Revisión de 12:21 9 nov 2018

The generation of environments facilitate the specific requiremnts of each user for each purpose.

Following instructions from python environments

1. Creation of the place where the environment will reside

$ mkdir -p ${HOME}/bin/py27env
$ cd ${HOME}/bin/py27env

1. Install virtualenv

$ pip install virtualenv

1. Test installation

$ virtualenv --version

1. Create a virtual environment (e.g `py27env' to be used with python 2.7):

$ virtualenv -p /usr/bin/python2.7 ./

1. Activate the environment

$ source ${HOME}/bin/py27env/bin/activate
(py27env) $

1. Installing packages

(py27env) $ pip install numpy
Collecting numpy
  Using cached numpy-1.13.3-cp27-cp27mu-manylinux1_x86_64.whl
Installing collected packages: numpy
Successfully installed numpy-1.13.3

1. To know which packages are installed

(py27env) $ pip freeze
numpy==1.13.3

1. With the activation of the environment, one directly uses the python from it

(py27env) $ which python
/home/lluis.fita/bin/py27env/bin/python

1. Deactivating environment

(py27env) $ deactivate
$ 

Matplotlib

There are certain installation problems referred to the `mpl_toolkit'

1. On a given instaltion:

(py27env) $ pip freeze
backports.functools-lru-cache==1.4
cycler==0.10.0
ecmwf-api-client==1.5.0
matplotlib==2.1.0
netCDF4==1.3.1
numpy==1.13.3
pyparsing==2.2.0
python-dateutil==2.6.1
pytz==2017.3
scipy==1.0.0
six==1.11.0
subprocess32==3.2.7

• There is not `basemap'

from mpl_toolkits.basemap import Basemap
ImportError: No module named basemap

• but it is not found in the pip

(py27env) $ pip install basemap
Collecting basemap
  Could not find a version that satisfies the requirement basemap (from versions: )
No matching distribution found for basemap

• Installing directly from matpotlib

(py27env) $ pip install https://github.com/matplotlib/basemap/archive/v1.1.0.tar.gz

• Or we will need to manually install `matplotlib' and `basemap' (following Matplolib installation. Unpacking the different packages...

(py27env) $ mkdir $HOME/Downloads
(py27env) $ cd Downloads/