Python | Notes/Classes

This is just something I might print when I get the chance.. ok
#Replacing Text. (REGEX)

import re #Defining the 're' module

def main(): #Defining a function 'main' - (can be anything)
    
    try: #Trying function below, if it is true, it will execute.
        
        v = input('What file would you like to run:  ')
        
        a = input('What text would you like to highlight:  ')
        
        b = input('What would you like to change it to:  ')
        
        fh = open (v) #Assigning the variable 'fh' to opening a file 'rotf.txt'
        
        pattern = re.compile(a, re.IGNORECASE) #Assigning 'pattern' to a function, which chooses the text and ignores case.

        for line in fh: #Printing a chosen object in a way defined below.

            if re.search(pattern, line): #If it finds 'pattern' excute code below it.

                print(pattern.sub(b, line), end='') #Prints the sentece containing 'pattern' and swaps chosen word with 'pattern.sub'

    except IOError as e: #If file is not found, print text below and type of error.

        print('Sorry, file not found!', e)
        
#main() #Calling the 'main' function written above.

#________________________________________________________________________________________________#

#Checking file name, and if it exists. (RECURSION)
        
def open_file(): #Defining the 're' module
    
    try: #If code below is true, try will excute
        
        file = input('What file would you like to open:  ') #Assigning file to user's choice
        
        for line in readlines(file): print(line.strip()) #Printing the file
        
    except IOError as e: #If no such file, print this error
        
        print('sorry file not found!', e) #What will execute if 'file' is False
        
    except ValueError as e: #If bad file name. e.g. '.dic' when it's '.doc'
        
        print('bad filename!', e) #What will execute if bad file name
        
def readlines(filename): #A function that will let the user choose a file
    
    if filename.endswith('.txt'): #Making sure the filename ends with '.txt'
        
        fh = open(filename) #Assigning 'fh' to what the users file choice is
        
        return fh.readlines() #Returning the file, with the readlines function
    
    else: raise ValueError('File name must end in .txt!') #If bad file name, this executes
    
#open_file() #Calling the function above.

#________________________________________________________________________________________________#


#Classes

class Animal:
    def talk(self): print('i have something to say') #Default function for 'talk'
    def walk(self): print('hey, im walking here') #Default function for 'walk'
    def clothes(self): print('i have nice clothes') #Default function for 'clothes'

class Dog(Animal): #Calling a class named 'Dog' and telling it it's an animal
    def bark(self): #Default result for 'bark'
        print('woof!')
    def walk(self): #Default resault for 'walk' (in Dog() only!)
        super().walk() #Tells the function to use the Default result for walk
        print('strut!')

class Duck(Animal): #Calling a class names dog and assigning it to 'Animal'
    def clothes(self): #Defining it's 'clothes'
        print('I have brown and white fur')
        
        
def Main():
    Max = Dog() #Assigning 'Max' to Dog() which can be used later on.
    Max.bark() #Max's bark
    Max.walk() #Max's walk
    Max.clothes() #Max's clothes
    
    donald = Duck() #Assigning 'donald' to Duck()
    donald.walk() #donald's walk
    donald.talk() #donald's talk
    donald.clothes() #donald's clothes


    
#Main() #Calling the Main() function

#________________________________________________________________________________________________#

#Classes

class Duck(): #Introduces the definition of a class.
    def __init__(self, **kwargs): #This is a constructor
        self.variables = kwargs
        
    def quack(self): #Function that prints a line of text.
        print('Quaaack!')
        
    def walk(self): #Function that prints a line of text.
        print('Walks like a duck.')

    def set_color(self, color): #Function that sets the color
        self.variables['color'] = color

    def get_color(self): #Function that gets the color
        return self.variables.get('color', None)

    def set_variable(self, k, v): #K and V represent the var and it's value
        self.variables[k] = v

    def get_variable(self, k): #Function that returns what is written
        return self.variables.get(k, None)
    
def duck():
    donald = Duck(feet = 2) #Setting the VAR 'feet' to '2' 
    donald.set_variable('color', 'blue') #Setting the VAR 'color' to 'blue'
    print(donald.get_variable('feet')) #Printing 'feet'
    print(donald.get_variable('color')) #Printing 'color'
#duck()

#________________________________________________________________________________________________#

#Classes

class Duck:
    def quack(self):
        print('Quaaack!')

    def walk(self):
        print('Walks like a duck!')

    def bark(self):
        print('the duck can not bark!')

    def fur(self):
        print('the duck has feathers!')

class Dog:
    def bark(self):
        print('woof')

    def fur(self):
        print('The dog has brown and black fur!')

    def walk(self):
        print('Walks like a dog!')

    def quack(self):
        print('The dog barks')

def animal():
    donald = Duck()
    fido = Dog()
    in_the_forest(donald)
    in_the_pond(fido)    
    
def in_the_forest(dog):
    dog.bark()
    dog.fur()

def in_the_pond(duck):
    duck.quack()
    duck.walk()

#animal()

#________________________________________________________________________________________________#

#Classes(generator)

class inc_range:
    def __init__(self, *args):
        numargs = len(args)
        if numargs < 1: raise TypeError('requires at least one arg')
        elif numargs == 1:
            self.stop = args[0]
            self.start = 0
            self.step = 1
        elif numargs == 2:
            (self.start, self.stop) = args
            self.step = 1
        elif numargs == 3:
            (self.start, self.stop, self.step) = args
        else: raise TypeError('expected at most 3 arguments, got {}'.format(numargs))
    def __iter__(self):
        i = self.start
        while i <= self.stop:
            yield i
            i += self.step

def main():
    o = inc_range(0, 30000)
    for i in o: print(i, end = ' ')

#main()
    


#________________________________________________________________________________________________#

#Decorators

class Duck:
    def __init__(self, **kwargs):
        self.properties = kwargs

    def quack(self):
        print('Quaaack!')

    def walk(self):
        print('Walks like a duck.')

    def get_properties(self):
        return self.properties

    def get_property(self, key):
        return self.properties.get(key, None)

    @property
    def color(self):
        self.properties.get('color', None)

    @color.setter
    def color(self, c):
        self.properties['color'] = c

    @color.deleter
    def color(self):
        del self.properties['color']
        
def main():
    donald = Duck()
    donald.color = 'blue'
    print(donald.color)

if __name__ == "__main__": main()

#main()

#________________________________________________________________________________________________#