有2个Python版本时如何使用pip安装软件包

Question

I have 2 anaconda in my system: one with python 2.7 & and another with python 3.5 .

My command prompt is showing python version as 2.7 .

I need to install one package for Python 3.5 using pip only,not conda install. I installed it using pip. It's showing installed successfully, but I'm not able to import it in Anaconda with Python 3.5 .

My python 2.7 path is given in path environmental variable. Can you suggest me how to install it using pip install for python 3.5 ?
I don't have python 3 installed in my system. I think I have anaconda 3.5 environment in my system. Please refer the screen shot. Also I can't able to install python 3.5 in my system

Answer 1

To install a package in specific version, try this:

A specific version of python:

$ python-3.5 -m pip install <pkg-name>

Answer 2

Assuming you mean that you have two conda environments, go to a Anaconda command prompt and activate the Python 3.5 environment. Then, if pip is not installed, do:

conda install pip

Then, you should be able to run

pip install <package>

to install in to Python 3.5 provided that you are in the Python 3.5 environment.

If you don't have a Python 3.5 environment yet, simply do

conda create --name py35 python=3.5

followed by

activate py35          (Windows)
source activate py35   (Linux or macOS)

Answer 3

You can use:

pip install --install-option="--prefix=$PATH_PREFIX" <package_name>

or

pip install -t <direct directory> <package_name>