def test_roundtrip(self):
ds = create_ensemble_data()
for vn in utils.available_variables(ds):
v = utils.get_variable(vn)
orig = ds.copy(deep=True)
expected = v.decompress(v.compress(ds), ds)
# make sure two passes yields the same result
actual = v.decompress(v.compress(expected), ds)
actual.identical(expected)
def infer_variable(fcst):
"""
This attempts to infer which variable is held in a particular forecast.
It assumes there is a single variable.
"""
variable = utils.available_variables(fcst)
variable = set(variable).symmetric_difference(fcst.coords.keys())
if len(variable) > 1:
raise ValueError("More than one possible variable (%s) "
"please specify which you'd like to plot"
% (', '.join([v.variable_name
for v in variable])))
return variable.pop()
