Python Examples
Dave Braunschweig
Objects
# This class converts temperature between Celsius and Fahrenheit. # It may be used by assigning a value to either Celsius or Fahrenheit # and then retrieving the other value, or by calling the to_celsius or # to_fahrenheit methods directly. # # References: # https://www.mathsisfun.com/temperature-conversion.html # https://en.wikibooks.org/wiki/Python_Programming class Temperature: _celsius = None _fahrenheit = None @property def celsius(self): return self._celsius @celsius.setter def celsius(self, value): self._celsius = float(value) self._fahrenheit = self.to_fahrenheit(self._celsius) @property def fahrenheit(self): return self._fahrenheit @fahrenheit.setter def fahrenheit(self, value): self._fahrenheit = float(value) self._celsius = self.to_celsius(self._fahrenheit) def __init__(self, celsius=None, fahrenheit=None): if celsius != None: self._celsius = celsius self._fahrenheit = self.to_fahrenheit(celsius) if fahrenheit != None: self._fahrenheit = fahrenheit self._celsius = self.to_celsius(fahrenheit) def to_celsius(self, fahrenheit): return (fahrenheit - 32) * 5 / 9 def to_fahrenheit(self, celsius): return celsius * 9 / 5 + 32 # This program creates instances of the Temperature class to convert Cesius # and Fahrenheit temperatures. def main(): temp1 = Temperature(celsius=0) print("temp1.celsius =", temp1.celsius) print("temp1.fahrenheit =", temp1.fahrenheit) print("") temp1.celsius = 100 print("temp1.celsius =", temp1.celsius) print("temp1.fahrenheit =", temp1.fahrenheit) print("") temp2 = Temperature(fahrenheit=0) print("temp2.fahrenheit =", temp2.fahrenheit) print("temp2.celsius =", temp2.celsius) print("") temp2.fahrenheit = 100 print("temp2.fahrenheit =", temp2.fahrenheit) print("temp2.celsius =", temp2.celsius) main()
Output
temp1.celsius = 0 temp1.fahrenheit = 32.0 temp1.celsius = 100.0 temp1.fahrenheit = 212.0 temp2.fahrenheit = 0 temp2.celsius = -17.77777777777778 temp2.fahrenheit = 100.0 temp2.celsius = 37.77777777777778