def quantity_converter():
# Create an instance of the conversion interface and
# mock so we can check methods called
qc = munits.ConversionInterface()
def convert(value, unit, axis):
if hasattr(value, 'units'):
return value.to(unit).magnitude
elif np.iterable(value):
try:
return [v.to(unit).magnitude for v in value]
except AttributeError:
return [Quantity(v, axis.get_units()).to(unit).magnitude
for v in value]
else:
return Quantity(value, axis.get_units()).to(unit).magnitude
def default_units(value, axis):
if hasattr(value, 'units'):
return value.units
elif np.iterable(value):
for v in value:
if hasattr(v, 'units'):
return v.units
return None
qc.convert = MagicMock(side_effect=convert)
qc.axisinfo = MagicMock(side_effect=lambda u, a:
munits.AxisInfo(label=u, default_limits=(0, 100)))
qc.default_units = MagicMock(side_effect=default_units)
return qc
def test_numpy_facade():
# Basic class that wraps numpy array and has units
class Quantity(object):
def __init__(self, data, units):
self.magnitude = data
self.units = units
def to(self, new_units):
return Quantity(self.magnitude, new_units)
def __getattr__(self, attr):
return getattr(self.magnitude, attr)
def __getitem__(self, item):
return self.magnitude[item]
# Create an instance of the conversion interface and
# mock so we can check methods called
qc = munits.ConversionInterface()
def convert(value, unit, axis):
if hasattr(value, 'units'):
return value.to(unit)
else:
return Quantity(value, axis.get_units()).to(unit).magnitude
qc.convert = MagicMock(side_effect=convert)
qc.axisinfo = MagicMock(return_value=None)
qc.default_units = MagicMock(side_effect=lambda x, a: x.units)
# Register the class
munits.registry[Quantity] = qc
# Simple test
t = Quantity(np.linspace(0, 10), 'sec')
d = Quantity(30 * np.linspace(0, 10), 'm/s')
fig, ax = plt.subplots(1, 1)
l, = plt.plot(t, d)
ax.yaxis.set_units('inch')
assert qc.convert.called
assert qc.axisinfo.called
assert qc.default_units.called
def test_numpy_facade():
# Create an instance of the conversion interface and
# mock so we can check methods called
qc = munits.ConversionInterface()
def convert(value, unit, axis):
if hasattr(value, 'units'):
return value.to(unit).magnitude
elif iterable(value):
try:
return [v.to(unit).magnitude for v in value]
except AttributeError:
return [
Quantity(v, axis.get_units()).to(unit).magnitude
for v in value
]
else:
return Quantity(value, axis.get_units()).to(unit).magnitude
qc.convert = MagicMock(side_effect=convert)
qc.axisinfo = MagicMock(side_effect=lambda u, a: munits.AxisInfo(label=u))
qc.default_units = MagicMock(side_effect=lambda x, a: x.units)
# Register the class
munits.registry[Quantity] = qc
# Simple test
y = Quantity(np.linspace(0, 30), 'miles')
x = Quantity(np.linspace(0, 5), 'hours')
fig, ax = plt.subplots()
fig.subplots_adjust(left=0.15) # Make space for label
ax.plot(x, y, 'tab:blue')
ax.axhline(Quantity(26400, 'feet'), color='tab:red')
ax.axvline(Quantity(120, 'minutes'), color='tab:green')
ax.yaxis.set_units('inches')
ax.xaxis.set_units('seconds')
assert qc.convert.called
assert qc.axisinfo.called
assert qc.default_units.called
