unable to install python module

Question

Unable to install Python module on Ubuntu machine. When I try to install the Paramiko module, I receive the following error:

Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py",  line 70, in <module>
    import packaging.version
ImportError: No module named packaging.version

Answer 1

Finally I found a solution, it worked after cleaning up and re-installing pip:

sudo -i
apt-get purge -y python-pip
wget https://bootstrap.pypa.io/get-pip.py
python ./get-pip.py
apt-get install python-pip

Answer 2

Run

pip install packaging 

Add sudo if it is nessesary. It must resolve the issue.

Answer 3

你的pip安装可能有问题尝试：

sudo pip install --upgrade pip