$ sudo su -
# pip --verbose install ldtp
Collecting ldtp
  Getting page https://pypi.python.org/simple/ldtp/
  Starting new HTTPS connection (1): pypi.python.org
  "GET /simple/ldtp/ HTTP/1.1" 200 345
  1 location(s) to search for versions of ldtp:
  * https://pypi.python.org/simple/ldtp/
  Getting page https://pypi.python.org/simple/ldtp/
  Analyzing links from page https://pypi.python.org/simple/ldtp/
    Found link https://pypi.python.org/packages/source/l/ldtp/ldtp-1.0.0.tar.gz#md5=b3fc52b1ab2c48b825bcc463003d95f9 (from https://pypi.python.org/simple/ldtp/), version: 1.0.0
    Skipping link http://download.freedesktop.org/ldtp/0.x/0.9.x/ldtp-0.9.2.tar.gz (from https://pypi.python.org/simple/ldtp/); it is externally hosted
    Skipping link http://download.freedesktop.org/ldtp/1.x/1.0.x/ldtp-1.0.0.tar.gz (from https://pypi.python.org/simple/ldtp/); it is externally hosted
    Skipping link http://download.freedesktop.org/ldtp/1.x/1.1.x/ldtp-1.1.0.tar.gz (from https://pypi.python.org/simple/ldtp/); it is externally hosted
    Skipping link http://download.freedesktop.org/ldtp/3.x/3.0.x/ldtp-3.0.0.tar.gz (from https://pypi.python.org/simple/ldtp/); it is externally hosted
    Skipping link http://download.freedesktop.org/ldtp/3.x/3.5.x/ldtp-3.5.0.tar.gz (from https://pypi.python.org/simple/ldtp/); it is externally hosted
    Skipping link http://ldtp.freedesktop.org (from https://pypi.python.org/simple/ldtp/); not a file
  Using cached ldtp-1.0.0.tar.gz
  Downloading from URL https://pypi.python.org/packages/source/l/ldtp/ldtp-1.0.0.tar.gz#md5=b3fc52b1ab2c48b825bcc463003d95f9 (from https://pypi.python.org/simple/ldtp/)
  Running setup.py (path:/tmp/pip-build-6j6vgvsb/ldtp/setup.py) egg_info for package ldtp
    Running command python setup.py egg_info
    Traceback (most recent call last):
      File "<string>", line 18, in <module>
      File "/usr/lib/python3.4/tokenize.py", line 438, in open
        buffer = _builtin_open(filename, 'rb')
    FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pip-build-6j6vgvsb/ldtp/setup.py'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 18, in <module>
      File "/usr/lib/python3.4/tokenize.py", line 438, in open
        buffer = _builtin_open(filename, 'rb')
    FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pip-build-6j6vgvsb/ldtp/setup.py'
    
    ----------------------------------------
Cleaning up...
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-6j6vgvsb/ldtp
Exception information:
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/basecommand.py", line 211, in main
    status = self.run(options, args)
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/commands/install.py", line 305, in run
    wb.build(autobuilding=True)
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/wheel.py", line 705, in build
    self.requirement_set.prepare_files(self.finder)
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/req/req_set.py", line 334, in prepare_files
    functools.partial(self._prepare_file, finder))
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/req/req_set.py", line 321, in _walk_req_to_install
    more_reqs = handler(req_to_install)
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/req/req_set.py", line 505, in _prepare_file
    abstract_dist.prep_for_dist()
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/req/req_set.py", line 123, in prep_for_dist
    self.req_to_install.run_egg_info()
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/req/req_install.py", line 410, in run_egg_info
    command_desc='python setup.py egg_info')
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/utils/__init__.py", line 733, in call_subprocess
    % (command_desc, proc.returncode, cwd))
pip.exceptions.InstallationError: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-6j6vgvsb/ldtp

# pip install ./ldtp
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/basecommand.py", line 211, in main
    status = self.run(options, args)
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/commands/install.py", line 282, in run
    wheel_cache
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/basecommand.py", line 272, in populate_requirement_set
    wheel_cache=wheel_cache
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/req/req_install.py", line 213, in from_line
    wheel_cache=wheel_cache, constraint=constraint)
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/req/req_install.py", line 67, in __init__
    req = pkg_resources.Requirement.parse(req)
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/_vendor/pkg_resources/__init__.py", line 2980, in parse
    reqs = list(parse_requirements(s))
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/_vendor/pkg_resources/__init__.py", line 2924, in parse_requirements
    "version spec")
  File "/usr/local/lib/python3.4/dist-packages/pip-7.1.2-py3.4.egg/pip/_vendor/pkg_resources/__init__.py", line 2889, in scan_list
    raise RequirementParseError(msg, line, "at", line[p:])
pip._vendor.pkg_resources.RequirementParseError: Expected version spec in ./ldtp at /ldtp
root@bivdesk04:~# python --version
Python 2.7.9
root@bivdesk04:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 15.04
Release:        15.04
Codename:       vivid