Locust stopped working after Flast 2.0 got released

[stanislawskwark]

in setup.py I can see:
"flask>=1.1.2",
I guess it should be hardcoded to ==1.1.2 for now.

it crashes with:

File "/root/.local/share/virtualenvs/xxxxxxx/lib/python3.6/site-packages/locust/web.py", line 102, in __init__
app.jinja_options["extensions"].append("jinja2.ext.do")
KeyError: 'extensions'

[bernicecpz]

I also faced the same error, I tried to google for a solution.

Based on what chfaber shared in this StackOverflow post , the workaround would be to replace app.jinja_options['extensions'].append('jinja2.ext.do') with app.jinja_env.add_extension('jinja2.ext.do')

However, I am not familiar with how Flask and Jinja work together, so I can't offer much explanation. Hope this still helps!