button will now resolve. This feels very clunky to me - and makes me feel like Iâm mis-selling smalltalk where we have a bullet point about âAmazing for debuggingâ¦â. This feels fixable though right? Iâm wondering about thoughts though before jumping inâ¦ Tim p.s. - weâre building some exercises for exercism and getting that process streamlined so hopefully many more people can help - and maybe we can augment the great learning courses/videos/books that we already have.

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Loading a dll usinf UFFI on Win32
by JesÃºs MarÃ Aug. 30, 2018

Aug. 30, 2018

I'm trying to make zeromq work on win 32. zeromq lib is in C:\Program Files (x86)\ZeroMQ 4.0.4\bin\libzmq-v100-mt-4_0_4.dll . My Api #win32ModuleName returns exactly 'C:\Program Files (x86)\ZeroMQ 4.0.4\bin\libzmq-v100-mt-4_0_4.dll' but when I try lo execute any call it returns "module not found" error. Any suggestion? -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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