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__init__.py
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__init__.py
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import warnings
from contextlib import contextmanager
from distutils import version
import re
import importlib
from unittest import mock
import numpy as np
from numpy.testing import assert_array_equal # noqa: F401
from xarray.core.duck_array_ops import allclose_or_equiv # noqa
import pytest
from xarray.core import utils
from xarray.core.options import set_options
from xarray.core.indexing import ExplicitlyIndexed
from xarray.testing import (assert_equal, assert_identical, # noqa: F401
assert_allclose, assert_combined_tile_ids_equal)
from xarray.plot.utils import import_seaborn
try:
from pandas.testing import assert_frame_equal
except ImportError:
# old location, for pandas < 0.20
from pandas.util.testing import assert_frame_equal # noqa: F401
# import mpl and change the backend before other mpl imports
try:
import matplotlib as mpl
# Order of imports is important here.
# Using a different backend makes Travis CI work
mpl.use('Agg')
except ImportError:
pass
def _importorskip(modname, minversion=None):
try:
mod = importlib.import_module(modname)
has = True
if minversion is not None:
if LooseVersion(mod.__version__) < LooseVersion(minversion):
raise ImportError('Minimum version not satisfied')
except ImportError:
has = False
func = pytest.mark.skipif(not has, reason='requires {}'.format(modname))
return has, func
def LooseVersion(vstring):
# Our development version is something like '0.10.9+aac7bfc'
# This function just ignored the git commit id.
vstring = vstring.split('+')[0]
return version.LooseVersion(vstring)
has_matplotlib, requires_matplotlib = _importorskip('matplotlib')
has_matplotlib2, requires_matplotlib2 = _importorskip('matplotlib',
minversion='2')
has_scipy, requires_scipy = _importorskip('scipy')
has_pydap, requires_pydap = _importorskip('pydap.client')
has_netCDF4, requires_netCDF4 = _importorskip('netCDF4')
has_h5netcdf, requires_h5netcdf = _importorskip('h5netcdf')
has_pynio, requires_pynio = _importorskip('Nio')
has_pseudonetcdf, requires_pseudonetcdf = _importorskip('PseudoNetCDF')
has_cftime, requires_cftime = _importorskip('cftime')
has_cftime_1_0_2_1, requires_cftime_1_0_2_1 = _importorskip(
'cftime', minversion='1.0.2.1')
has_dask, requires_dask = _importorskip('dask')
has_bottleneck, requires_bottleneck = _importorskip('bottleneck')
has_rasterio, requires_rasterio = _importorskip('rasterio')
has_pathlib, requires_pathlib = _importorskip('pathlib')
has_zarr, requires_zarr = _importorskip('zarr', minversion='2.2')
has_np113, requires_np113 = _importorskip('numpy', minversion='1.13.0')
has_iris, requires_iris = _importorskip('iris')
has_cfgrib, requires_cfgrib = _importorskip('cfgrib')
# some special cases
has_scipy_or_netCDF4 = has_scipy or has_netCDF4
requires_scipy_or_netCDF4 = pytest.mark.skipif(
not has_scipy_or_netCDF4, reason='requires scipy or netCDF4')
has_cftime_or_netCDF4 = has_cftime or has_netCDF4
requires_cftime_or_netCDF4 = pytest.mark.skipif(
not has_cftime_or_netCDF4, reason='requires cftime or netCDF4')
if not has_pathlib:
has_pathlib, requires_pathlib = _importorskip('pathlib2')
try:
import_seaborn()
has_seaborn = True
except ImportError:
has_seaborn = False
requires_seaborn = pytest.mark.skipif(not has_seaborn,
reason='requires seaborn')
# change some global options for tests
set_options(warn_for_unclosed_files=True)
if has_dask:
import dask
if LooseVersion(dask.__version__) < '0.18':
dask.set_options(get=dask.get)
else:
dask.config.set(scheduler='single-threaded')
# pytest config
try:
_SKIP_FLAKY = not pytest.config.getoption("--run-flaky")
_SKIP_NETWORK_TESTS = not pytest.config.getoption("--run-network-tests")
except (ValueError, AttributeError):
# Can't get config from pytest, e.g., because xarray is installed instead
# of being run from a development version (and hence conftests.py is not
# available). Don't run flaky tests.
_SKIP_FLAKY = True
_SKIP_NETWORK_TESTS = True
flaky = pytest.mark.skipif(
_SKIP_FLAKY, reason="set --run-flaky option to run flaky tests")
network = pytest.mark.skipif(
_SKIP_NETWORK_TESTS,
reason="set --run-network-tests option to run tests requiring an "
"internet connection")
@contextmanager
def raises_regex(error, pattern):
__tracebackhide__ = True # noqa: F841
with pytest.raises(error) as excinfo:
yield
message = str(excinfo.value)
if not re.search(pattern, message):
raise AssertionError('exception %r did not match pattern %r'
% (excinfo.value, pattern))
class UnexpectedDataAccess(Exception):
pass
class InaccessibleArray(utils.NDArrayMixin, ExplicitlyIndexed):
def __init__(self, array):
self.array = array
def __getitem__(self, key):
raise UnexpectedDataAccess("Tried accessing data")
class ReturnItem(object):
def __getitem__(self, key):
return key
class IndexerMaker(object):
def __init__(self, indexer_cls):
self._indexer_cls = indexer_cls
def __getitem__(self, key):
if not isinstance(key, tuple):
key = (key,)
return self._indexer_cls(key)
def source_ndarray(array):
"""Given an ndarray, return the base object which holds its memory, or the
object itself.
"""
with warnings.catch_warnings():
warnings.filterwarnings('ignore', 'DatetimeIndex.base')
warnings.filterwarnings('ignore', 'TimedeltaIndex.base')
base = getattr(array, 'base', np.asarray(array).base)
if base is None:
base = array
return base