Pyinstaller Syntax error: 'yield' inside async function (Python 3.5.1)

Question

I am trying to use pyinstaller to create a single executable to distribute to users without Python installed.

The script is a very simple one and just t

Answer 1

I got the same error.

The reason is Jinja2 added new async function for Python3.6 in version 2.9.

Please see http://jinja.pocoo.org/docs/2.9/changelog/#version-2-9-6

There are two ways to avoid this error. Both of these worked for me.

1. Downgrade jinja2

      # using Anaconda
      conda install jinja2=2.8.1
   
      # using pip
      pip install jinja2==2.8.1
   

2. Install dev version of PyInstaller

     # install from github
     # Don't run "pip install -U pyinstaller" because the dev version is not released yet
     pip install git+https://github.com/pyinstaller/pyinstaller.git
   
     # check if "PyInstaller (3.3.dev0+g483dfde)" is in the list
     pip list