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import cf
import numpy
import os
import unittest
class ExamplesTest(unittest.TestCase):
def test_example1(self):
f = cf.Field()
print_f = str(f)
self.assertTrue(
print_f ==
' field summary\n--------------\n\n')
#--- End: def
def test_example2(self):
f = cf.Field(properties={'standard_name': 'air_temperature',
'long_name': 'temperature of air'})
print_f = str(f)
self.assertTrue(
print_f ==
'air_temperature field summary\n-----------------------------\n\n')
#--- End: def
def test_example3(self):
data = cf.Data(numpy.arange(90.).reshape(10, 9), 'm s-1')
properties = {'standard_name': 'eastward_wind'}
dim0 = cf.DimensionCoordinate(data=cf.Data(range(10), 'degrees_north'),
properties={'standard_name': 'latitude'})
dim1 = cf.DimensionCoordinate(data=cf.Data(range(9), 'degrees_east'))
dim1.standard_name = 'longitude'
domain = cf.Domain(dim=[dim0, dim1])
f = cf.Field(properties=properties, data=data, domain=domain)
print_f = str(f)
self.assertTrue(
print_f ==
'''eastward_wind field summary
---------------------------
Data : eastward_wind(latitude(10), longitude(9)) m s-1
Axes : longitude(9) = [0, ..., 8] degrees_east
: latitude(10) = [0, ..., 9] degrees_north
''')
aux = cf.AuxiliaryCoordinate(data=cf.Data(['alpha','beta','gamma','delta','epsilon',
'zeta','eta','theta','iota','kappa']))
aux.long_name = 'extra'
f.insert_aux(aux, axes=['dim0'])
f.cell_methods = cf.CellMethods('latitude: point')
f.long_name = 'wind'
print_f = str(f)
self.assertTrue(
print_f == '''eastward_wind field summary
---------------------------
Data : eastward_wind(latitude(10), longitude(9)) m s-1
Cell methods : latitude: point
Axes : longitude(9) = [0, ..., 8] degrees_east
: latitude(10) = [0, ..., 9] degrees_north
Aux coords : long_name:extra(latitude(10)) = [alpha, ..., kappa]
''')
f.remove_item({'long_name': 'extra'})
del f.cell_methods
print_f = str(f)
self.assertTrue(
print_f == '''eastward_wind field summary
---------------------------
Data : eastward_wind(latitude(10), longitude(9)) m s-1
Axes : longitude(9) = [0, ..., 8] degrees_east
: latitude(10) = [0, ..., 9] degrees_north
''')
#--- End: def
def test_example4(self):
#---------------------------------------------------------------------
# 1. CREATE the field's domain items
#---------------------------------------------------------------------
# Create a grid_latitude dimension coordinate
Y = cf.DimensionCoordinate(properties={'standard_name': 'grid_latitude'},
data=cf.Data(numpy.arange(10.), 'degrees'))
# Create a grid_longitude dimension coordinate
X = cf.DimensionCoordinate(data=cf.Data(numpy.arange(9.), 'degrees'))
X.standard_name = 'grid_longitude'
# Create a time dimension coordinate (with bounds)
bounds = cf.CoordinateBounds(
data=cf.Data([0.5, 1.5], cf.Units('days since 2000-1-1', calendar='noleap')))
T = cf.DimensionCoordinate(properties=dict(standard_name='time'),
data=cf.Data(1, cf.Units('days since 2000-1-1',
calendar='noleap')),
bounds=bounds)
# Create a longitude auxiliary coordinate
lat = cf.AuxiliaryCoordinate(data=cf.Data(numpy.arange(90).reshape(10, 9),
'degrees_north'))
lat.standard_name = 'latitude'
# Create a latitude auxiliary coordinate
lon = cf.AuxiliaryCoordinate(properties=dict(standard_name='longitude'),
data=cf.Data(numpy.arange(1, 91).reshape(9, 10),
'degrees_east'))
# Create a rotated_latitude_longitude grid mapping coordinate reference
grid_mapping = cf.CoordinateReference('rotated_latitude_longitude',
grid_north_pole_latitude=38.0,
grid_north_pole_longitude=190.0)
# --------------------------------------------------------------------
# 2. Create the field's domain from the previously created items
# --------------------------------------------------------------------
domain = cf.Domain(dim=[T, Y, X],
aux=[lat, lon],
ref=grid_mapping)
#---------------------------------------------------------------------
# 3. Create the field
#---------------------------------------------------------------------
# Create CF properties
properties = {'standard_name': 'eastward_wind',
'long_name' : 'East Wind',
'cell_methods' : cf.CellMethods('latitude: point')}
# Create the field's data array
data = cf.Data(numpy.arange(90.).reshape(9, 10), 'm s-1')
# Finally, create the field
f = cf.Field(properties=properties,
domain=domain,
data=data)
print_f = str(f)
self.assertTrue(
print_f == '''eastward_wind field summary
---------------------------
Data : eastward_wind(grid_longitude(9), grid_latitude(10)) m s-1
Cell methods : latitude: point
Axes : time(1) = [2000-01-02 00:00:00] noleap
: grid_longitude(9) = [0.0, ..., 8.0] degrees
: grid_latitude(10) = [0.0, ..., 9.0] degrees
Aux coords : latitude(grid_latitude(10), grid_longitude(9)) = [[0, ..., 89]] degrees_north
: longitude(grid_longitude(9), grid_latitude(10)) = [[1, ..., 90]] degrees_east
Coord refs : <CF CoordinateReference: rotated_latitude_longitude>
''')
#--- End: def
def test_example5(self):
import cf
import numpy
#---------------------------------------------------------------------
# 1. CREATE the field's domain items
#---------------------------------------------------------------------
# Create a grid_latitude dimension coordinate
Y = cf.DimensionCoordinate(properties={'standard_name': 'grid_latitude'},
data=cf.Data(numpy.arange(10.), 'degrees'))
# Create a grid_longitude dimension coordinate
X = cf.DimensionCoordinate(data=cf.Data(numpy.arange(10.), 'degrees'))
X.standard_name = 'grid_longitude'
# Create a time dimension coordinate (with bounds)
bounds = cf.CoordinateBounds(
data=cf.Data([0.5, 1.5], cf.Units('days since 2000-1-1', calendar='noleap')))
T = cf.DimensionCoordinate(properties=dict(standard_name='time'),
data=cf.Data(1, cf.Units('days since 2000-1-1',
calendar='noleap')),
bounds=bounds)
# Create a longitude auxiliary coordinate
lat = cf.AuxiliaryCoordinate(data=cf.Data(numpy.arange(100).reshape(10, 10),
'degrees_north'))
lat.standard_name = 'latitude'
# Create a latitude auxiliary coordinate
lon = cf.AuxiliaryCoordinate(properties=dict(standard_name='longitude'),
data=cf.Data(numpy.arange(1, 101).reshape(10, 10),
'degrees_east'))
# Create a rotated_latitude_longitude grid mapping coordinate reference
grid_mapping = cf.CoordinateReference('rotated_latitude_longitude',
grid_north_pole_latitude=38.0,
grid_north_pole_longitude=190.0)
# --------------------------------------------------------------------
# 2. Create the field's domain from the previously created items
# --------------------------------------------------------------------
domain = cf.Domain(dim=[T, Y, X],
aux={'aux0': lat, 'aux1': lon},
ref=grid_mapping,
assign_axes={'aux0': ['grid_latitude', 'grid_longitude'],
'aux1': ['grid_longitude', 'grid_latitude']})
#---------------------------------------------------------------------
# 3. Create the field
#---------------------------------------------------------------------
# Create CF properties
properties = {'standard_name': 'eastward_wind',
'long_name' : 'East Wind',
'cell_methods' : cf.CellMethods('latitude: point')}
# Create the field's data array
data = cf.Data(numpy.arange(100.).reshape(10, 10), 'm s-1')
# Finally, create the field
f = cf.Field(properties=properties,
domain=domain,
data=data,
axes=['grid_latitude', 'grid_longitude'])
print_f = str(f)
self.assertTrue(
print_f == '''eastward_wind field summary
---------------------------
Data : eastward_wind(grid_latitude(10), grid_longitude(10)) m s-1
Cell methods : latitude: point
Axes : time(1) = [2000-01-02 00:00:00] noleap
: grid_longitude(10) = [0.0, ..., 9.0] degrees
: grid_latitude(10) = [0.0, ..., 9.0] degrees
Aux coords : latitude(grid_latitude(10), grid_longitude(10)) = [[0, ..., 99]] degrees_north
: longitude(grid_longitude(10), grid_latitude(10)) = [[1, ..., 100]] degrees_east
Coord refs : <CF CoordinateReference: rotated_latitude_longitude>
''')
#--- End: def
#--- End: class
if __name__ == '__main__':
print 'cf-python version:' , cf.__version__
print 'cf-python path:' , os.path.abspath(cf.__file__)
print ''
unittest.main(verbosity=2)
|
