From cce638a8adf4e045ca5505afea4bda57753c31dd Mon Sep 17 00:00:00 2001 From: Micah Anderson Date: Mon, 11 Aug 2014 16:33:29 -0400 Subject: initial import of debian package --- zmq/backend/__init__.py | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 zmq/backend/__init__.py (limited to 'zmq/backend/__init__.py') diff --git a/zmq/backend/__init__.py b/zmq/backend/__init__.py new file mode 100644 index 0000000..7cac725 --- /dev/null +++ b/zmq/backend/__init__.py @@ -0,0 +1,45 @@ +"""Import basic exposure of libzmq C API as a backend""" + +# Copyright (C) PyZMQ Developers +# Distributed under the terms of the Modified BSD License. + + +import os +import platform +import sys + +from zmq.utils.sixcerpt import reraise + +from .select import public_api, select_backend + +if 'PYZMQ_BACKEND' in os.environ: + backend = os.environ['PYZMQ_BACKEND'] + if backend in ('cython', 'cffi'): + backend = 'zmq.backend.%s' % backend + _ns = select_backend(backend) +else: + # default to cython, fallback to cffi + # (reverse on PyPy) + if platform.python_implementation() == 'PyPy': + first, second = ('zmq.backend.cffi', 'zmq.backend.cython') + else: + first, second = ('zmq.backend.cython', 'zmq.backend.cffi') + + try: + _ns = select_backend(first) + except Exception: + exc_info = sys.exc_info() + exc = exc_info[1] + try: + _ns = select_backend(second) + except ImportError: + # prevent 'During handling of the above exception...' on py3 + # can't use `raise ... from` on Python 2 + if hasattr(exc, '__cause__'): + exc.__cause__ = None + # raise the *first* error, not the fallback + reraise(*exc_info) + +globals().update(_ns) + +__all__ = public_api -- cgit v1.2.3