
# external imports

try:
    import numpy as np
    import numpy.linalg as la
except:
    print('numpy 1.3 is required')
    raise
try:
    import scipy as sp
    import scipy.stats as stats
    from .cg.kdtree import KDTree
    from scipy.spatial.distance import pdist, cdist
except:
    print('scipy 0.7+ is required')
    raise

RTOL = .00001

import copy
import math
import random
import sys
import time
import unittest
