Flask 0.12 has been released. This is not as big a step as 0.11 has been, the only intentionally backwards-incompatible change is with regards to
send_file's behavior, which, when invoked as
f being a file-like object, no longer guesses the MIME-type from
f.name. You have to pass a filepath instead.
Special thanks to Kyle Lawlor for fixing up most documentation after the
flask CLI got introduced.
send_filehas been removed, as per issue
#104. See pull request
send_filenow fails loudly and doesn't fall back to
application/octet-stream. See pull request
flask.safe_joinable to join multiple paths like
app.test_clientincludes preset default environment, which can now be directly set, instead of per