Bug Report: mplfinance doesn't import in jupyter notebook

[elizabethexpialadocious]

Describe the bug
mplfinance doesn't import in jupyter notebook

To Reproduce
Steps to reproduce the behavior:

1. at shell: jupyter notebook
2. in browser in jupyter, launch a notebook that imports mplfinance
3. run a line containing "import mplfinance as mpf"
4. error results: ModuleNotFoundError: No module named 'mplfinance'
5. note that "import mplfinance as mpf" works as expected in ipython

Expected behavior
nothing (no error should occur)

Screenshots

Desktop (please complete the following information):

• OS: Raspbian GNU/Linux 10 (buster)
• Browser Firefrox 68.10.0esr (32-bit)
• Version Linux xxx 5.4.51-v8+ #1327 SMP PREEMPT Thu Jul 23 11:11:34 BST 2020 aarch64 GNU/Linux, Python 3.7.3 (virtualenv), jupyter notebook --version 6.1.0
  file /usr/bin/python3.7:
  /usr/bin/python3.7: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, BuildID[sha1]=f6973949a18fc12743cc4397016f28a9580a1417, stripped

Error persists when running 32-bit kernel.

[DanielGoldfarb]

In my experience, unless the module has been misspelled (which doesn't appear to be the case based on your screenshot above), ModuleNotFoundError usually indicates that the install location is not within the search path for importing modules.

Since this is working for you under ipython, so have a simple way to find where your system installed mplfinance:

In [1]: import mplfinance as mpf
In [2]: mpf.__file__

To find out where your system is searching for modules

import sys
print(sys.path)

If you run the above for both ipython and in your jupyter notebook, I am guessing that you will find that sys.path is different for your ipython installation than it is for your jupyter notebook (and that the notebook's search path does not include the install location). This could be for various reasons such as environment variables, where jupyter is installed, whether you are running virtual and/or conda environments, etc. You can read more about the module search path here: https://docs.python.org/3/tutorial/modules.html#the-module-search-path

Note that if you are using a virtual environment, or conda environment, you have to (1) activate the environment before installing mplfinance and (2) activate the environment before running jupyter notebook. It may also be necessary to have a separate install of jupyter notebook in the activated environment (however depending on other path related factors that may or may not be necessary).

Let me know if the above gives you enough information to resolve the issue. If not, please provide the output from the above commands and I will do what I can to help further. All the best. --Daniel

[elizabethexpialadocious]

That did it! Thank you Daniel! A little investigating got me to jupyter/notebook#3311 which suggested my deleting ~/.local/share/jupyter/kernels/python3/kernel.json; I don't know how that got there.
works great! thank you!

[DanielGoldfarb]

Elizabeth,
Glad to hear it. All the best!
--Daniel