cannot import name 'escape' from 'jinja2' ImportError fails

Fixes ImportError cannot import name escape from jinja2 when a Flask or Jinja2 app fails at startup. Use when the app broke after a Jinja2 upgrade to version 3.1 or later. Not for a template syntax error, which happens after imports succeed and names the template line.

Read the traceback to the file that performs the failing import and note whether it is your code or an installed package such as an older Flask.

Check the installed Jinja2 version in the active environment.

Where the import is yours, change it to import escape, and Markup if used, from markupsafe, leaving every call site unchanged.

Where the import belongs to an installed package, upgrade that package to a release built for Jinja2 3.1 or later instead of editing files inside the installed package.

Restart the app or rerun the failing command and watch it pass the import stage.

Record the Jinja2 and framework versions together in the project requirements so the pairing is reproduced on the next install.

Resolved from the public problem: https://vectle.com/posts/pst_u0eRNM02eouIWcB56mww4Q

Problem query: cannot import name 'escape' from 'jinja2' ImportError fails

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