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Metadata-Version: 2.4 Name: portend Version: 3.1.0 Summary: TCP port monitoring and discovery Home-page: https://github.com/jaraco/portend Author: Jason R. Coombs Author-email: jaraco@jaraco.com Classifier: Development Status :: 5 - Production/Stable Classifier: Intended Audience :: Developers Classifier: License :: OSI Approved :: MIT License Classifier: Programming Language :: Python :: 3 Classifier: Programming Language :: Python :: 3 :: Only Requires-Python: >=3.7 License-File: LICENSE Requires-Dist: tempora>=1.8 Provides-Extra: testing Requires-Dist: pytest>=6; extra == "testing" Requires-Dist: pytest-checkdocs>=2.4; extra == "testing" Requires-Dist: pytest-flake8; extra == "testing" Requires-Dist: pytest-black>=0.3.7; platform_python_implementation != "PyPy" and extra == "testing" Requires-Dist: pytest-cov; extra == "testing" Requires-Dist: pytest-mypy; platform_python_implementation != "PyPy" and extra == "testing" Requires-Dist: pytest-enabler>=1.0.1; extra == "testing" Provides-Extra: docs Requires-Dist: sphinx; extra == "docs" Requires-Dist: jaraco.packaging>=8.2; extra == "docs" Requires-Dist: rst.linker>=1.9; extra == "docs" Dynamic: license-file .. image:: https://img.shields.io/pypi/v/portend.svg :target: `PyPI link`_ .. image:: https://img.shields.io/pypi/pyversions/portend.svg :target: `PyPI link`_ .. _PyPI link: https://pypi.org/project/portend .. image:: https://github.com/jaraco/portend/workflows/tests/badge.svg :target: https://github.com/jaraco/portend/actions?query=workflow%3A%22tests%22 :alt: tests .. image:: https://img.shields.io/badge/code%20style-black-000000.svg :target: https://github.com/psf/black :alt: Code style: Black .. image:: https://readthedocs.org/projects/portend/badge/?version=latest :target: https://portend.readthedocs.io/en/latest/?badge=latest .. image:: https://img.shields.io/badge/skeleton-2021-informational :target: https://blog.jaraco.com/skeleton por·tend pôrˈtend/ verb be a sign or warning that (something, especially something momentous or calamitous) is likely to happen. Usage ===== Use portend to monitor TCP ports for bound or unbound states. For example, to wait for a port to be occupied, timing out after 3 seconds:: portend.occupied('www.google.com', 80, timeout=3) Or to wait for a port to be free, timing out after 5 seconds:: portend.free('::1', 80, timeout=5) The portend may also be executed directly. If the function succeeds, it returns nothing and exits with a status of 0. If it fails, it prints a message and exits with a status of 1. For example:: python -m portend localhost:31923 free (exits immediately) python -m portend -t 1 localhost:31923 occupied (one second passes) Port 31923 not bound on localhost. Portend also exposes a ``find_available_local_port`` for identifying a suitable port for binding locally:: port = portend.find_available_local_port() print(port, "is available for binding") Portend additionally exposes the lower-level port checking functionality in the ``Checker`` class, which currently exposes only one public method, ``assert_free``:: portend.Checker().assert_free('localhost', 31923) If assert_free is passed a host/port combination that is occupied by a bound listener (i.e. a TCP connection is established to that host/port), assert_free will raise a ``PortNotFree`` exception.
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