Python 3.4 - Closures


Closures have access to the outer functions arguments and variables.  


def outer_func():
    message = 'hi'
    def inner_func():
        print(message)

    return inner_func

my_func = outer_func() # this creates a function
my_func() # this runs the functon using the out_funcmy_func() # three timesmy_func()

print('---------------------------------')


def outer_func(msg): #this is a bit different because it takes a message now    message = msg # an message is equal to the message variable set
    def inner_func():
        print(message)

    return inner_func

hi_func = outer_func('hi sucka') #these need an argument to workhello_func = outer_func('hello')

hi_func()
hello_func()


print('---------------------------------')

 /Users/mattfassnacht/PycharmProjects/untitled10/venv/bin/python /Users/mattfassnacht/PycharmProjects/untitled10/math.py
hi
hi
hi
---------------------------------
hi sucka
hello

Process finished with exit code 0

https://www.youtube.com/watch?v=swU3c34d2NQ

Comments

Post a Comment

Popular posts from this blog

Python 3.4 - Caesar Cipher

Caesar ciphers take a list of values and rotates through them to give them a different value. The program below takes from the alphabet and creates a cipher of the message. It returns many variations of the cipher then returns the actual message. import string import collections def caesar (rotate_string , number_to_rotate_by): upper = collections.deque(string.ascii_uppercase) lower = collections.deque(string.ascii_lowercase) upper.rotate(number_to_rotate_by) lower.rotate(number_to_rotate_by) upper = '' .join( list (upper)) lower = '' .join( list (lower)) return rotate_string.translate( str .maketrans(string.ascii_uppercase , upper)).translate( str .maketrans(string.ascii_lowercase , lower)) my_string = 'This is the message' my_string2 = caesar(my_string , 1 ) for i in range ( len (string.ascii_uppercase)): print (i , "|" , caesar(my_string2 , i)) /Users/mattfassnacht/PycharmProjects/untitled12/venv/bin/pyt
Read more

UML - Use Case Diagram

Image
UML stands for unified modeling language. It is used to create a blueprint for a project. A use case diagram is a list of steps needed to reach a goal. Its defines what is required and how those requirements are met. You will narrow down what you have to have. Before you create a use case diagram you need to create a description of the use case diagram. For example the above would look something like this: Use case descriptions includes who the actors are, what the triggers are, and other elements. Beta versions of a project have Shall requirements, should requirements can be done but can be done later. A use case diagram uses stereotypes to represent an element of your system. https://whatis.techtarget.com/definition/use-case-diagram https://www.youtube.com/watch?v=OkC7HKtiZC0
Read more