person-re-ranking/caffe/scripts/travis/setup-venv.sh

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#!/bin/bash
# setup a Python virtualenv
# (must come after install-deps)
BASEDIR=$(dirname $0)
source $BASEDIR/defaults.sh
VENV_DIR=${1:-~/venv}
# setup our own virtualenv
if $WITH_PYTHON3; then
PYTHON_EXE='/usr/bin/python3'
else
PYTHON_EXE='/usr/bin/python2'
fi
# use --system-site-packages so that Python will use deb packages
virtualenv $VENV_DIR -p $PYTHON_EXE --system-site-packages