root@zap4:/var/www/html/app/contactsync/sync/InfraMarket# pip install Django==2.1
ERROR: Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 189, in _main
    status = self.run(options, args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 178, in wrapper
    return func(self, options, args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 267, in run
    session = self.get_default_session(options)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 76, in get_default_session
    self._session = self.enter_context(self._build_session(options))
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 93, in _build_session
    index_urls=self._get_index_urls(options),
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/network/session.py", line 245, in __init__
    self.headers["User-Agent"] = user_agent()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/network/session.py", line 132, in user_agent
    zip(["name", "version", "id"], distro.linux_distribution()),
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 125, in linux_distribution
    return _distro.linux_distribution(full_distribution_name)
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 681, in linux_distribution
    self.version(),
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 741, in version
    self.lsb_release_attr('release'),
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 903, in lsb_release_attr
    return self._lsb_release_info.get(attribute, '')
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 556, in __get__
    ret = obj.__dict__[self._fname] = self._f(obj)
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 1014, in _lsb_release_info
    stdout = subprocess.check_output(cmd, stderr=devnull)
  File "/usr/local/lib/python3.6/subprocess.py", line 356, in check_output
    **kwargs).stdout
  File "/usr/local/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1.
Traceback (most recent call last):
  File "/bin/pip", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/main.py", line 73, in main
    return command.main(cmd_args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 111, in main
    return self._main(args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 226, in _main
    self.handle_pip_version_check(options)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 148, in handle_pip_version_check
    timeout=min(5, options.timeout)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 93, in _build_session
    index_urls=self._get_index_urls(options),
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/network/session.py", line 245, in __init__
    self.headers["User-Agent"] = user_agent()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/network/session.py", line 132, in user_agent
    zip(["name", "version", "id"], distro.linux_distribution()),
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 125, in linux_distribution
    return _distro.linux_distribution(full_distribution_name)
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 681, in linux_distribution
    self.version(),
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 741, in version
    self.lsb_release_attr('release'),
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 903, in lsb_release_attr
    return self._lsb_release_info.get(attribute, '')
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 556, in __get__
    ret = obj.__dict__[self._fname] = self._f(obj)
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/distro.py", line 1014, in _lsb_release_info
    stdout = subprocess.check_output(cmd, stderr=devnull)
  File "/usr/local/lib/python3.6/subprocess.py", line 356, in check_output
    **kwargs).stdout
  File "/usr/local/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1.