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""" Test fast_dict.
"""
import numpy as np
from nose.tools import assert_equal
from sklearn.utils.fast_dict import IntFloatDict, argmin
from sklearn.externals.six.moves import xrange
def test_int_float_dict():
rng = np.random.RandomState(0)
keys = np.unique(rng.randint(100, size=10).astype(np.intp))
values = rng.rand(len(keys))
d = IntFloatDict(keys, values)
for key, value in zip(keys, values):
assert_equal(d[key], value)
assert_equal(len(d), len(keys))
d.append(120, 3.)
assert_equal(d[120], 3.0)
assert_equal(len(d), len(keys) + 1)
for i in xrange(2000):
d.append(i + 1000, 4.0)
assert_equal(d[1100], 4.0)
def test_int_float_dict_argmin():
# Test the argmin implementation on the IntFloatDict
keys = np.arange(100, dtype=np.intp)
values = np.arange(100, dtype=np.float64)
d = IntFloatDict(keys, values)
assert_equal(argmin(d), (0, 0))
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