2023-09-13T06:33:30,124 Created temporary directory: /tmp/pip-build-tracker-jkql5xs2
2023-09-13T06:33:30,125 Initialized build tracking at /tmp/pip-build-tracker-jkql5xs2
2023-09-13T06:33:30,125 Created build tracker: /tmp/pip-build-tracker-jkql5xs2
2023-09-13T06:33:30,126 Entered build tracker: /tmp/pip-build-tracker-jkql5xs2
2023-09-13T06:33:30,127 Created temporary directory: /tmp/pip-wheel-hwxgjmyr
2023-09-13T06:33:30,130 Created temporary directory: /tmp/pip-ephem-wheel-cache-533fsr4j
2023-09-13T06:33:30,151 Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
2023-09-13T06:33:30,155 2 location(s) to search for versions of tednet:
2023-09-13T06:33:30,155 * https://pypi.org/simple/tednet/
2023-09-13T06:33:30,155 * https://www.piwheels.org/simple/tednet/
2023-09-13T06:33:30,156 Fetching project page and analyzing links: https://pypi.org/simple/tednet/
2023-09-13T06:33:30,157 Getting page https://pypi.org/simple/tednet/
2023-09-13T06:33:30,158 Found index url https://pypi.org/simple/
2023-09-13T06:33:30,299 Fetched page https://pypi.org/simple/tednet/ as application/vnd.pypi.simple.v1+json
2023-09-13T06:33:30,303   Skipping link: No binaries permitted for tednet: https://files.pythonhosted.org/packages/e1/2f/74d2b2961eb6b4a6ba2d3a541b5f0523f68cb125ee77b7bb150704e64e5b/tednet-0.0.1-py3-none-any.whl (from https://pypi.org/simple/tednet/)
2023-09-13T06:33:30,304   Found link https://files.pythonhosted.org/packages/77/c2/e225fefaa70c9dfbb6fa9ff42225af161db21873c7c2bd1a539a4c60d998/tednet-0.0.1.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.1
2023-09-13T06:33:30,305   Skipping link: No binaries permitted for tednet: https://files.pythonhosted.org/packages/a7/bb/9e36ed50d1d7c0b97bea83f306532de693a38825790ebe7caa91a5bcb780/tednet-0.0.2-py3-none-any.whl (from https://pypi.org/simple/tednet/)
2023-09-13T06:33:30,305   Found link https://files.pythonhosted.org/packages/d2/bd/e3b3a7da5c0526cc80ea2f31cb5a92d4ca8a5ddf5f907b45aadf8f1d0abf/tednet-0.0.2.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.2
2023-09-13T06:33:30,306   Found link https://files.pythonhosted.org/packages/69/65/4cbf5385a1fa14522b14ec9ad7706f77cf97fa13ec25dae588d181ed2013/tednet-0.0.3.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.3
2023-09-13T06:33:30,306   Found link https://files.pythonhosted.org/packages/19/2b/9fa90a84eb745a37b2f11b38bcef532b235eaa554acadfb2a112900e3244/tednet-0.0.4.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.4
2023-09-13T06:33:30,307   Found link https://files.pythonhosted.org/packages/a1/d6/ee271ec2b43820b193bc6b6d89e2b0aaac362b651a5fb358b399a1aea449/tednet-0.0.5.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.5
2023-09-13T06:33:30,308   Found link https://files.pythonhosted.org/packages/83/01/87a55bb29479d50e0df709aa0284b13ce9fb431992fc51cb6d4d34bf8e7c/tednet-0.0.6.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.6
2023-09-13T06:33:30,309   Found link https://files.pythonhosted.org/packages/13/e9/a65be7f4cadee0aa38233a43e21011173e6e9b82add220fd06d24dfc14dd/tednet-0.0.7.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.7
2023-09-13T06:33:30,310   Skipping link: No binaries permitted for tednet: https://files.pythonhosted.org/packages/3a/e0/a09fab04af3b5a3efdb2bdd56aecf5d43ec5ff26f7df6da00d2d0e0773de/tednet-0.0.8-py3-none-any.whl (from https://pypi.org/simple/tednet/)
2023-09-13T06:33:30,311   Found link https://files.pythonhosted.org/packages/c3/62/e9f8f51f1e33908fd60ab192f45589dd3ba29c27154d04efb6052aafb5d3/tednet-0.0.8.tar.gz (from https://pypi.org/simple/tednet/), version: 0.0.8
2023-09-13T06:33:30,311   Skipping link: No binaries permitted for tednet: https://files.pythonhosted.org/packages/89/1d/a4da864125e682bd7d0c6ded0fac48e6d7b7bf52906c040e267cc31edaa0/tednet-0.1.0-py3-none-any.whl (from https://pypi.org/simple/tednet/)
2023-09-13T06:33:30,312   Found link https://files.pythonhosted.org/packages/0c/00/cc1517ee38df174d3908e112dd758737129abe6847cdbce982cd729a8245/tednet-0.1.0.tar.gz (from https://pypi.org/simple/tednet/), version: 0.1.0
2023-09-13T06:33:30,312   Skipping link: No binaries permitted for tednet: https://files.pythonhosted.org/packages/8a/62/1daae367dc807d33c0698890a21ceda412bad545bb436e0b884be06f0141/tednet-0.1.1-py3-none-any.whl (from https://pypi.org/simple/tednet/)
2023-09-13T06:33:30,313   Found link https://files.pythonhosted.org/packages/4b/de/868b3df0250966802b3cb448fd7aa6192b12a89c81a139eb9b451291e7e8/tednet-0.1.1.tar.gz (from https://pypi.org/simple/tednet/), version: 0.1.1
2023-09-13T06:33:30,314   Skipping link: No binaries permitted for tednet: https://files.pythonhosted.org/packages/9b/ee/da447812785037a850bbcb4f96befb70c1f8e98e75592b7706a1acae9ecb/tednet-0.1.2-py3-none-any.whl (from https://pypi.org/simple/tednet/)
2023-09-13T06:33:30,314   Found link https://files.pythonhosted.org/packages/a6/ea/9eebfecbef31ec61a0525862372209453fdbeca10e2b1880fe08ebd41581/tednet-0.1.2.tar.gz (from https://pypi.org/simple/tednet/), version: 0.1.2
2023-09-13T06:33:30,315   Skipping link: No binaries permitted for tednet: https://files.pythonhosted.org/packages/f1/64/4ff163b1c3340185a8748586eb18af46f75eed2f26025c009fc7a115856e/tednet-0.1.3-py3-none-any.whl (from https://pypi.org/simple/tednet/)
2023-09-13T06:33:30,315   Found link https://files.pythonhosted.org/packages/f8/29/ddb3922c35dab1dba45493ebdd044860e56837626a142a1b8aec08d97da9/tednet-0.1.3.tar.gz (from https://pypi.org/simple/tednet/), version: 0.1.3
2023-09-13T06:33:30,316 Fetching project page and analyzing links: https://www.piwheels.org/simple/tednet/
2023-09-13T06:33:30,317 Getting page https://www.piwheels.org/simple/tednet/
2023-09-13T06:33:30,318 Found index url https://www.piwheels.org/simple/
2023-09-13T06:33:30,571 Fetched page https://www.piwheels.org/simple/tednet/ as text/html
2023-09-13T06:33:30,574   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.0.1-py3-none-any.whl#sha256=48886cd656667b70d85f9634cfc8be85d27ed67f9650bf405b9871848c77b438 (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,575   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.0.2-py3-none-any.whl#sha256=1e7d142baf29c33843854d1202eb4a6b57b3a2e06f62ae07a2739ee8807de4af (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,575   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.0.3-py3-none-any.whl#sha256=31aced522df83e5b3877f25e64094cf5bd17f70fdc90cec143cfe1293d964dce (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,576   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.0.8-py3-none-any.whl#sha256=cb5d76256649c72f4797846054ba8a6c055f9a52b7bd9c36f9736abe81004391 (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,577   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.1.0-py3-none-any.whl#sha256=d31ca6f4e135a650ab2aaea000c155ffe9c82db4ed2a46858ee783eb5868057f (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,577   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.1.1-py3-none-any.whl#sha256=9f36e98e99a6fb6a6cce852766321492a1a41b713c996367e14fa9d8daa6d1e4 (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,578   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.1.2-py3-none-any.whl#sha256=274a440b09a2c4aaddc0eb979449cb0e6bcce28ba4aaeaf19191f9c3f1ee5024 (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,579   Skipping link: No binaries permitted for tednet: https://www.piwheels.org/simple/tednet/tednet-0.1.3-py3-none-any.whl#sha256=93d13689322a55f8ee4d01f2415bcc119c15bf1463ae203372b5e16e412c77a8 (from https://www.piwheels.org/simple/tednet/)
2023-09-13T06:33:30,579 Skipping link: not a file: https://www.piwheels.org/simple/tednet/
2023-09-13T06:33:30,580 Skipping link: not a file: https://pypi.org/simple/tednet/
2023-09-13T06:33:30,599 Given no hashes to check 1 links for project 'tednet': discarding no candidates
2023-09-13T06:33:30,617 Collecting tednet==0.0.5
2023-09-13T06:33:30,620   Created temporary directory: /tmp/pip-unpack-1vo7xd1h
2023-09-13T06:33:30,835   Downloading tednet-0.0.5.tar.gz (15 kB)
2023-09-13T06:33:30,913   Added tednet==0.0.5 from https://files.pythonhosted.org/packages/a1/d6/ee271ec2b43820b193bc6b6d89e2b0aaac362b651a5fb358b399a1aea449/tednet-0.0.5.tar.gz to build tracker '/tmp/pip-build-tracker-jkql5xs2'
2023-09-13T06:33:30,914   Running setup.py (path:/tmp/pip-wheel-hwxgjmyr/tednet_52f44bc59f594e779e84755f41cbedb0/setup.py) egg_info for package tednet
2023-09-13T06:33:30,915   Created temporary directory: /tmp/pip-pip-egg-info-htm9q4_b
2023-09-13T06:33:30,916   Preparing metadata (setup.py): started
2023-09-13T06:33:30,917   Running command python setup.py egg_info
2023-09-13T06:33:31,340   Traceback (most recent call last):
2023-09-13T06:33:31,340     File "<string>", line 2, in <module>
2023-09-13T06:33:31,341     File "<pip-setuptools-caller>", line 34, in <module>
2023-09-13T06:33:31,343     File "/tmp/pip-wheel-hwxgjmyr/tednet_52f44bc59f594e779e84755f41cbedb0/setup.py", line 4, in <module>
2023-09-13T06:33:31,344       from tednet import __author__, __version__
2023-09-13T06:33:31,345     File "/tmp/pip-wheel-hwxgjmyr/tednet_52f44bc59f594e779e84755f41cbedb0/tednet/__init__.py", line 7, in <module>
2023-09-13T06:33:31,346       from ._ops import *
2023-09-13T06:33:31,347     File "/tmp/pip-wheel-hwxgjmyr/tednet_52f44bc59f594e779e84755f41cbedb0/tednet/_ops.py", line 3, in <module>
2023-09-13T06:33:31,348       import torch
2023-09-13T06:33:31,349   ModuleNotFoundError: No module named 'torch'
2023-09-13T06:33:31,413   ERROR: [present-rich] python setup.py egg_info exited with 1
2023-09-13T06:33:31,426   [bold magenta]full command[/]: [blue]/usr/bin/python3 -c '
2023-09-13T06:33:31,426   exec(compile('"'"''"'"''"'"'
2023-09-13T06:33:31,426   # This is <pip-setuptools-caller> -- a caller that pip uses to run setup.py
2023-09-13T06:33:31,426   #
2023-09-13T06:33:31,426   # - It imports setuptools before invoking setup.py, to enable projects that directly
2023-09-13T06:33:31,426   #   import from `distutils.core` to work with newer packaging standards.
2023-09-13T06:33:31,426   # - It provides a clear error message when setuptools is not installed.
2023-09-13T06:33:31,426   # - It sets `sys.argv[0]` to the underlying `setup.py`, when invoking `setup.py` so
2023-09-13T06:33:31,426   #   setuptools doesn'"'"'t think the script is `-c`. This avoids the following warning:
2023-09-13T06:33:31,426   #     manifest_maker: standard file '"'"'-c'"'"' not found".
2023-09-13T06:33:31,426   # - It generates a shim setup.py, for handling setup.cfg-only projects.
2023-09-13T06:33:31,426   import os, sys, tokenize
2023-09-13T06:33:31,426   
2023-09-13T06:33:31,426   try:
2023-09-13T06:33:31,426       import setuptools
2023-09-13T06:33:31,426   except ImportError as error:
2023-09-13T06:33:31,426       print(
2023-09-13T06:33:31,426           "ERROR: Can not execute `setup.py` since setuptools is not available in "
2023-09-13T06:33:31,426           "the build environment.",
2023-09-13T06:33:31,426           file=sys.stderr,
2023-09-13T06:33:31,426       )
2023-09-13T06:33:31,426       sys.exit(1)
2023-09-13T06:33:31,426   
2023-09-13T06:33:31,426   __file__ = %r
2023-09-13T06:33:31,426   sys.argv[0] = __file__
2023-09-13T06:33:31,426   
2023-09-13T06:33:31,426   if os.path.exists(__file__):
2023-09-13T06:33:31,426       filename = __file__
2023-09-13T06:33:31,426       with tokenize.open(__file__) as f:
2023-09-13T06:33:31,426           setup_py_code = f.read()
2023-09-13T06:33:31,426   else:
2023-09-13T06:33:31,426       filename = "<auto-generated setuptools caller>"
2023-09-13T06:33:31,426       setup_py_code = "from setuptools import setup; setup()"
2023-09-13T06:33:31,426   
2023-09-13T06:33:31,426   exec(compile(setup_py_code, filename, "exec"))
2023-09-13T06:33:31,426   '"'"''"'"''"'"' % ('"'"'/tmp/pip-wheel-hwxgjmyr/tednet_52f44bc59f594e779e84755f41cbedb0/setup.py'"'"',), "<pip-setuptools-caller>", "exec"))' egg_info --egg-base /tmp/pip-pip-egg-info-htm9q4_b[/]
2023-09-13T06:33:31,427   [bold magenta]cwd[/]: /tmp/pip-wheel-hwxgjmyr/tednet_52f44bc59f594e779e84755f41cbedb0/
2023-09-13T06:33:31,429   Preparing metadata (setup.py): finished with status 'error'
2023-09-13T06:33:31,430 ERROR: [present-rich] metadata generation failed
2023-09-13T06:33:31,436 Exception information:
2023-09-13T06:33:31,436 Traceback (most recent call last):
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/operations/build/metadata_legacy.py", line 64, in generate_metadata
2023-09-13T06:33:31,436     call_subprocess(
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/utils/subprocess.py", line 224, in call_subprocess
2023-09-13T06:33:31,436     raise error
2023-09-13T06:33:31,436 pip._internal.exceptions.InstallationSubprocessError: python setup.py egg_info exited with 1
2023-09-13T06:33:31,436 
2023-09-13T06:33:31,436 The above exception was the direct cause of the following exception:
2023-09-13T06:33:31,436 
2023-09-13T06:33:31,436 Traceback (most recent call last):
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/cli/base_command.py", line 180, in exc_logging_wrapper
2023-09-13T06:33:31,436     status = run_func(*args)
2023-09-13T06:33:31,436              ^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/cli/req_command.py", line 248, in wrapper
2023-09-13T06:33:31,436     return func(self, options, args)
2023-09-13T06:33:31,436            ^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/commands/wheel.py", line 147, in run
2023-09-13T06:33:31,436     requirement_set = resolver.resolve(reqs, check_supported_wheels=True)
2023-09-13T06:33:31,436                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/resolver.py", line 92, in resolve
2023-09-13T06:33:31,436     result = self._result = resolver.resolve(
2023-09-13T06:33:31,436                             ^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_vendor/resolvelib/resolvers.py", line 546, in resolve
2023-09-13T06:33:31,436     state = resolution.resolve(requirements, max_rounds=max_rounds)
2023-09-13T06:33:31,436             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_vendor/resolvelib/resolvers.py", line 397, in resolve
2023-09-13T06:33:31,436     self._add_to_criteria(self.state.criteria, r, parent=None)
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_vendor/resolvelib/resolvers.py", line 173, in _add_to_criteria
2023-09-13T06:33:31,436     if not criterion.candidates:
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_vendor/resolvelib/structs.py", line 156, in __bool__
2023-09-13T06:33:31,436     return bool(self._sequence)
2023-09-13T06:33:31,436            ^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 155, in __bool__
2023-09-13T06:33:31,436     return any(self)
2023-09-13T06:33:31,436            ^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 143, in <genexpr>
2023-09-13T06:33:31,436     return (c for c in iterator if id(c) not in self._incompatible_ids)
2023-09-13T06:33:31,436            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 47, in _iter_built
2023-09-13T06:33:31,436     candidate = func()
2023-09-13T06:33:31,436                 ^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/factory.py", line 206, in _make_candidate_from_link
2023-09-13T06:33:31,436     self._link_candidate_cache[link] = LinkCandidate(
2023-09-13T06:33:31,436                                        ^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/candidates.py", line 293, in __init__
2023-09-13T06:33:31,436     super().__init__(
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/candidates.py", line 156, in __init__
2023-09-13T06:33:31,436     self.dist = self._prepare()
2023-09-13T06:33:31,436                 ^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/candidates.py", line 225, in _prepare
2023-09-13T06:33:31,436     dist = self._prepare_distribution()
2023-09-13T06:33:31,436            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/resolution/resolvelib/candidates.py", line 304, in _prepare_distribution
2023-09-13T06:33:31,436     return preparer.prepare_linked_requirement(self._ireq, parallel_builds=True)
2023-09-13T06:33:31,436            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/operations/prepare.py", line 538, in prepare_linked_requirement
2023-09-13T06:33:31,436     return self._prepare_linked_requirement(req, parallel_builds)
2023-09-13T06:33:31,436            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/operations/prepare.py", line 653, in _prepare_linked_requirement
2023-09-13T06:33:31,436     dist = _get_prepared_distribution(
2023-09-13T06:33:31,436            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/operations/prepare.py", line 69, in _get_prepared_distribution
2023-09-13T06:33:31,436     abstract_dist.prepare_distribution_metadata(
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/distributions/sdist.py", line 61, in prepare_distribution_metadata
2023-09-13T06:33:31,436     self.req.prepare_metadata()
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/req/req_install.py", line 568, in prepare_metadata
2023-09-13T06:33:31,436     self.metadata_directory = generate_metadata_legacy(
2023-09-13T06:33:31,436                               ^^^^^^^^^^^^^^^^^^^^^^^^^
2023-09-13T06:33:31,436   File "/usr/local/lib/python3.11/dist-packages/pip/_internal/operations/build/metadata_legacy.py", line 71, in generate_metadata
2023-09-13T06:33:31,436     raise MetadataGenerationFailed(package_details=details) from error
2023-09-13T06:33:31,436 pip._internal.exceptions.MetadataGenerationFailed: metadata generation failed
2023-09-13T06:33:31,451 Removed tednet==0.0.5 from https://files.pythonhosted.org/packages/a1/d6/ee271ec2b43820b193bc6b6d89e2b0aaac362b651a5fb358b399a1aea449/tednet-0.0.5.tar.gz from build tracker '/tmp/pip-build-tracker-jkql5xs2'
2023-09-13T06:33:31,452 Removed build tracker: '/tmp/pip-build-tracker-jkql5xs2'