ERROR: Command errored out with exit status 2:

[zwy727]

请问对版本配置有什么要求吗
ERROR: Command errored out with exit status 2:
command: /usr/bin/python /usr/lib/python2.7/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-Y2s05p/normal --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- 'pkgconfig>=1.5.1' 'lxml>=3.8' pathlib2
cwd: None
Complete output (42 lines):
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 Please upgrade your Python as Python 2.7 is no longer maintained.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 pip 21.0 will remove support for this functionality.
Collecting pkgconfig>=1.5.1
Using cached pkgconfig-1.5.2-py2.py3-none-any.whl (6.4 kB)
Collecting lxml>=3.8
Downloading lxml-4.6.4-cp27-cp27mu-manylinux_2_5_x86_64.manylinux1_x86_64.whl (5.5 MB)
ERROR: Exception:
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/pip/_internal/cli/base_command.py", line 223, in _main
status = self.run(options, args)
File "/usr/lib/python2.7/site-packages/pip/_internal/cli/req_command.py", line 180, in wrapper
return func(self, options, args)
File "/usr/lib/python2.7/site-packages/pip/_internal/commands/install.py", line 321, in run
reqs, check_supported_wheels=not options.target_dir
File "/usr/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 180, in resolve
discovered_reqs.extend(self._resolve_one(requirement_set, req))
File "/usr/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 385, in _resolve_one
dist = self._get_dist_for(req_to_install)
File "/usr/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 337, in _get_dist_for
dist = self.preparer.prepare_linked_requirement(req)
File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 480, in prepare_linked_requirement
return self._prepare_linked_requirement(req, parallel_builds)
File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 505, in _prepare_linked_requirement
self.download_dir, hashes,
File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 257, in unpack_url
hashes=hashes,
File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 130, in get_http_url
from_path, content_type = download(link, temp_dir.path)
File "/usr/lib/python2.7/site-packages/pip/_internal/network/download.py", line 163, in call
for chunk in chunks:
File "/usr/lib/python2.7/site-packages/pip/_internal/cli/progress_bars.py", line 168, in iter
for x in it:
File "/usr/lib/python2.7/site-packages/pip/_internal/network/utils.py", line 88, in response_chunks
decode_content=False,
File "/usr/lib/python2.7/site-packages/pip/_vendor/urllib3/response.py", line 576, in stream
data = self.read(amt=amt, decode_content=decode_content)
File "/usr/lib/python2.7/site-packages/pip/_vendor/urllib3/response.py", line 541, in read
raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
File "/usr/lib64/python2.7/contextlib.py", line 35, in exit
self.gen.throw(type, value, traceback)
File "/usr/lib/python2.7/site-packages/pip/_vendor/urllib3/response.py", line 451, in _error_catcher
raise ReadTimeoutError(self._pool, None, "Read timed out.")
ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.

ERROR: Command errored out with exit status 2: /usr/bin/python /usr/lib/python2.7/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-Y2s05p/normal --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- 'pkgconfig>=1.5.1' 'lxml>=3.8' pathlib2 Check the logs for full command output.