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35 lines
940 B
Python
35 lines
940 B
Python
"""Import basic exposure of libzmq C API as a backend"""
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# Copyright (C) PyZMQ Developers
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# Distributed under the terms of the Modified BSD License.
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import os
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import platform
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from .select import public_api, select_backend
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if 'PYZMQ_BACKEND' in os.environ:
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backend = os.environ['PYZMQ_BACKEND']
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if backend in ('cython', 'cffi'):
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backend = f'zmq.backend.{backend}'
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_ns = select_backend(backend)
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else:
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# default to cython, fallback to cffi
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# (reverse on PyPy)
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if platform.python_implementation() == 'PyPy':
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first, second = ('zmq.backend.cffi', 'zmq.backend.cython')
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else:
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first, second = ('zmq.backend.cython', 'zmq.backend.cffi')
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try:
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_ns = select_backend(first)
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except Exception as original_error:
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try:
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_ns = select_backend(second)
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except ImportError:
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raise original_error from None
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globals().update(_ns)
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__all__ = public_api
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