def test_bad_arguments(self):
with self.assertRaises(TypeError):
calculate_abs_humidity(pressure='a',
temperature=25,
rel_humidity=110)
with self.assertRaises(TypeError):
calculate_abs_humidity(pressure=975,
temperature='a',
rel_humidity=110)
with self.assertRaises(TypeError):
calculate_abs_humidity(pressure=975,
temperature=25,
rel_humidity='a')
def test(self):
test_pressure = [100, 800, 850, 900, 950, 1000, 1050, 1100]
test_temp = [-10, 0, 10, 15, 20, 25, 40, 60]
test_rel = [80, 10, 20, 90, 40, 50, 43.25, 12.34]
correct_values = [0.0018930155819513275,
0.00048681001461818693,
0.0018843546921809028,
0.011566932891098143,
0.006927846890531939,
0.011536889704637605,
0.022155411985739303,
0.01612715205125449]
for i_test, correct_value in enumerate(correct_values):
result = calculate_abs_humidity(pressure=test_pressure[i_test],
temperature=test_temp[i_test],
rel_humidity=test_rel[i_test])
self.assertLess(abs(result - correct_value), 1e-6)
def get_humidity(self, relative=True):
"""Get a humidity reading.
Fetches a humidity reading from the sensor. The value can be the
relative humidity (`relative=True`), with values between 0 and 100.
Alternatively, it returns the absolute humidity in kg / m^3.
Args:
relative (bool): indicate relative (instead of absolute) humidity
Returns:
float: the current relative/absolute humidity
"""
data = self.get_data()
if relative:
return data['humidity']
return calculate_abs_humidity(pressure=data['pressure'],
temperature=data['temperature'],
rel_humidity=data['humidity'])
def print_data(self, temp_unit='C', relative_humidity=True,
pressure_unit='hPa', n_significant_digits=4):
"""Print sensor data.
Prints the temperature, humidity, and pressure in a easy readable
format. The user can specify the temperature unit (e.g. "C") via
`temp_unit`, the pressure unit (e.g. "hPa") via `pressure_unit`,
and whether to use absolute or relative humidity via
`relative_humidity`.
Args:
temp_unit (str): the unit the temperature should be in (C/F/K)
relative_humidity (bool): relative instead of absolute humidity
pressure_unit (str): pressure unit (Pa/hPa/kPa/atm/mmHg)
n_significant_digits (int): number of significant digits for values
Returns:
None: values are printed, not returned.
"""
data = self.get_data()
temperature = convert_temperature(data['temperature'], temp_unit)
pressure = convert_pressure(data['pressure'], pressure_unit)
humidity = data['humidity']
humidity_unit = '%'
if not relative_humidity:
humidity = calculate_abs_humidity(pressure=data['pressure'],
temperature=data['temperature'],
rel_humidity=data['humidity'])
humidity_unit = "kg / m^3"
# round to n significant digits
temperature = round_to_n_significant_digits(temperature,
n_significant_digits)
humidity = round_to_n_significant_digits(humidity,
n_significant_digits)
pressure = round_to_n_significant_digits(pressure,
n_significant_digits)
print("Temperature: ", temperature, temp_unit)
print("Humidity: ", humidity, humidity_unit)
print("Pressure: ", pressure, pressure_unit)
def test_valid_range(self):
with self.assertRaises(ValueError):
# pressure too low
calculate_abs_humidity(pressure=0,
temperature=25,
rel_humidity=50)
with self.assertRaises(ValueError):
# pressure too high
calculate_abs_humidity(pressure=1111,
temperature=25,
rel_humidity=50)
with self.assertRaises(ValueError):
# rel humidity too low
calculate_abs_humidity(pressure=975,
temperature=25,
rel_humidity=-1)
with self.assertRaises(ValueError):
# rel humidity too high
calculate_abs_humidity(pressure=975,
temperature=25,
rel_humidity=110)
with self.assertRaises(ValueError):
# temp too low
calculate_abs_humidity(pressure=975,
temperature=-101,
rel_humidity=50)
with self.assertRaises(ValueError):
# temp too high
calculate_abs_humidity(pressure=975,
temperature=101,
rel_humidity=50)