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昨晚在Ubuntu下下载了Anaconda并按照其说明安装了Jupyter。我希望复制一些用 Python 编写的相当简单的代码,这些代码已经在普通的 Python 3.x 环境中运行,并且还在 Jupyter 的试用版中运行,所以我想我们正在寻找一个系统问题。
在安装时,我首先打开一个 Python 3 笔记本,它显示“Kernel Starting please wait..”然后它说它已准备就绪,然后在几秒钟后它说内核已死并且无法重新启动。事实上,它返回特定消息“Dead kernel”。这是在我什至输入任何类型的任何代码之前。
我已经正确安装了所有东西 - 我想!
我正在运行 16.04 LTS。 Python 是 3.7
我检查了其他类似的帖子,但提供的解决方案不适合这种情况。是不是更深层次的东西。
感谢您提供的任何帮助。
Jupyter notebook --debug 的输出如下:
peter@xxxx:~$ jupyter notebook --debug
[D 19:45:46.147 NotebookApp] Searching ['/home/peter', '/home/peter/.jupyter', '/home/peter/anaconda3/etc/jupyter', '/usr/local/etc/jupyter', '/etc/jupyter'] for config files
[D 19:45:46.149 NotebookApp] Looking for jupyter_config in /etc/jupyter
[D 19:45:46.149 NotebookApp] Looking for jupyter_config in /usr/local/etc/jupyter
[D 19:45:46.150 NotebookApp] Looking for jupyter_config in /home/peter/anaconda3/etc/jupyter
[D 19:45:46.150 NotebookApp] Looking for jupyter_config in /home/peter/.jupyter
[D 19:45:46.150 NotebookApp] Looking for jupyter_config in /home/peter
[D 19:45:46.152 NotebookApp] Looking for jupyter_notebook_config in /etc/jupyter
[D 19:45:46.152 NotebookApp] Looking for jupyter_notebook_config in /usr/local/etc/jupyter
[D 19:45:46.152 NotebookApp] Looking for jupyter_notebook_config in /home/peter/anaconda3/etc/jupyter
[D 19:45:46.153 NotebookApp] Looking for jupyter_notebook_config in /home/peter/.jupyter
[D 19:45:46.153 NotebookApp] Looking for jupyter_notebook_config in /home/peter
[I 19:45:46.644 NotebookApp] Serving notebooks from local directory: /home/peter
[I 19:45:46.644 NotebookApp] 0 active kernels
[I 19:45:46.644 NotebookApp] The Jupyter Notebook is running at: http://localhost:8888/?token=aabe7a1a36a3b0bbeac24f68420aca3996fc05257b13eb85
[I 19:45:46.644 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 19:45:46.651 NotebookApp]
Copy/paste this URL into your browser when you connect for the first time,
to login with a token:
http://localhost:8888/?token=aabe7a1a36a3b0bbeac24f68420aca3996fc05257b13eb85
[I 19:45:46.882 NotebookApp] Accepting one-time-token-authenticated connection from 127.0.0.1
[D 19:45:46.885 NotebookApp] Using contents: services/contents
[D 19:45:46.982 NotebookApp] Path base/images/favicon.ico served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/base/images/favicon.ico
[D 19:45:46.982 NotebookApp] Path components/jquery-ui/themes/smoothness/jquery-ui.min.css served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/jquery-ui/themes/smoothness/jquery-ui.min.css
[D 19:45:46.983 NotebookApp] Path components/jquery-typeahead/dist/jquery.typeahead.min.css served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/jquery-typeahead/dist/jquery.typeahead.min.css
[D 19:45:46.983 NotebookApp] Path style/style.min.css served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/style/style.min.css
[D 19:45:46.985 NotebookApp] Path components/es6-promise/promise.min.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/es6-promise/promise.min.js
[D 19:45:46.985 NotebookApp] Path components/requirejs/require.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/requirejs/require.js
[D 19:45:46.986 NotebookApp] Path base/images/logo.png served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/base/images/logo.png
[D 19:45:46.987 NotebookApp] Path tree/js/main.min.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/tree/js/main.min.js
[D 19:45:46.993 NotebookApp] 200 GET /tree?token=b921788f87fa7cc313f98e9e4e37a23f005ad3f2e727cc3f (127.0.0.1) 112.57ms
[D 19:45:47.120 NotebookApp] Path custom.css served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/custom/custom.css
[D 19:45:47.122 NotebookApp] 304 GET /custom/custom.css (127.0.0.1) 3.34ms
[D 19:45:47.499 NotebookApp] Path services/contents.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/services/contents.js
[D 19:45:47.501 NotebookApp] 200 GET /static/services/contents.js?v=20170427194546 (127.0.0.1) 5.54ms
[D 19:45:47.510 NotebookApp] Path custom.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/custom/custom.js
[D 19:45:47.512 NotebookApp] 200 GET /custom/custom.js?v=20170427194546 (127.0.0.1) 3.43ms
[D 19:45:47.585 NotebookApp] 200 GET /api/config/tree?_=1493318747367 (127.0.0.1) 7.78ms
[D 19:45:47.591 NotebookApp] 200 GET /api/config/common?_=1493318747368 (127.0.0.1) 4.54ms
[D 19:45:47.599 NotebookApp] 200 GET /api/terminals?_=1493318747369 (127.0.0.1) 1.57ms
[D 19:45:47.606 NotebookApp] Found kernel python3 in /usr/local/share/jupyter/kernels
[D 19:45:47.607 NotebookApp] Found kernel python3 in /usr/local/share/jupyter/kernels
[D 19:45:47.614 NotebookApp] 304 GET /api/kernelspecs (127.0.0.1) 10.39ms
[D 19:45:47.618 NotebookApp] 200 GET /api/terminals?_=1493318747371 (127.0.0.1) 1.68ms
[D 19:45:47.621 NotebookApp] 200 GET /api/sessions?_=1493318747370 (127.0.0.1) 2.22ms
[D 19:45:47.714 NotebookApp] 200 GET /api/contents?type=directory&_=1493318747372 (127.0.0.1) 40.84ms
[I 19:45:53.598 NotebookApp] Creating new notebook in
[D 19:45:53.604 NotebookApp] Saving /home/peter/Untitled5.ipynb
[D 19:45:53.939 NotebookApp] 201 POST /api/contents (127.0.0.1) 343.75ms
[D 19:45:53.948 NotebookApp] Using contents: services/contents
[D 19:45:54.008 NotebookApp] Path components/bootstrap-tour/build/css/bootstrap-tour.min.css served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/bootstrap-tour/build/css/bootstrap-tour.min.css
[D 19:45:54.008 NotebookApp] Path components/codemirror/lib/codemirror.css served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/codemirror/lib/codemirror.css
[D 19:45:54.009 NotebookApp] Path notebook/css/override.css served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/notebook/css/override.css
[D 19:45:54.010 NotebookApp] Path components/text-encoding/lib/encoding.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/text-encoding/lib/encoding.js
[D 19:45:54.010 NotebookApp] Path notebook/js/main.min.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/notebook/js/main.min.js
[D 19:45:54.016 NotebookApp] 200 GET /notebooks/Untitled5.ipynb?kernel_name=python3 (127.0.0.1) 69.16ms
[D 19:45:54.063 NotebookApp] Path components/MathJax/MathJax.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/MathJax/MathJax.js
[D 19:45:54.064 NotebookApp] 304 GET /static/components/MathJax/MathJax.js?config=TeX-AMS_HTML-full,Safe&delayStartupUntil=configured (127.0.0.1) 2.21ms
[D 19:45:54.067 NotebookApp] 304 GET /custom/custom.css (127.0.0.1) 1.47ms
[D 19:45:54.220 NotebookApp] Path components/MathJax/config/TeX-AMS_HTML-full.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/MathJax/config/TeX-AMS_HTML-full.js
[D 19:45:54.221 NotebookApp] 304 GET /static/components/MathJax/config/TeX-AMS_HTML-full.js?rev=2.6.0 (127.0.0.1) 2.67ms
[D 19:45:54.635 NotebookApp] 304 GET /custom/custom.js?v=20170427194546 (127.0.0.1) 1.61ms
[D 19:45:54.711 NotebookApp] Path components/MathJax/config/Safe.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/MathJax/config/Safe.js
[D 19:45:54.713 NotebookApp] 304 GET /static/components/MathJax/config/Safe.js?rev=2.6.0 (127.0.0.1) 2.84ms
[D 19:45:54.788 NotebookApp] 200 GET /api/config/notebook?_=1493318754418 (127.0.0.1) 8.55ms
[D 19:45:54.795 NotebookApp] 200 GET /api/config/common?_=1493318754419 (127.0.0.1) 5.98ms
[D 19:45:54.918 NotebookApp] Found kernel python3 in /usr/local/share/jupyter/kernels
[D 19:45:54.918 NotebookApp] Found kernel python3 in /usr/local/share/jupyter/kernels
[D 19:45:54.920 NotebookApp] 304 GET /api/kernelspecs (127.0.0.1) 3.39ms
[D 19:45:55.147 NotebookApp] 200 GET /api/contents/Untitled5.ipynb?type=notebook&_=1493318754420 (127.0.0.1) 180.31ms
[D 19:45:55.150 NotebookApp] Path components/MathJax/extensions/Safe.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/MathJax/extensions/Safe.js
[D 19:45:55.151 NotebookApp] 304 GET /static/components/MathJax/extensions/Safe.js?rev=2.6.0 (127.0.0.1) 1.94ms
[D 19:45:55.153 NotebookApp] Path jupyter-js-widgets/extension.js served from /home/peter/anaconda3/share/jupyter/nbextensions/jupyter-js-widgets/extension.js
[D 19:45:55.158 NotebookApp] 200 GET /nbextensions/jupyter-js-widgets/extension.js?v=20170427194546 (127.0.0.1) 5.83ms
[D 19:45:55.160 NotebookApp] Path components/MathJax/jax/output/HTML-CSS/fonts/STIX-Web/fontdata.js served from /home/peter/anaconda3/lib/python3.6/site-packages/notebook/static/components/MathJax/jax/output/HTML-CSS/fonts/STIX-Web/fontdata.js
[D 19:45:55.161 NotebookApp] 304 GET /static/components/MathJax/jax/output/HTML-CSS/fonts/STIX-Web/fontdata.js?rev=2.6.0 (127.0.0.1) 2.33ms
[D 19:45:55.372 NotebookApp] Found kernel python3 in /usr/local/share/jupyter/kernels
[D 19:45:55.374 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-de446353-af9d-4b59-bfc1-a8cdb4572ac4.json']
[D 19:45:55.387 NotebookApp] Connecting to: tcp://127.0.0.1:39311
[I 19:45:55.389 NotebookApp] Kernel started: de446353-af9d-4b59-bfc1-a8cdb4572ac4
[D 19:45:55.390 NotebookApp] Kernel args: {'kernel_name': 'python3', 'cwd': '/home/peter'}
[D 19:45:55.393 NotebookApp] 201 POST /api/sessions (127.0.0.1) 44.08ms
[D 19:45:55.398 NotebookApp] 200 GET /api/contents/Untitled5.ipynb/checkpoints?_=1493318754421 (127.0.0.1) 3.89ms
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[D 19:45:55.554 NotebookApp] Initializing websocket connection /api/kernels/de446353-af9d-4b59-bfc1-a8cdb4572ac4/channels
[D 19:45:55.564 NotebookApp] Requesting kernel info from de446353-af9d-4b59-bfc1-a8cdb4572ac4
[D 19:45:55.565 NotebookApp] Connecting to: tcp://127.0.0.1:49900
[I 19:45:58.388 NotebookApp] KernelRestarter: restarting kernel (1/5)
[D 19:45:58.390 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-de446353-af9d-4b59-bfc1-a8cdb4572ac4.json']
[D 19:45:58.397 NotebookApp] Connecting to: tcp://127.0.0.1:39311
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[I 19:46:01.397 NotebookApp] KernelRestarter: restarting kernel (2/5)
[D 19:46:01.399 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-de446353-af9d-4b59-bfc1-a8cdb4572ac4.json']
[D 19:46:01.407 NotebookApp] Connecting to: tcp://127.0.0.1:39311
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[I 19:46:04.409 NotebookApp] KernelRestarter: restarting kernel (3/5)
[D 19:46:04.411 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-de446353-af9d-4b59-bfc1-a8cdb4572ac4.json']
[D 19:46:04.421 NotebookApp] Connecting to: tcp://127.0.0.1:39311
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[W 19:46:05.568 NotebookApp] Timeout waiting for kernel_info reply from de446353-af9d-4b59-bfc1-a8cdb4572ac4
[D 19:46:05.571 NotebookApp] Opening websocket /api/kernels/de446353-af9d-4b59-bfc1-a8cdb4572ac4/channels
[D 19:46:05.571 NotebookApp] Connecting to: tcp://127.0.0.1:49900
[D 19:46:05.572 NotebookApp] Connecting to: tcp://127.0.0.1:52325
[D 19:46:05.573 NotebookApp] Connecting to: tcp://127.0.0.1:38447
[I 19:46:07.423 NotebookApp] KernelRestarter: restarting kernel (4/5)
WARNING:root:kernel de446353-af9d-4b59-bfc1-a8cdb4572ac4 restarted
[D 19:46:07.426 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-de446353-af9d-4b59-bfc1-a8cdb4572ac4.json']
[D 19:46:07.435 NotebookApp] Connecting to: tcp://127.0.0.1:39311
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[W 19:46:10.438 NotebookApp] KernelRestarter: restart failed
[W 19:46:10.438 NotebookApp] Kernel de446353-af9d-4b59-bfc1-a8cdb4572ac4 died, removing from map.
ERROR:root:kernel de446353-af9d-4b59-bfc1-a8cdb4572ac4 restarted failed!
[D 19:46:10.476 NotebookApp] Websocket closed de446353-af9d-4b59-bfc1-a8cdb4572ac4:3D6BAC1FF1694B3B8331E3A303569344
[W 19:46:10.482 NotebookApp] Kernel deleted before session
[W 19:46:10.483 NotebookApp] 410 DELETE /api/sessions/9710cac7-54ef-461d-a3b4-acbfcf981ce8 (127.0.0.1) 3.52ms referer=http://localhost:8888/notebooks/Untitled5.ipynb?kernel_name=python3
[W 19:46:16.663 NotebookApp] Session not found: session_id='9710cac7-54ef-461d-a3b4-acbfcf981ce8'
[W 19:46:16.664 NotebookApp] 404 DELETE /api/sessions/9710cac7-54ef-461d-a3b4-acbfcf981ce8 (127.0.0.1) 2.51ms referer=http://localhost:8888/notebooks/Untitled5.ipynb?kernel_name=python3
[D 19:46:16.712 NotebookApp] Found kernel python3 in /usr/local/share/jupyter/kernels
[D 19:46:16.714 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-fb22aad0-0e7c-42c5-b026-1e25ecf89439.json']
[D 19:46:16.723 NotebookApp] Connecting to: tcp://127.0.0.1:55773
[I 19:46:16.725 NotebookApp] Kernel started: fb22aad0-0e7c-42c5-b026-1e25ecf89439
[D 19:46:16.725 NotebookApp] Kernel args: {'kernel_name': 'python3', 'cwd': '/home/peter'}
[D 19:46:16.727 NotebookApp] 201 POST /api/sessions (127.0.0.1) 23.69ms
[D 19:46:16.766 NotebookApp] Initializing websocket connection /api/kernels/fb22aad0-0e7c-42c5-b026-1e25ecf89439/channels
[D 19:46:16.771 NotebookApp] Requesting kernel info from fb22aad0-0e7c-42c5-b026-1e25ecf89439
[D 19:46:16.771 NotebookApp] Connecting to: tcp://127.0.0.1:36903
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[I 19:46:19.726 NotebookApp] KernelRestarter: restarting kernel (1/5)
[D 19:46:19.728 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-fb22aad0-0e7c-42c5-b026-1e25ecf89439.json']
[D 19:46:19.739 NotebookApp] Connecting to: tcp://127.0.0.1:55773
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[I 19:46:22.742 NotebookApp] KernelRestarter: restarting kernel (2/5)
[D 19:46:22.744 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-fb22aad0-0e7c-42c5-b026-1e25ecf89439.json']
[D 19:46:22.753 NotebookApp] Connecting to: tcp://127.0.0.1:55773
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[I 19:46:25.756 NotebookApp] KernelRestarter: restarting kernel (3/5)
[D 19:46:25.758 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-fb22aad0-0e7c-42c5-b026-1e25ecf89439.json']
[D 19:46:25.767 NotebookApp] Connecting to: tcp://127.0.0.1:55773
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[W 19:46:26.773 NotebookApp] Timeout waiting for kernel_info reply from fb22aad0-0e7c-42c5-b026-1e25ecf89439
[D 19:46:26.775 NotebookApp] Opening websocket /api/kernels/fb22aad0-0e7c-42c5-b026-1e25ecf89439/channels
[D 19:46:26.776 NotebookApp] Connecting to: tcp://127.0.0.1:36903
[D 19:46:26.777 NotebookApp] Connecting to: tcp://127.0.0.1:53792
[D 19:46:26.778 NotebookApp] Connecting to: tcp://127.0.0.1:44277
[I 19:46:28.769 NotebookApp] KernelRestarter: restarting kernel (4/5)
WARNING:root:kernel fb22aad0-0e7c-42c5-b026-1e25ecf89439 restarted
[D 19:46:28.772 NotebookApp] Starting kernel: ['python', '-m', 'ipykernel_launcher', '-f', '/run/user/1000/jupyter/kernel-fb22aad0-0e7c-42c5-b026-1e25ecf89439.json']
[D 19:46:28.781 NotebookApp] Connecting to: tcp://127.0.0.1:55773
/home/peter/anaconda3/bin/python: No module named ipykernel_launcher
[W 19:46:31.784 NotebookApp] KernelRestarter: restart failed
[W 19:46:31.785 NotebookApp] Kernel fb22aad0-0e7c-42c5-b026-1e25ecf89439 died, removing from map.
ERROR:root:kernel fb22aad0-0e7c-42c5-b026-1e25ecf89439 restarted failed!
[D 19:46:31.843 NotebookApp] Websocket closed fb22aad0-0e7c-42c5-b026-1e25ecf89439:3D6BAC1FF1694B3B8331E3A303569344
[W 19:46:31.849 NotebookApp] Kernel deleted before session
[W 19:46:31.851 NotebookApp] 410 DELETE /api/sessions/f6a1b60a-6b90-4fd3-8166-b3de0d35cf74 (127.0.0.1) 4.29ms referer=http://localhost:8888/notebooks/Untitled5.ipynb?kernel_name=python3
^C[I 19:46:51.302 NotebookApp] interrupted
Serving notebooks from local directory: /home/peter
0 active kernels
The Jupyter Notebook is running at: http://localhost:8888/?token=aabe7a1a36a3b0bbeac24f68420aca3996fc05257b13eb85
Shutdown this notebook server (y/[n])? yNo answer for 5s: resuming operation...
y
^C[I 19:47:12.400 NotebookApp] interrupted
Serving notebooks from local directory: /home/peter
0 active kernels
The Jupyter Notebook is running at: http://localhost:8888/?token=aabe7a1a36a3b0bbeac24f68420aca3996fc05257b13eb85
Shutdown this notebook server (y/[n])? y
[C 19:47:14.911 NotebookApp] Shutdown confirmed
[I 19:47:14.912 NotebookApp] Shutting down kernels
peter@xxxx:~$
最佳答案
刚刚在 Ubuntu 14.04 上遇到了同样的问题
通过升级ipykernel解决了
sudo pip install --upgrade ipykernel
关于python-3.x - Jupyter 内核在 Ubuntu 上死机,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43665916/
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我正在玩 Rank-N-type 并尝试输入 x x .但我发现这两个函数可以以相同的方式输入,这很不直观。 f :: (forall a b. a -> b) -> c f x = x x g ::
这个问题已经有答案了: How do you compare two version Strings in Java? (31 个回答) 已关闭 8 年前。 有谁知道如何在Java中比较两个版本字符串
这个问题已经有答案了: How do the post increment (i++) and pre increment (++i) operators work in Java? (14 个回答)
下面是带有 -n 和 -r 选项的 netstat 命令的输出,其中目标字段显示压缩地址 (127.1/16)。我想知道 netstat 命令是否有任何方法或选项可以显示整个目标 IP (127.1.
我知道要证明 : (¬ ∀ x, p x) → (∃ x, ¬ p x) 证明是: theorem : (¬ ∀ x, p x) → (∃ x, ¬ p x) := begin intro n
x * x 如何通过将其存储在“auto 变量”中来更改?我认为它应该仍然是相同的,并且我的测试表明类型、大小和值显然都是相同的。 但即使 x * x == (xx = x * x) 也是错误的。什么
假设,我们这样表达: someIQueryable.Where(x => x.SomeBoolProperty) someIQueryable.Where(x => !x.SomeBoolProper
我有一个字符串 1234X5678 我使用这个正则表达式来匹配模式 .X|..X|X. 我得到了 34X 问题是为什么我没有得到 4X 或 X5? 为什么正则表达式选择执行第二种模式? 最佳答案 这里
我的一个 friend 在面试时遇到了这个问题 找到使该函数返回真值的 x 值 function f(x) { return (x++ !== x) && (x++ === x); } 面试官
这个问题在这里已经有了答案: 10年前关闭。 Possible Duplicate: Isn't it easier to work with foo when it is represented b
我是 android 的新手,我一直在练习开发一个针对 2.2 版本的应用程序,我需要帮助了解如何将我的应用程序扩展到其他版本,即 1.x、2.3.x、3 .x 和 4.x.x,以及一些针对屏幕分辨率
为什么案例 1 给我们 :error: TypeError: x is undefined on line... //case 1 var x; x.push(x); console.log(x);
代码优先: # CASE 01 def test1(x): x += x print x l = [100] test1(l) print l CASE01 输出: [100, 100
我正在努力温习我的大计算。如果我有将所有项目移至 'i' 2 个空格右侧的函数,我有一个如下所示的公式: (n -1) + (n - 2) + (n - 3) ... (n - n) 第一次迭代我必须
给定 IP 字符串(如 x.x.x.x/x),我如何或将如何计算 IP 的范围最常见的情况可能是 198.162.1.1/24但可以是任何东西,因为法律允许的任何东西。 我要带198.162.1.1/
在我作为初学者努力编写干净的 Javascript 代码时,我最近阅读了 this article当我偶然发现这一段时,关于 JavaScript 中的命名空间: The code at the ve
我正在编写一个脚本,我希望避免污染 DOM 的其余部分,它将是一个用于收集一些基本访问者分析数据的第 3 方脚本。 我通常使用以下内容创建一个伪“命名空间”: var x = x || {}; 我正在
我尝试运行我的test_container_services.py套件,但遇到了以下问题: docker.errors.APIError:500服务器错误:内部服务器错误(“ b'{” message
是否存在这两个 if 语句会产生不同结果的情况? if(x as X != null) { // Do something } if(x is X) { // Do something } 编
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