Pip install pickle does not work - there is no such file or directory

Question

Ubuntu 16.04 LTS trying to install cpickle with pip. I searched a bit until I found nothing useful.

PYTHONPATH is not installed.

Error message

user@hostname:~$ sudo -H pip3 install cpickle
Collecting cpickle
  Using cached cpickle-0.5.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/usr/lib/python3.5/tokenize.py", line 454, in open
        buffer = _builtin_open(filename, 'rb')
    FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pip-build-wn926hef/cpickle/setup.py'

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-wn926hef/cpickle/
You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.


    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-q46tq1l8/cpickle/
You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

troubleshooting steps

# version info
user@hostname:~$ python --version
Python 2.7.12
user@hostname:~$ python3 --version
Python 3.5.2

# I don't think cache is the problem
rm -rf ~/.cache/
sudo -H pip install  cpickle --no-cache-dir # same problem
sudo -H pip3 install  cpickle --no-cache-dir # same problem

Answer 1

Check on interweb, I found this

The generic template in Python 2.x must have one module version, implemented in pure Python, with an optional accelerated version, implemented as an extension of C; e.g. pickle and cPickle.

Python . Python 3.0 Python.

, Python. pickle/cPickle . 3.1. StringIO io.

, Python3 ...

import _pickle as cPickle

Answer 2

cPickle Python; pip. Python 2 Python. Python 3 :

Python 2.x , Python, , C; , pickle cPickle. Python . Python 3.0 Python. , Python. pickle/cPickle .

cPickle pip Pythonista , , cPickle ( , ) setup.py, , "Package 'cpickle' must not be downloaded from pypi". , , - , , PyPI, - , , . , , , , .