How to install pip for python3.4 when my pi have python3.2 and python3.4

Python 3.4 has pip included, see What's New in Python 3.4.

Just execute:

python3.4 -m ensurepip

to install it if it is missing for you. See the ensurepip module documentation for further details.

You can go to your python 3.4 directory scripts and run it's pip in:

../python3.4/scripts

You should compile python 3.4 and use venv for python3 environment:

1. Check if you have installed required dependencies:

   sudo apt-get install build-essential
   
   sudo apt-get install libc6-dev libreadline-dev libz-dev libncursesw5-dev libssl-dev libgdbm-dev libsqlite3-dev libbz2-dev liblzma-dev tk-dev
   

2. Download and compile Python 3.4.3. You should not sudo make install it because we don't need it systemwide:

   wget https://www.python.org/ftp/python/3.4.3/Python-3.4.3.tgz
   tar -xvf Python-3.4.3.tgz
   cd Python-3.4.3 
   ./configure && make
   

   This may take a while on pi.

3. While you still in current folder, create python environment:

   mkdir -p ~/.virtualenvs
   ./python -m venv ~/.virtualenvs/py34
   

4. launch your virtual environment:

   source ~/.virtualenvs/py34/bin/activate
   

Now you have Python 3.4 and pip inside of it. Try:

    pip install bpython

To exit virtual environment use:

    deactivate