OSError: [Errno 8] Exec format error - wkhtmltopdf & pydf - python-3.x

Question

I want to use pydf to generate a pdf in Python 3. I tested it out in terminal (Mac) and received the below error. Does anyone know why and what to do?
If possible, I would like to stick with pydf and not have to move to another library.
.
I downloaded the Mac wkhtmltopdf version from https://wkhtmltopdf.org/downloads.html
As well as pydf from pip install python-pdf
>>> import pydf
>>> pydf.generate_pdf('hello')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydf/wkhtmltopdf.py", line 145, in generate_pdf
p = _execute_wk(*cmd_args, input=html.encode())
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydf/wkhtmltopdf.py", line 30, in _execute_wk
return subprocess.run(wk_args, input=input, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 453, in run
with Popen(*popenargs, **kwargs) as process:
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 756, in __init__
restore_signals, start_new_session)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 1499, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
OSError: [Errno 8] Exec format error: '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydf/bin/wkhtmltopdf'
>>>

Answer 1

This is because the binary which is packaged with python-pdf is for linux and will not execute on MacOS, this explained briefly in the README.
Luckily the solution is easy, you need to install wkhtmltopdf via homebrew or similar, then set the WKHTMLTOPDF_PATH environment variable to point to it.
In my case that's
export WKHTMLTOPDF_PATH=/usr/local/bin/wkhtmltopdf