dev-dull · June 5, 2019 23:59
diff --git a/selfie.py b/selfie.py
 ##
 ## selfie.py
 ## Quick illustration of the 'self' keyword
 ## Illustration of `if __name__ == '__main__'`
 ##

 ##
 ## Read through the below code and comments, then try the following commands
 ## python3 selfie.py  # see everything that is printed to screen
 ## python3  # see that the code outside the class and the __name__ if condition is run
 ## >>> from selfie import Selfie
 ## >>> exit()
 ## python3
 ## >>> import selfie
 ##

 class Selfie(object):
    def __init__(self, bar):
        self.bar = bar  # take our input and save it into self.bar which can be accessed by other fuctions.
        self.foobar = bar  # the variable name in the class doesn't need to match, though.
        baz = bar  # this is only visible in the __init__ funciton

    def print_bars(self):
        self.foobar += 1  # we can change it here and it will be changed throughout the whole class
        print(self.bar, self.foobar)  # we can access both of our 'bar' variables

    def print_foobar(self):
        print(self.foobar)  # just to see our change from print_bars()

    def print_baz(self):
        try:
            print(baz)  # whoops. baz doesn't appear to exist yet because it was defined to only exist in __init__
        except Exception as e:
            print('This prints out because the baz variable does not exist in this scope.')

        baz = self.bar
        print('Okay, now baz exists and is %s' % baz)
        # print('Okay, now bar exists and is {baz}')  # New python syntax. I haven't tried this new feature yet.

 if __name__ == '__main__':
    # these will only happen when we run `python3 selfie.py` from the command line.
    example = Selfie(11)  # create an instance of the object
    example.print_bars()
    example.print_foobar()
    example.print_baz()

 example2 = Selfie(0)
 example2.print_bars()  # This will happen every time: `from selfie import Selfie`, `import selfie` and on the command line when we `python3 selfie.py`
                       # I abuse this fact in some of my code, but you generally don't want any logic outside of a function or outside of a class.
	##
	## selfie.py
	## Quick illustration of the 'self' keyword
	## Illustration of `if __name__ == '__main__'`
	##

	##
	## Read through the below code and comments, then try the following commands
	## python3 selfie.py # see everything that is printed to screen
	## python3 # see that the code outside the class and the __name__ if condition is run
	## >>> from selfie import Selfie
	## >>> exit()
	## python3
	## >>> import selfie
	##

	class Selfie(object):
	def __init__(self, bar):
	self.bar = bar # take our input and save it into self.bar which can be accessed by other fuctions.
	self.foobar = bar # the variable name in the class doesn't need to match, though.
	baz = bar # this is only visible in the __init__ funciton

	def print_bars(self):
	self.foobar += 1 # we can change it here and it will be changed throughout the whole class
	print(self.bar, self.foobar) # we can access both of our 'bar' variables

	def print_foobar(self):
	print(self.foobar) # just to see our change from print_bars()

	def print_baz(self):
	try:
	print(baz) # whoops. baz doesn't appear to exist yet because it was defined to only exist in __init__
	except Exception as e:
	print('This prints out because the baz variable does not exist in this scope.')

	baz = self.bar
	print('Okay, now baz exists and is %s' % baz)
	# print('Okay, now bar exists and is {baz}') # New python syntax. I haven't tried this new feature yet.

	if __name__ == '__main__':
	# these will only happen when we run `python3 selfie.py` from the command line.
	example = Selfie(11) # create an instance of the object
	example.print_bars()
	example.print_foobar()
	example.print_baz()

	example2 = Selfie(0)
	example2.print_bars() # This will happen every time: `from selfie import Selfie`, `import selfie` and on the command line when we `python3 selfie.py`
	# I abuse this fact in some of my code, but you generally don't want any logic outside of a function or outside of a class.
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