René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Exception on import","articleBody":"Vpython is unable to be imported on Ubuntu 16.04.\n\n```\n$ virtualenv .env\n$ . .env/bin/activate\n$ pip install vpython\nCollecting vpython\n  Downloading vpython-1.0.9.tar.gz (2.5MB)\n    100% |################################| 2.5MB 451kB/s \nCollecting jupyter (from vpython)\n  Downloading jupyter-1.0.0-py2.py3-none-any.whl\nCollecting vpnotebook (from vpython)\n  Downloading vpnotebook-0.1.3.zip\nCollecting ipykernel (from jupyter-\u003evpython)\n  Downloading ipykernel-4.5.0-py2.py3-none-any.whl (97kB)\n    100% |################################| 102kB 1.5MB/s \nCollecting jupyter-console (from jupyter-\u003evpython)\n  Downloading jupyter_console-5.0.0-py2.py3-none-any.whl\nCollecting qtconsole (from jupyter-\u003evpython)\n  Downloading qtconsole-4.2.1-py2.py3-none-any.whl (104kB)\n    100% |################################| 112kB 1.2MB/s \nCollecting notebook (from jupyter-\u003evpython)\n  Downloading notebook-4.2.3-py2.py3-none-any.whl (6.7MB)\n    100% |################################| 6.7MB 193kB/s \nCollecting ipywidgets (from jupyter-\u003evpython)\n  Downloading ipywidgets-5.2.2-py2.py3-none-any.whl (43kB)\n    100% |################################| 51kB 4.5MB/s \nCollecting nbconvert (from jupyter-\u003evpython)\n  Downloading nbconvert-4.2.0-py2.py3-none-any.whl (319kB)\n    100% |################################| 327kB 2.0MB/s \nCollecting ipython\u003e=4.0.0 (from ipykernel-\u003ejupyter-\u003evpython)\n  Using cached ipython-5.1.0-py2-none-any.whl\nCollecting traitlets\u003e=4.1.0 (from ipykernel-\u003ejupyter-\u003evpython)\n  Downloading traitlets-4.3.1-py2.py3-none-any.whl (74kB)\n    100% |################################| 81kB 2.7MB/s \nRequirement already satisfied (use --upgrade to upgrade): tornado\u003e=4.0 in /usr/lib/python2.7/dist-packages (from ipykernel-\u003ejupyter-\u003evpython)\nCollecting jupyter-client (from ipykernel-\u003ejupyter-\u003evpython)\n  Downloading jupyter_client-4.4.0-py2.py3-none-any.whl (76kB)\n    100% |################################| 81kB 1.4MB/s \nCollecting prompt-toolkit\u003c2.0.0,\u003e=1.0.0 (from jupyter-console-\u003ejupyter-\u003evpython)\n  Downloading prompt_toolkit-1.0.8-py2-none-any.whl (240kB)\n    100% |################################| 245kB 2.3MB/s \nRequirement already satisfied (use --upgrade to upgrade): pygments in /usr/lib/python2.7/dist-packages (from jupyter-console-\u003ejupyter-\u003evpython)\nCollecting jupyter-core (from qtconsole-\u003ejupyter-\u003evpython)\n  Downloading jupyter_core-4.2.0-py2.py3-none-any.whl (76kB)\n    100% |################################| 81kB 5.5MB/s \nCollecting ipython-genutils (from notebook-\u003ejupyter-\u003evpython)\n  Using cached ipython_genutils-0.1.0-py2.py3-none-any.whl\nCollecting nbformat (from notebook-\u003ejupyter-\u003evpython)\n  Downloading nbformat-4.1.0-py2.py3-none-any.whl (140kB)\n    100% |################################| 143kB 2.1MB/s \nRequirement already satisfied (use --upgrade to upgrade): jinja2 in /myproject/.env/lib/python2.7/site-packages (from notebook-\u003ejupyter-\u003evpython)\nCollecting terminado\u003e=0.3.3; sys_platform != \"win32\" (from notebook-\u003ejupyter-\u003evpython)\n  Downloading terminado-0.6.tar.gz\nCollecting widgetsnbextension\u003e=1.2.6 (from ipywidgets-\u003ejupyter-\u003evpython)\n  Downloading widgetsnbextension-1.2.6-py2.py3-none-any.whl (1.5MB)\n    100% |################################| 1.5MB 829kB/s \nCollecting entrypoints (from nbconvert-\u003ejupyter-\u003evpython)\n  Downloading entrypoints-0.2.2-py2.py3-none-any.whl\nCollecting mistune!=0.6 (from nbconvert-\u003ejupyter-\u003evpython)\n  Downloading mistune-0.7.3-py2.py3-none-any.whl\nCollecting pickleshare (from ipython\u003e=4.0.0-\u003eipykernel-\u003ejupyter-\u003evpython)\n  Using cached pickleshare-0.7.4-py2.py3-none-any.whl\nCollecting backports.shutil-get-terminal-size; python_version == \"2.7\" (from ipython\u003e=4.0.0-\u003eipykernel-\u003ejupyter-\u003evpython)\n  Using cached backports.shutil_get_terminal_size-1.0.0-py2.py3-none-any.whl\nRequirement already satisfied (use --upgrade to upgrade): decorator in /usr/lib/python2.7/dist-packages (from ipython\u003e=4.0.0-\u003eipykernel-\u003ejupyter-\u003evpython)\nRequirement already satisfied (use --upgrade to upgrade): simplegeneric\u003e0.8 in /usr/lib/python2.7/dist-packages (from ipython\u003e=4.0.0-\u003eipykernel-\u003ejupyter-\u003evpython)\nRequirement already satisfied (use --upgrade to upgrade): pexpect; sys_platform != \"win32\" in /usr/lib/python2.7/dist-packages (from ipython\u003e=4.0.0-\u003eipykernel-\u003ejupyter-\u003evpython)\nCollecting pathlib2; python_version == \"2.7\" or python_version == \"3.3\" (from ipython\u003e=4.0.0-\u003eipykernel-\u003ejupyter-\u003evpython)\n  Using cached pathlib2-2.1.0-py2.py3-none-any.whl\nRequirement already satisfied (use --upgrade to upgrade): setuptools\u003e=18.5 in /myproject/.env/lib/python2.7/site-packages (from ipython\u003e=4.0.0-\u003eipykernel-\u003ejupyter-\u003evpython)\nRequirement already satisfied (use --upgrade to upgrade): enum34; python_version == \"2.7\" in /usr/lib/python2.7/dist-packages (from traitlets\u003e=4.1.0-\u003eipykernel-\u003ejupyter-\u003evpython)\nRequirement already satisfied (use --upgrade to upgrade): six in /myproject/.env/lib/python2.7/site-packages (from traitlets\u003e=4.1.0-\u003eipykernel-\u003ejupyter-\u003evpython)\nRequirement already satisfied (use --upgrade to upgrade): pyzmq\u003e=13 in /usr/lib/python2.7/dist-packages (from jupyter-client-\u003eipykernel-\u003ejupyter-\u003evpython)\nCollecting wcwidth (from prompt-toolkit\u003c2.0.0,\u003e=1.0.0-\u003ejupyter-console-\u003ejupyter-\u003evpython)\n  Using cached wcwidth-0.1.7-py2.py3-none-any.whl\nCollecting jsonschema!=2.5.0,\u003e=2.0 (from nbformat-\u003enotebook-\u003ejupyter-\u003evpython)\n  Downloading jsonschema-2.5.1-py2.py3-none-any.whl\nRequirement already satisfied (use --upgrade to upgrade): MarkupSafe in /myproject/.env/lib/python2.7/site-packages (from jinja2-\u003enotebook-\u003ejupyter-\u003evpython)\nRequirement already satisfied (use --upgrade to upgrade): ptyprocess in /usr/lib/python2.7/dist-packages (from terminado\u003e=0.3.3; sys_platform != \"win32\"-\u003enotebook-\u003ejupyter-\u003evpython)\nRequirement already satisfied (use --upgrade to upgrade): configparser\u003e=3.5; python_version == \"2.7\" in /usr/local/lib/python2.7/dist-packages (from entrypoints-\u003enbconvert-\u003ejupyter-\u003evpython)\nCollecting functools32; python_version == \"2.7\" (from jsonschema!=2.5.0,\u003e=2.0-\u003enbformat-\u003enotebook-\u003ejupyter-\u003evpython)\n  Downloading functools32-3.2.3-2.zip\nBuilding wheels for collected packages: vpython, vpnotebook, terminado, functools32\n  Running setup.py bdist_wheel for vpython ... done\n  Stored in directory: /home/chris/.cache/pip/wheels/90/06/31/8fc520c9ec44de940a4db5cd9e8bb93c2e24224e0b1c93c69b\n  Running setup.py bdist_wheel for vpnotebook ... error\n  Complete output from command /myproject/.env/bin/python -u -c \"import setuptools, tokenize;__file__='/tmp/pip-build-QU3baz/vpnotebook/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))\" bdist_wheel -d /tmp/tmpcYA7nRpip-wheel- --python-tag cp27:\n  ImportError install_kernel_spec\n  /myproject/.env/local/lib/python2.7/site-packages/setuptools/dist.py:331: UserWarning: Normalizing '0.1.03' to '0.1.3'\n    normalized_version,\n  running bdist_wheel\n  running build\n  running build_py\n  creating build\n  creating build/lib.linux-x86_64-2.7\n  creating build/lib.linux-x86_64-2.7/vpnotebook\n  copying vpnotebook/__init__.py -\u003e build/lib.linux-x86_64-2.7/vpnotebook\n  creating build/lib.linux-x86_64-2.7/vpnotebook/data\n  copying vpnotebook/data/kernel.json -\u003e build/lib.linux-x86_64-2.7/vpnotebook/data\n  installing to build/bdist.linux-x86_64/wheel\n  running install\n  Installing Python module...\n  running install_lib\n  creating build/bdist.linux-x86_64\n  creating build/bdist.linux-x86_64/wheel\n  creating build/bdist.linux-x86_64/wheel/vpnotebook\n  creating build/bdist.linux-x86_64/wheel/vpnotebook/data\n  copying build/lib.linux-x86_64-2.7/vpnotebook/data/kernel.json -\u003e build/bdist.linux-x86_64/wheel/vpnotebook/data\n  copying build/lib.linux-x86_64-2.7/vpnotebook/__init__.py -\u003e build/bdist.linux-x86_64/wheel/vpnotebook\n  running install_egg_info\n  running egg_info\n  writing vpnotebook.egg-info/PKG-INFO\n  writing top-level names to vpnotebook.egg-info/top_level.txt\n  writing dependency_links to vpnotebook.egg-info/dependency_links.txt\n  warning: manifest_maker: standard file '-c' not found\n\n  reading manifest file 'vpnotebook.egg-info/SOURCES.txt'\n  writing manifest file 'vpnotebook.egg-info/SOURCES.txt'\n  Copying vpnotebook.egg-info to build/bdist.linux-x86_64/wheel/vpnotebook-0.1.3-py2.7.egg-info\n  running install_scripts\n  Installing custom kernel ...\n  Traceback (most recent call last):\n    File \"\u003cstring\u003e\", line 1, in \u003cmodule\u003e\n    File \"/tmp/pip-build-QU3baz/vpnotebook/setup.py\", line 30, in \u003cmodule\u003e\n      package_data={'vpnotebook': ['data/kernel.json']},\n    File \"/usr/lib/python2.7/distutils/core.py\", line 151, in setup\n      dist.run_commands()\n    File \"/usr/lib/python2.7/distutils/dist.py\", line 953, in run_commands\n      self.run_command(cmd)\n    File \"/usr/lib/python2.7/distutils/dist.py\", line 972, in run_command\n      cmd_obj.run()\n    File \"/myproject/.env/local/lib/python2.7/site-packages/wheel/bdist_wheel.py\", line 235, in run\n      self.run_command('install')\n    File \"/usr/lib/python2.7/distutils/cmd.py\", line 326, in run_command\n      self.distribution.run_command(command)\n    File \"/usr/lib/python2.7/distutils/dist.py\", line 972, in run_command\n      cmd_obj.run()\n    File \"vpnotebook/__init__.py\", line 72, in run\n      run_kernel_install(False)\n    File \"vpnotebook/__init__.py\", line 63, in run_kernel_install\n      install_kernel_spec(source_dir, kernel_name='vpython', user=user)\n  NameError: free variable 'install_kernel_spec' referenced before assignment in enclosing scope\n\n  ----------------------------------------\n  Failed building wheel for vpnotebook\n  Running setup.py clean for vpnotebook\n  Running setup.py bdist_wheel for terminado ... done\n  Stored in directory: /home/chris/.cache/pip/wheels/3b/c2/ea/af635ffb63857a8c2ddd22da6a4b52f5b7ea3065db94ef5d7c\n  Running setup.py bdist_wheel for functools32 ... done\n  Stored in directory: /home/chris/.cache/pip/wheels/3c/d0/09/cd78d0ff4d6cfecfbd730782a7815a4571cd2cd4d2ed6e69d9\nSuccessfully built vpython terminado functools32\nFailed to build vpnotebook\nInstalling collected packages: pathlib2, pickleshare, wcwidth, prompt-toolkit, ipython-genutils, traitlets, backports.shutil-get-terminal-size, ipython, jupyter-core, jupyter-client, ipykernel, jupyter-console, qtconsole, functools32, jsonschema, nbformat, entrypoints, mistune, nbconvert, terminado, notebook, widgetsnbextension, ipywidgets, jupyter, vpnotebook, vpython\n  Found existing installation: ipython 2.4.1\n    Not uninstalling ipython at /usr/lib/python2.7/dist-packages, outside environment /myproject/.env\n  Running setup.py install for vpnotebook ... done\nSuccessfully installed backports.shutil-get-terminal-size-1.0.0 entrypoints-0.2.2 functools32-3.2.3.post2 ipykernel-4.5.0 ipython-5.1.0 ipython-genutils-0.1.0 ipywidgets-5.2.2 jsonschema-2.5.1 jupyter-1.0.0 jupyter-client-4.4.0 jupyter-console-5.0.0 jupyter-core-4.2.0 mistune-0.7.3 nbconvert-4.2.0 nbformat-4.1.0 notebook-4.2.3 pathlib2-2.1.0 pickleshare-0.7.4 prompt-toolkit-1.0.8 qtconsole-4.2.1 terminado-0.6 traitlets-4.3.1 vpnotebook-0.1.3 vpython-1.0.9 wcwidth-0.1.7 widgetsnbextension-1.2.6\n$ python\nPython 2.7.12 (default, Jul  1 2016, 15:12:24) \n[GCC 5.4.0 20160609] on linux2\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n\u003e\u003e\u003e import vpython\nTraceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n  File \"/myproject/.env/local/lib/python2.7/site-packages/vpython/__init__.py\", line 10, in \u003cmodule\u003e\n    from .vpython import *\n  File \"/myproject/.env/local/lib/python2.7/site-packages/vpython/vpython.py\", line 442, in \u003cmodule\u003e\n    get_ipython().kernel.comm_manager.register_target('glow', GlowWidget)\nAttributeError: 'NoneType' object has no attribute 'kernel'\n```\n","author":{"url":"https://github.com/chrisspen","@type":"Person","name":"chrisspen"},"datePublished":"2016-10-24T14:10:53.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/10/visual/issues/10"}