"""Compatibility functions for numpy versions in lib

np_new_unique
-------------
Optionally provides the count of the number of occurrences of each
unique element.

Copied from Numpy source, under license:

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"""

from distutils.version import LooseVersion

import numpy as np

NP_LT_114 = LooseVersion(np.__version__) < LooseVersion("1.14")

np_matrix_rank = np.linalg.matrix_rank
np_new_unique = np.unique


def lstsq(a, b, rcond=None):
    """
    Shim that allows modern rcond setting with backward compat for NumPY
    earlier than 1.14
    """
    if NP_LT_114 and rcond is None:
        rcond = -1
    return np.linalg.lstsq(a, b, rcond=rcond)
