Please, help - the next update fails. Many previous updates worked fine, but now:
Backing up sites…
/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/cryptography/hazmat/primitives/constant_time.py:26: CryptographyDeprecationWarning: Support for your Python version is deprecated. The next version of cryptography will remove support. Please upgrade to a 2.7.x release that supports hmac.compare_digest as soon as possible.
utils.DeprecatedIn23,
INFO:bench.app:pulling frappe
$ git pull upstream version-11
From GitHub - frappe/frappe: Low code web framework for real world applications, in Python and Javascript
- branch version-11 → FETCH_HEAD
Already up-to-date.
$ find . -name “*.pyc” -delete
INFO:bench.app:pulling erpnext
$ git pull upstream version-11
From GitHub - frappe/erpnext: Free and Open Source Enterprise Resource Planning (ERP) - branch version-11 → FETCH_HEAD
Already up-to-date.
$ find . -name “*.pyc” -delete
INFO:bench.app:pulling erpnext_demo
$ git pull upstream master
From GitHub - frappe/erpnext_demo: Deprecated with Version 7 (will work till v6) - branch master → FETCH_HEAD
Already up-to-date.
$ find . -name “*.pyc” -delete
Updating Python libraries…
$ /home/frappe/frappe-bench/env/bin/pip install -q -U pip
/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/cryptography/hazmat/primitives/constant_time.py:26: CryptographyDeprecationWarning: Support for your Python version is deprecated. The next version of cryptography will remove support. Please upgrade to a 2.7.x release that supports hmac.compare_digest as soon as possible.
utils.DeprecatedIn23,
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
INFO:bench.app:installing frappe
$ /home/frappe/frappe-bench/env/bin/pip install -q -U -e /home/frappe/frappe-bench/apps/frappe
/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/cryptography/hazmat/primitives/constant_time.py:26: CryptographyDeprecationWarning: Support for your Python version is deprecated. The next version of cryptography will remove support. Please upgrade to a 2.7.x release that supports hmac.compare_digest as soon as possible.
utils.DeprecatedIn23,
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
ERROR: Exception:
Traceback (most recent call last):
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/cli/base_command.py”, line 188, in _main
status = self.run(options, args)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/cli/req_command.py”, line 185, in wrapper
return func(self, options, args)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/commands/install.py”, line 333, in run
reqs, check_supported_wheels=not options.target_dir
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py”, line 179, in resolve
discovered_reqs.extend(self._resolve_one(requirement_set, req))
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py”, line 362, in _resolve_one
abstract_dist = self._get_abstract_dist_for(req_to_install)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py”, line 314, in _get_abstract_dist_for
abstract_dist = self.preparer.prepare_linked_requirement(req)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/operations/prepare.py”, line 488, in prepare_linked_requirement
req, self.req_tracker, self.finder, self.build_isolation,
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/operations/prepare.py”, line 91, in _get_prepared_distribution
abstract_dist.prepare_distribution_metadata(finder, build_isolation)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/distributions/sdist.py”, line 38, in prepare_distribution_metadata
self._setup_isolation(finder)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_internal/distributions/sdist.py”, line 96, in _setup_isolation
reqs = backend.get_requires_for_build_wheel()
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_vendor/pep517/wrappers.py”, line 161, in get_requires_for_build_wheel
‘config_settings’: config_settings
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pip/_vendor/pep517/wrappers.py”, line 265, in _call_hook
raise BackendUnavailable(data.get(‘traceback’, ‘’))
BackendUnavailable