Python 3.4 - Downloading Images

Programs do a lot of the work for you, or they should. It also shouldn't be work to get program to do all the work we don't want to do. Take for example this tutorial. If you want to download images from a site you don't have to do it one at a time. You can simply write a function to do it for you. Modules do most of the work for you.

This function would save whatever image you downloaded in the file directory for this file.  

import urllib.request
import random


def downloader(image_url):
    file_name = random.randrange(1,10000)
    full_file_name = str(file_name) + '.jpg'
    urllib.request.urlretrieve(image_url,full_file_name)


downloader(url)

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

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