安装 pip Python

Question

Please, why i have pip 1.5.4 in the (venv)? how can i upgrade pip to 8.1.2 in the venv? Thanks

 root@graphene-95:~# pip -V
 pip 8.1.2 from /usr/local/lib/python2.7/dist-packages/pip-8.1.2-py2.7.egg
 (python 2.7)
 root@graphene-95:~# pip3 -V
  The program 'pip3' is currently not installed. You can install it by     
 typing:
 apt-get install python3-pip
 root@graphene-95:~# source ~/tensorflow/venv/bin/activate
 (venv)root@graphene-95:~# pip -V
 pip 1.5.4 from /root/tensorflow/venv/local/lib/python2.7/site-packages
 (python 2.7)
 (venv)root@graphene-95:~# pip3 -v
 The program 'pip3' is currently not installed. You can install it by   
 typing:

 apt-get install python3-pip

Answer 1

In order to install a specific version of pip, use the command pip install pip==8.2.1 after activating your virtual environment.

And, if you get SSL error like this

Could not fetch URL https://pypi.python.org/simple/pip/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) - skipping .

Then, first you to have get the latest pip, then only you can install a particular version of pip.So, to get latest pip, execute this command

curl https://bootstrap.pypa.io/get-pip.py | python curl https://bootstrap.pypa.io/get-pip.py | python .

Now try this pip install pip==8.2.1

Answer 2

i solved with the following command, and it worked for me: sudo su root sudo su root apt-get purge -y python-pip wget https://bootstrap.pypa.io/get-pip.py python./get-pip.py apt-get install python-pip