ModuleNotFoundError: No module named 'matplotlib' - Deploying Issue of Jupyter Project on Heroku

Question

我想在 heroku 上實現一個 jupyter notebook 項目的部署。 它基本上是我想要部署的交互式筆記本。 但是，在部署過程中，我在跟蹤日志文件時遇到了兩個錯誤。

第一個是 ModuleNotFoundError：沒有名為“matplotlib”的模塊。
第二個是“需要 IPython 將 IPython 語法轉換為純 Python。如果需要此功能，請安裝 ipython。”

我的系統中有 ipython 和 matplotlib 。 我通過pip freeze檢查了兩者的版本。
ipython==7.12.0
matplotlib==3.1.3

我不明白為什么會出現這些錯誤。 非常感謝任何幫助！

這是來自 Heroku 的完整日志文件。

(base) MacBook-Pro:minimal-heroku-demo earik$ heroku logs --tail
2020-08-06T18:44:46.883080+00:00 app[web.1]: 
2020-08-06T18:44:46.901384+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data" host=visud.herokuapp.com request_id=ca273d7c-546b-4f7e-b7c2-87816e7ac86e fwd="31.151.169.49" dyno=web.1 connect=0ms service=40ms status=200 bytes=27101 protocol=https
2020-08-06T18:44:47.667700+00:00 app[web.1]: 2020-08-06 18:44:47,667 WebSocket connection opened
2020-08-06T18:44:47.668508+00:00 app[web.1]: 2020-08-06 18:44:47,668 ServerConnection created
2020-08-06T18:45:24.533104+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data/ws" host=visud.herokuapp.com request_id=c13c0bf8-5db0-4616-b07c-b98fcf919bb4 fwd="31.151.169.49" dyno=web.1 connect=1ms service=36872ms status=101 bytes=477 protocol=https
2020-08-06T18:45:24.533488+00:00 app[web.1]: 2020-08-06 18:45:24,533 WebSocket connection closed: code=1001, reason=None
2020-08-06T18:48:37.151660+00:00 heroku[router]: at=info method=GET path="/" host=visud.herokuapp.com request_id=4a9d3492-d274-48cc-93c8-da21141013b3 fwd="31.151.169.49" dyno=web.1 connect=0ms service=4ms status=302 bytes=197 protocol=https
2020-08-06T18:48:37.308781+00:00 app[web.1]: 2020-08-06 18:48:37,308 Error running application handler <bokeh.application.handlers.notebook.NotebookHandler object at 0x7f1836ed4710>: No module named 'matplotlib'
2020-08-06T18:48:37.308790+00:00 app[web.1]: File "vis_ultrafast_data.ipynb", line 14, in <module>:
2020-08-06T18:48:37.308792+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. " Traceback (most recent call last):
2020-08-06T18:48:37.308793+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/bokeh/application/handlers/code_runner.py", line 197, in run
2020-08-06T18:48:37.308794+00:00 app[web.1]: exec(self._code, module.__dict__)
2020-08-06T18:48:37.308794+00:00 app[web.1]: File "/app/vis_ultrafast_data.ipynb", line 14, in <module>
2020-08-06T18:48:37.308795+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. "
2020-08-06T18:48:37.308795+00:00 app[web.1]: ModuleNotFoundError: No module named 'matplotlib'
2020-08-06T18:48:37.309124+00:00 app[web.1]: 
2020-08-06T18:48:37.326437+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data" host=visud.herokuapp.com request_id=54338a39-dab0-463b-9519-91b53ffd86e1 fwd="31.151.169.49" dyno=web.1 connect=1ms service=26ms status=200 bytes=27101 protocol=https
2020-08-06T18:48:38.160103+00:00 app[web.1]: 2020-08-06 18:48:38,159 WebSocket connection opened
2020-08-06T18:48:38.160675+00:00 app[web.1]: 2020-08-06 18:48:38,160 ServerConnection created
2020-08-06T18:48:48.443288+00:00 app[web.1]: 2020-08-06 18:48:48,443 Error running application handler <bokeh.application.handlers.notebook.NotebookHandler object at 0x7f1836ed4710>: No module named 'matplotlib'
2020-08-06T18:48:48.443304+00:00 app[web.1]: File "vis_ultrafast_data.ipynb", line 14, in <module>:
2020-08-06T18:48:48.443305+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. " Traceback (most recent call last):
2020-08-06T18:48:48.443306+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/bokeh/application/handlers/code_runner.py", line 197, in run
2020-08-06T18:48:48.443306+00:00 app[web.1]: exec(self._code, module.__dict__)
2020-08-06T18:48:48.443307+00:00 app[web.1]: File "/app/vis_ultrafast_data.ipynb", line 14, in <module>
2020-08-06T18:48:48.443307+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. "
2020-08-06T18:48:48.443308+00:00 app[web.1]: ModuleNotFoundError: No module named 'matplotlib'
2020-08-06T18:48:48.443314+00:00 app[web.1]: 
2020-08-06T18:48:48.453408+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data" host=visud.herokuapp.com request_id=cda49257-07b5-471b-98ac-21121ead102e fwd="31.151.169.49" dyno=web.1 connect=1ms service=13ms status=200 bytes=27141 protocol=https
2020-08-06T18:48:48.588733+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data/ws" host=visud.herokuapp.com request_id=bcf674eb-4aa4-40f9-bdcc-ee73d956f61b fwd="31.151.169.49" dyno=web.1 connect=1ms service=10430ms status=101 bytes=474 protocol=https
2020-08-06T18:48:48.589089+00:00 app[web.1]: 2020-08-06 18:48:48,588 WebSocket connection closed: code=1001, reason=None
2020-08-06T18:48:48.969487+00:00 app[web.1]: 2020-08-06 18:48:48,969 WebSocket connection opened
2020-08-06T18:48:48.970460+00:00 app[web.1]: 2020-08-06 18:48:48,970 ServerConnection created
2020-08-06T18:49:13.401206+00:00 heroku[web.1]: Restarting
2020-08-06T18:49:13.415818+00:00 heroku[web.1]: State changed from up to starting
2020-08-06T18:49:14.564555+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2020-08-06T18:49:14.603078+00:00 app[web.1]: Received signal 15, shutting down
2020-08-06T18:49:14.826506+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data/ws" host=visud.herokuapp.com request_id=a36193de-8d01-4cf8-8eb5-f318c50f9fed fwd="31.151.169.49" dyno=web.1 connect=0ms service=25856ms status=101 bytes=226 protocol=https
2020-08-06T18:49:14.889499+00:00 heroku[web.1]: Process exited with status 0
2020-08-06T18:49:23.764286+00:00 heroku[web.1]: Starting process with command `panel serve --address="0.0.0.0" --port=16711 vis_ultrafast_data.ipynb --allow-websocket-origin=visud.herokuapp.com`
2020-08-06T18:49:31.255019+00:00 app[web.1]: /app/.heroku/python/lib/python3.6/site-packages/nbconvert/filters/strings.py:214: UserWarning: IPython is needed to transform IPython syntax to pure Python. Install ipython if you need this functionality.
2020-08-06T18:49:31.255085+00:00 app[web.1]: "IPython is needed to transform IPython syntax to pure Python."
2020-08-06T18:49:31.263965+00:00 app[web.1]: 2020-08-06 18:49:31,263 Starting Bokeh server version 2.1.1 (running on Tornado 6.0.4)
2020-08-06T18:49:31.266846+00:00 app[web.1]: 2020-08-06 18:49:31,266 User authentication hooks NOT provided (default user enabled)
2020-08-06T18:49:31.277717+00:00 app[web.1]: 2020-08-06 18:49:31,277 Bokeh app running at: http://0.0.0.0:16711/vis_ultrafast_data
2020-08-06T18:49:31.277927+00:00 app[web.1]: 2020-08-06 18:49:31,277 Starting Bokeh server with process id: 4
2020-08-06T18:49:31.525669+00:00 heroku[web.1]: State changed from starting to up
2020-08-06T18:49:32.538309+00:00 heroku[router]: at=info method=GET path="/" host=visud.herokuapp.com request_id=76019c13-478d-4c32-8c4f-3b41eef167bd fwd="31.151.169.49" dyno=web.1 connect=0ms service=9ms status=302 bytes=197 protocol=https
2020-08-06T18:49:32.760141+00:00 app[web.1]: 2020-08-06 18:49:32,759 Error running application handler <bokeh.application.handlers.notebook.NotebookHandler object at 0x7f18c81ef710>: No module named 'matplotlib'
2020-08-06T18:49:32.760167+00:00 app[web.1]: File "vis_ultrafast_data.ipynb", line 14, in <module>:
2020-08-06T18:49:32.760177+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. " Traceback (most recent call last):
2020-08-06T18:49:32.760179+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/bokeh/application/handlers/code_runner.py", line 197, in run
2020-08-06T18:49:32.760180+00:00 app[web.1]: exec(self._code, module.__dict__)
2020-08-06T18:49:32.760180+00:00 app[web.1]: File "/app/vis_ultrafast_data.ipynb", line 14, in <module>
2020-08-06T18:49:32.760181+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. "
2020-08-06T18:49:32.760181+00:00 app[web.1]: ModuleNotFoundError: No module named 'matplotlib'
2020-08-06T18:49:32.760182+00:00 app[web.1]: 
2020-08-06T18:49:32.772732+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data" host=visud.herokuapp.com request_id=96b66b3d-19b4-4f25-868c-530a9e831f76 fwd="31.151.169.49" dyno=web.1 connect=0ms service=28ms status=200 bytes=27101 protocol=https
2020-08-06T18:49:36.494658+00:00 app[web.1]: 2020-08-06 18:49:36,494 WebSocket connection opened
2020-08-06T18:49:36.497244+00:00 app[web.1]: 2020-08-06 18:49:36,497 ServerConnection created
2020-08-06T18:49:39.813220+00:00 app[web.1]: 2020-08-06 18:49:39,812 Error running application handler <bokeh.application.handlers.notebook.NotebookHandler object at 0x7f18c81ef710>: No module named 'matplotlib'
2020-08-06T18:49:39.813231+00:00 app[web.1]: File "vis_ultrafast_data.ipynb", line 14, in <module>:
2020-08-06T18:49:39.813232+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. " Traceback (most recent call last):
2020-08-06T18:49:39.813234+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/bokeh/application/handlers/code_runner.py", line 197, in run
2020-08-06T18:49:39.813234+00:00 app[web.1]: exec(self._code, module.__dict__)
2020-08-06T18:49:39.813235+00:00 app[web.1]: File "/app/vis_ultrafast_data.ipynb", line 14, in <module>
2020-08-06T18:49:39.813235+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. "
2020-08-06T18:49:39.813236+00:00 app[web.1]: ModuleNotFoundError: No module named 'matplotlib'
2020-08-06T18:49:39.813242+00:00 app[web.1]: 
2020-08-06T18:49:39.824568+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data" host=visud.herokuapp.com request_id=3a133857-df49-4d73-ab6e-db86455744e3 fwd="31.151.169.49" dyno=web.1 connect=1ms service=20ms status=200 bytes=27141 protocol=https
2020-08-06T18:49:39.965345+00:00 app[web.1]: 2020-08-06 18:49:39,965 Error running application handler <bokeh.application.handlers.notebook.NotebookHandler object at 0x7f18c81ef710>: No module named 'matplotlib'
2020-08-06T18:49:39.965347+00:00 app[web.1]: File "vis_ultrafast_data.ipynb", line 14, in <module>:
2020-08-06T18:49:39.965348+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. " Traceback (most recent call last):
2020-08-06T18:49:39.965349+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/bokeh/application/handlers/code_runner.py", line 197, in run
2020-08-06T18:49:39.965349+00:00 app[web.1]: exec(self._code, module.__dict__)
2020-08-06T18:49:39.965350+00:00 app[web.1]: File "/app/vis_ultrafast_data.ipynb", line 14, in <module>
2020-08-06T18:49:39.965350+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. "
2020-08-06T18:49:39.965351+00:00 app[web.1]: ModuleNotFoundError: No module named 'matplotlib'
2020-08-06T18:49:39.965399+00:00 app[web.1]: 
2020-08-06T18:49:39.977708+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data" host=visud.herokuapp.com request_id=6da0a6ff-711c-4a9e-a284-53da62c40688 fwd="31.151.169.49" dyno=web.1 connect=0ms service=18ms status=200 bytes=27141 protocol=https
2020-08-06T18:49:40.117937+00:00 app[web.1]: 2020-08-06 18:49:40,117 WebSocket connection closed: code=1001, reason=None
2020-08-06T18:49:40.121077+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data/ws" host=visud.herokuapp.com request_id=0bfd114d-f5d5-46ad-9db2-ea44b153c9d5 fwd="31.151.169.49" dyno=web.1 connect=1ms service=3629ms status=101 bytes=226 protocol=https
2020-08-06T18:49:40.518095+00:00 app[web.1]: 2020-08-06 18:49:40,517 WebSocket connection opened
2020-08-06T18:49:40.518680+00:00 app[web.1]: 2020-08-06 18:49:40,518 ServerConnection created
2020-08-06T18:49:42.474876+00:00 app[web.1]: 2020-08-06 18:49:42,474 Error running application handler <bokeh.application.handlers.notebook.NotebookHandler object at 0x7f18c81ef710>: No module named 'matplotlib'
2020-08-06T18:49:42.474888+00:00 app[web.1]: File "vis_ultrafast_data.ipynb", line 14, in <module>:
2020-08-06T18:49:42.474893+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. " Traceback (most recent call last):
2020-08-06T18:49:42.474894+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/bokeh/application/handlers/code_runner.py", line 197, in run
2020-08-06T18:49:42.474895+00:00 app[web.1]: exec(self._code, module.__dict__)
2020-08-06T18:49:42.474895+00:00 app[web.1]: File "/app/vis_ultrafast_data.ipynb", line 14, in <module>
2020-08-06T18:49:42.474895+00:00 app[web.1]: "Lets first import our transient absorption data. In this case, data file is tab delimited. First row is pixel (wavelength) axis (in nanometer), the first column is time axis (in seconds). Following code creates an interactive figure for time-traces. "
2020-08-06T18:49:42.474896+00:00 app[web.1]: ModuleNotFoundError: No module named 'matplotlib'
2020-08-06T18:49:42.474904+00:00 app[web.1]: 
2020-08-06T18:49:42.484567+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data" host=visud.herokuapp.com request_id=b9747cd6-ae2d-4728-a54a-c7ecb3f6042a fwd="31.151.169.49" dyno=web.1 connect=0ms service=13ms status=200 bytes=27141 protocol=https
2020-08-06T18:49:42.609502+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data/ws" host=visud.herokuapp.com request_id=7f8d60e5-3c22-4a70-a89d-95beb601c62c fwd="31.151.169.49" dyno=web.1 connect=1ms service=2094ms status=101 bytes=474 protocol=https
2020-08-06T18:49:42.610839+00:00 app[web.1]: 2020-08-06 18:49:42,610 WebSocket connection closed: code=1001, reason=None
2020-08-06T18:49:43.025325+00:00 app[web.1]: 2020-08-06 18:49:43,025 WebSocket connection opened
2020-08-06T18:49:43.025793+00:00 app[web.1]: 2020-08-06 18:49:43,025 ServerConnection created
2020-08-06T18:50:21.476754+00:00 heroku[router]: at=info method=GET path="/vis_ultrafast_data/ws" host=visud.herokuapp.com request_id=53a4cd81-8168-48c7-9d62-c4080a9c3c53 fwd="31.151.169.49" dyno=web.1 connect=0ms service=38452ms status=101 bytes=477 protocol=https
2020-08-06T18:50:21.483175+00:00 app[web.1]: 2020-08-06 18:50:21,482 WebSocket connection closed: code=1001, reason=None

Answer 1

確保包括

matplotlib==3.1.3

在您上傳到 heroku 的“requirements.txt”中

Answer 2

最后我讓它工作了。 我清理了我的 jupyter notebook 代碼，並注意到我不再需要導入matplotlib因為我從不使用它。

接下來，即使我將更改推送到 heroku，它仍然在抱怨 matplotlib。 我刪除了 heroku 應用程序並創建了一個新應用程序。 然后將更改推送到 heroku 主控。 哇啦！ 有效！

我的需求文件包含三個部分；

panel
hvplot
nbconvert

這個 github repo也幫助了我很多。