PyTempConvDIP, Python 3

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#python 3.6.9

#PyTempConvDIP: example of SOLID principle where Dependency Inversion Principle is highlighted;high level module depends on abstraction ,not on low level module;
#this code is created by Rezaul Hoque on April 16,2022.
#contact:jewelmrh@yahoo.com;Dhaka,Bangladesh;https://rezaulhoque.wordpress.com,https://hoquestake.blogspot.com
#note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;
from abc import ABC

class TempChange(ABC):
    def change(self, from_scale, to_scale, temp) -> float:
        pass

class Cel2Far(TempChange):
    def change(self, from_scale, to_scale, temp) -> float:
        print('Converting temperature from Celsius to Fahrenheit with Cel2Far:')
        print(f'{temp} {from_scale} = {9*temp/5+32} {to_scale}')
        return  9*temp/5+32
 
class Far2Cel(TempChange):
    def change(self, from_scale, to_scale, temp) -> float:
        print('Converting temperature from Fahrenheit to Celsius with Far2Cel:')
        print(f'{temp} {from_scale} = {5*(temp-32)/9} {to_scale}')
        return 5*(temp-32)/9

class Cel2Kel(TempChange):
    def change(self, from_scale, to_scale, temp) -> float:
        print('Converting temperature from Celsius to Kelvin with Cel2Kel:')
        print(f'{temp} {from_scale} = {temp+273.15} {to_scale}')
        return temp+273.15

class Kel2Cel(TempChange):
    def change(self, from_scale, to_scale, temp) -> float:
        print('Converting temperature from Kelvin to Celsius with Kel2Cel:')
        print(f'{temp} {from_scale} = {temp-273.15} {to_scale}')
        return temp-273.15

class Far2Kel(TempChange):
    def change(self, from_scale, to_scale, temp) -> float:
        print('Converting temperature from Fahrenheit to Kelvin with Far2Kel:')
        print(f'{temp} {from_scale} = {5*(temp+459.67)/9} {to_scale}')
        return 5*(temp+459.67)/9

class Kel2Far(TempChange):
    def change(self, from_scale, to_scale, temp) -> float:
        print('Converting temperature from Kelvin to Fahrenheit with Kel2Far:')
        print(f'{temp} {from_scale} = {9*temp/5-459.67} {to_scale}')
        return  9*temp/5-459.67
class HighMod:
    def __init__(self, changer: TempChange):
        self.changer = changer

def disp(self):
        self.changer.change('°C', '°F', 30)

if __name__ == '__main__':
    changer = Cel2Far()
    a = HighMod(changer)
    a.disp()

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Absolute running time: 0.19 sec, cpu time: 0.05 sec, memory peak: 8 Mb, absolute service time: 0,35 sec