https://github.com/josef-friedrich/stdout_stderr_capturing

Capture the stdout or stderr output as a list in a context manager block (with).
https://github.com/josef-friedrich/stdout_stderr_capturing

Last synced: about 1 month ago
JSON representation

Capture the stdout or stderr output as a list in a context manager block (with).

• Host: GitHub
• URL: https://github.com/josef-friedrich/stdout_stderr_capturing
• Owner: Josef-Friedrich
• License: mit
• Created: 2022-07-15T14:08:35.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-04-13T09:12:35.000Z (9 months ago)
• Last Synced: 2024-11-19T17:58:44.193Z (about 2 months ago)
• Language: Python
• Homepage:
• Size: 51.8 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.rst
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

README

        
.. image:: http://img.shields.io/pypi/v/stdout-stderr-capturing.svg

    :target: https://pypi.org/project/stdout-stderr-capturing

    :alt: This package on the Python Package Index

.. image:: https://github.com/Josef-Friedrich/stdout_stderr_capturing/actions/workflows/tests.yml/badge.svg

    :target: https://github.com/Josef-Friedrich/stdout_stderr_capturing/actions/workflows/tests.yml

    :alt: Tests

stdout_stderr_capturing

=======================

Capture the stdout or stderr output as a list in a context manager block (with).

Maybe better alternatives:

* `capturer `_ https://github.com/xolox/python-capturer

* `stdio-mgr `_

* `OutputCatcher `_

* `wurlitzer `_

With Python 3:

.. code:: python

    from io import StringIO

    from contextlib import redirect_stdout, redirect_stderr

    stdout = StringIO()

    stderr = StringIO()

    with redirect_stdout(stdout), redirect_stderr(stderr):

        print('Test')

        stdout.getvalue()

        stderr.getvalue()

Using `pytest `_

.. code:: python

    def test_myoutput(capsys):  # or use "capfd" for fd-level

        print("hello")

        sys.stderr.write("world\n")

        captured = capsys.readouterr()

        assert captured.out == "hello\n"

        assert captured.err == "world\n"

        print("next")

        captured = capsys.readouterr()

        assert captured.out == "next\n"

Capture stdout:

.. code:: python

    with Capturing() as output:

        print('line 1')

    print(output[0])

is equivalent to

.. code:: python

    with Capturing(stream='stdout') as output:

        print('line 1')

Capture stderr:

.. code:: python

    with Capturing(stream='stderr') as output:

        print('line 1', file=sys.stderr)