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connexion

Connexion, British spelling of the word meaning a link or association, refers to the act or state of being connected. In modern English, the American variant "connection" is more common, while "connexion" survives mainly in British English or historical contexts, appearing in various technical and formal writings.

In computing, Connexion is the name of an open-source Python framework for building APIs from OpenAPI specifications

Connexion is used to support a contract-first approach to API development, emphasizing a clear separation between

(formerly
called
Swagger).
It
allows
developers
to
define
the
API
contract
in
an
OpenAPI
document
and
then
implement
the
business
logic
as
Python
functions.
Connexion
maps
each
operation
in
the
specification
to
a
corresponding
Python
function,
handling
request
parsing,
parameter
validation,
and
response
formatting
according
to
the
spec.
It
typically
runs
on
top
of
the
Flask
web
framework,
though
it
can
be
configured
to
work
with
other
WSGI
frameworks.
The
framework
also
provides
automatic
generation
of
interactive
API
documentation
via
Swagger
UI
and
supports
features
such
as
authentication
schemes,
error
handling,
and
validation
of
input
and
output
data.
the
API
specification
and
its
implementation.
It
is
maintained
as
an
open-source
project
and
has
been
adopted
in
various
Python-based
services
and
microservices
architectures,
particularly
where
rapid
API
development
and
explicit
contracts
are
valued.