invapid invapid - 1 year ago 482
Linux Question

pip install pickle not working - no such file or directory

Ubuntu 16.04 LTS, trying to install cpickle with pip. I've searched a bit, haven't found anything useful yet.

PYTHONPATH isn't set.

Error message



[email protected]:~$ 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
[email protected]:~$ python --version
Python 2.7.12
[email protected]:~$ 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 Source

Checking on the interweb, I found this

enter image description here

A common pattern in Python 2.x is to have one version of a module implemented in pure Python, with an optional accelerated version implemented as a C extension; for example, pickle and cPickle.

This places the burden of importing the accelerated version and falling back on the pure Python version on each user of these modules. In Python 3.0, the accelerated versions are considered implementation details of the pure Python versions.

Users should always import the standard version, which attempts to import the accelerated version and falls back to the pure Python version. The pickle / cPickle pair received this treatment. The profile module is on the list for 3.1. The StringIO module has been turned into a class in the io module.

Which means in Python3 it comes as a library ...

import _pickle as cPickle
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