#!/bin/bash -u
  
  # Copyright 2015 (c) Johns Hopkins University (Jan Trmal <jtrmal@gmail.com>)
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #  http://www.apache.org/licenses/LICENSE-2.0
  #
  # THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
  # WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
  # MERCHANTABLITY OR NON-INFRINGEMENT.
  # See the Apache 2 License for the specific language governing permissions and
  # limitations under the License.
  
  [ -f ./path.sh ] && . ./path.sh
  set +e
  
  command -v python3 >&/dev/null \
    || { echo  >&2 "python3 not found on PATH. You will have to install Python3, preferably >= 3.6"; exit 1; }
  
  python3 -c "import numpy"
  if [ $? -ne 0 ] ; then
    echo >&2 "This recipe needs numpy installed."
    exit 1
  fi
  
  python3 -c "import scipy"
  if [ $? -ne 0 ] ; then
    echo >&2 "This recipe needs scipy installed."
    exit 1
  fi
  
  python3 -c "import scipy.misc; scipy.misc.__dict__['imread']"
  if [ $? -ne 0 ] ; then
    echo >&2 "This recipe needs scipy-image and  Pillow installed."
    exit 1
  fi
  
  
  exit  0