Bokeh:: RuntimeError: PhantomJS is not present in PATH or BOKEH_PHANTOMJS_PATH

I am trying to export a Bokeh plot to png using their export_png method from bokeh.io, however, I am running into an RuntimeError, stating PhantomJS is not present in PATH or BOKEH_PHANTOMJS_PATH.

I am using the Jupyter notebook environment with Python 3.7.3.

I've tried conda install -c conda-forge phantomjs and conda install -c conda-forge selenium (as well as conda install phantomjs and conda install selenium), but to no avail.

Any help would be appreciated - I am happy to provide more detail!

Here is a segment of the exception below:

//anaconda3/lib/python3.7/site-packages/bokeh/io/webdriver.py in create_phantomjs_webdriver()
     73                                     '("conda install -c bokeh selenium" or "pip install selenium")')
     74 
---> 75         phantomjs_path = detect_phantomjs()
     76         return webdriver.PhantomJS(executable_path=phantomjs_path, service_log_path=devnull)
     77 

//anaconda3/lib/python3.7/site-packages/bokeh/util/dependencies.py in detect_phantomjs(version)
    124     except OSError:
    125         raise RuntimeError('PhantomJS is not present in PATH or BOKEH_PHANTOMJS_PATH. Try "conda install phantomjs" or \
--> 126             "npm install -g phantomjs-prebuilt"')
    127 
    128     return phantomjs_path

RuntimeError: PhantomJS is not present in PATH or BOKEH_PHANTOMJS_PATH. Try "conda install phantomjs" or "npm install -g phantomjs-prebuilt"

Solution

Ok so I figured out a way to handle this issue...

FIRST: try this:
conda install -c conda-forge phantomjs

If that doesn't work, then do the following:

I verified that I had the phantomjs library in my anaconda3 environment (as below). /anaconda3/lib/python3.7/site-packages/phantomjs

The issue is, my Jupyter notebook was working in a environment that was not anaconda3.
So what I did is:

1) conda install nb_conda_kernels
2) Close the anaconda application altogether
3) Open anaconda, and under the "Applications on __________" (upper left dropdown menu in the anaconda main menu view), I selected "anaconda3"
4) Open Jupyter Lab (perhaps Jupyter notebook will also work)
5) Re-executed my code and WALA! it worked.

Let me know if you guys have any questions.