无输出Jupyter Noteb

Question

首先，我将MacOSX与chrome浏览器一起使用。在

在执行简单的print语句时，我无法读取任何输出。在

我首先创建了一个名为“的简单文件”你好.py““

print("hola")

然后我使用jupytext将其转换为ipython笔记本格式

^{pr2}$

然后我运行jupyter notebook，但是我没有收到任何输出。在

我试过各种方法，比如Print not showing in ipython notebook。在

根据其他地方的注释，*表示正在处理。我给了它足够的时间，它只是一个简单的打印语句，应该立即处理。在

可能有用的其他信息。 Pipfile公司

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]

[packages]
numpy = "*"
matplotlib = "*"
pytest = "*"
setuptools = "*"
cycler = "*"
kiwisolver = "*"
pyparsing = "*"
jupyter = "*"
ipython = "*"
nbformat = "*"
jupytext = "*"
jupyter-kernel-gateway = "*"

[requires]
python_version = "3.7"

jupyter troubleshoot的输出

$PATH:
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/bin
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/bin
    /Users/harvest/.yarn/bin
    /Users/harvest/.config/yarn/global/node_modules/.bin
    /Users/harvest/.pyenv/shims
    /Users/harvest/.nodenv/shims
    /Users/harvest/.rbenv/shims
    /Users/harvest/bin
    /usr/local/bin
    /usr/local/Cellar/pipenv/2018.11.26_1/libexec/tools
    /Users/harvest/.yarn/bin
    /Users/harvest/.config/yarn/global/node_modules/.bin
    /Users/harvest/.pyenv/shims
    /Users/harvest/.nodenv/shims
    /Users/harvest/.rbenv/shims
    /Users/harvest/bin
    /usr/local/bin
    /usr/local/bin
    /usr/bin
    /bin
    /usr/sbin
    /sbin
    /Library/Frameworks/Mono.framework/Versions/Current/Commands
    /Applications/Postgres.app/Contents/Versions/latest/bin
    /Users/harvest/.composer/vendor/bin
    /Users/harvest/.composer/vendor/bin

sys.path:
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/bin
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/lib/python37.zip
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/lib/python3.7
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/lib/python3.7/lib-dynload
    /usr/local/Cellar/python/3.7.2_1/Frameworks/Python.framework/Versions/3.7/lib/python3.7
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/lib/python3.7/site-packages

sys.executable:
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/bin/python3.7

sys.version:
    3.7.2 (default, Jan 13 2019, 12:50:01) 
    [Clang 10.0.0 (clang-1000.11.45.5)]

platform.platform():
    Darwin-18.2.0-x86_64-i386-64bit

which -a jupyter:
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/bin/jupyter
    /Users/harvest/.local/share/virtualenvs/make-your-own-neural-network-3AgNnsP-/bin/jupyter

pip list:
    Package                Version    
    ---------------------- -----------
    appnope                0.1.0      
    atomicwrites           1.3.0      
    attrs                  19.1.0     
    backcall               0.1.0      
    bleach                 3.1.0      
    certifi                2018.11.29 
    chardet                3.0.4      
    cycler                 0.10.0     
    decorator              4.3.2      
    defusedxml             0.5.0      
    entrypoints            0.3        
    freetype-py            2.0.0.post6
    idna                   2.8        
    ipykernel              5.1.0      
    ipython                7.3.0      
    ipython-genutils       0.2.0      
    ipywidgets             7.4.2      
    jedi                   0.13.3     
    Jinja2                 2.10       
    jsonschema             3.0.1      
    jupyter                1.0.0      
    jupyter-client         5.2.4      
    jupyter-console        6.0.0      
    jupyter-core           4.4.0      
    jupyter-kernel-gateway 2.2.0      
    jupytext               1.0.2      
    kiwisolver             1.0.1      
    MarkupSafe             1.1.1      
    matplotlib             3.0.3      
    mistune                0.8.4      
    mock                   2.0.0      
    more-itertools         6.0.0      
    nbconvert              5.4.1      
    nbformat               4.4.0      
    notebook               5.7.4      
    numpy                  1.16.2     
    pandocfilters          1.4.2      
    parso                  0.3.4      
    pbr                    5.1.3      
    pexpect                4.6.0      
    pickleshare            0.7.5      
    pip                    19.0.3     
    pluggy                 0.9.0      
    prometheus-client      0.6.0      
    prompt-toolkit         2.0.9      
    ptyprocess             0.6.0      
    py                     1.8.0      
    Pygments               2.3.1      
    pyparsing              2.3.1      
    pyrsistent             0.14.11    
    pytest                 4.3.0      
    python-dateutil        2.8.0      
    PyYAML                 3.13       
    pyzmq                  18.0.0     
    qtconsole              4.4.3      
    requests               2.21.0     
    Send2Trash             1.5.0      
    setuptools             40.8.0     
    six                    1.12.0     
    terminado              0.8.1      
    testfixtures           6.6.0      
    testpath               0.4.2      
    tornado                6.0        
    traitlets              4.3.2      
    urllib3                1.24.1     
    wcwidth                0.1.7      
    webencodings           0.5.1      
    wheel                  0.33.1     
    widgetsnbextension     3.4.2

Answer 1

我可以通过卸载tornado 6和安装tornado 5来解决这个问题。在

5.1.1是最后一个稳定版本，解决了我的问题。在

引用自Jupyter notebook: No connection to server because websocket connection fails