创建虚拟环境报错：
$ virtualenv -p /usr/bin/python3 venv
Already using interpreter /usr/bin/python3
Using base prefix '/usr'
New python executable in /home/biny/venv/bin/python3
Not overwriting existing python script /home/biny/venv/bin/python (you must use /home/biny/venv/bin/python3)
Installing setuptools, pkg_resources, pip, wheel...
Complete output from command /home/biny/venv/bin/python3 - setuptools pkg_resources pip wheel:
Collecting setuptools
Using cached https://files.pythonhosted.org/packages/54/28/c45d8b54c1339f9644b87663945e54a8503cfef59cf0f65b3ff5dd17cf64/setuptools-42.0.2-py2.py3-none-any.whl
Collecting pkg_resources
Exception:
Traceback (most recent call last):
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connection.py", line 137, in _new_conn
(self.host, self.port), self.timeout, **extra_kw)
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/util/connection.py", line 91, in create_connection
raise err
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/util/connection.py", line 81, in create_connection
sock.connect(sa)
OSError: [Errno 101] Network is unreachable
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 560, in urlopen
body=body, headers=headers)
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 346, in _make_request
self._validate_conn(conn)
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 787, in _validate_conn
conn.connect()
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connection.py", line 217, in connect
conn = self._new_conn()
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connection.py", line 146, in _new_conn
self, "Failed to establish a new connection: %s" % e)
requests.packages.urllib3.exceptions.NewConnectionError: <requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f3997014ba8>: Failed to establish a new connection: [Errno 101] Network is unreachable
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/basecommand.py", line 209, in main
status = self.run(options, args)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/commands/install.py", line 328, in run
wb.build(autobuilding=True)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/wheel.py", line 748, in build
self.requirement_set.prepare_files(self.finder)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/req/req_set.py", line 360, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/req/req_set.py", line 512, in _prepare_file
finder, self.upgrade, require_hashes)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/req/req_install.py", line 273, in populate_link
self.link = finder.find_requirement(self, upgrade)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 442, in find_requirement
all_candidates = self.find_all_candidates(req.name)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 400, in find_all_candidates
for page in self._get_pages(url_locations, project_name):
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 545, in _get_pages
page = self._get_page(location)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 648, in _get_page
return HTMLPage.get_page(link, session=self.session)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 757, in get_page
"Cache-Control": "max-age=600",
File "/home/biny/venv/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/sessions.py", line 480, in get
return self.request('GET', url, **kwargs)
File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/download.py", line 378, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/home/biny/venv/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/sessions.py", line 468, in request
resp = self.send(prep, **send_kwargs)
File "/home/biny/venv/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/sessions.py", line 576, in send
r = adapter.send(request, **kwargs)
File "/home/biny/venv/share/python-wheels/CacheControl-0.11.5-py2.py3-none-any.whl/cachecontrol/adapter.py", line 46, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File "/home/biny/venv/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/adapters.py", line 376, in send
timeout=timeout
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 610, in urlopen
_stacktrace=sys.exc_info()[2])
File "/home/biny/venv/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/util/retry.py", line 228, in increment
total -= 1
TypeError: unsupported operand type(s) for -=: 'Retry' and 'int'
----------------------------------------
...Installing setuptools, pkg_resources, pip, wheel...done.
Traceback (most recent call last):
File "/usr/bin/virtualenv", line 9, in <module>
load_entry_point('virtualenv==15.0.1', 'console_scripts', 'virtualenv')()
File "/usr/lib/python3/dist-packages/virtualenv.py", line 719, in main
symlink=options.symlink)
File "/usr/lib/python3/dist-packages/virtualenv.py", line 988, in create_environment
download=download,
File "/usr/lib/python3/dist-packages/virtualenv.py", line 918, in install_wheel
call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
File "/usr/lib/python3/dist-packages/virtualenv.py", line 812, in call_subprocess
% (cmd_desc, proc.returncode))
OSError: Command /home/biny/venv/bin/python3 - setuptools pkg_resources pip wheel failed with error code 2
解决办法：更新pip
$ pip3 -V
$ pip3 install --upgrade pip结果：
$ virtualenv -p /usr/bin/python3 venv
Already using interpreter /usr/bin/python3
Using base prefix '/usr'
New python executable in /home/biny/venv/bin/python3
Not overwriting existing python script /home/biny/venv/bin/python (you must use /home/biny/venv/bin/python3)
Installing setuptools, pkg_resources, pip, wheel...done.