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might read and write from a file and do
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so in a structured way where you can
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somehow have multiple Keys multiple
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values all in the same file without
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having to resort to what would be
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otherwise known as a binary file so a
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binary file is a file that's really just
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zeros and ones and they can be laid out
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in any pattern you might want
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particularly if you want to store not
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textual information but maybe graphical
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or audio or video information as well so
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it turns out that python is really good
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when it comes to having libraries for
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really everything and in fact there's a
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popular Library called pillow that
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allows you to navigate image files as
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well and to perform operations on image
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files you can apply filters a lot
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Instagram you can animate them as well
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and so what I thought we'd do is leave
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behind behind text files for now and
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Tackle one more demonstration this time
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focusing on this particular library and
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image files instead so let me propose
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that we go over here to vs code and
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create a program ultimately that creates
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an animated gif these things are
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everywhere nowadays in the form of memes
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and animations and stickers and the like
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in an animated gif is really just an
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image file that has multiple images
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inside of it and your computer or your
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phone shows you those images one after
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another sometimes on an endless loop
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again and again and so long as there's
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enough images it creates the illusion of
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Animation because your mind and mind
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kind of fills in the gaps visually and
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just assumes that if something is moving
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even though you're only seeing one frame
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per second or some sequence thereof it
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looks like an animation so it's like a
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simplistic version of a video file well
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let me propose that we start with maybe
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a couple of uh costumes from another
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popular programming language and let me
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go ahead and open up my first cost team
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here number one so suppose here that
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this is a costume or really just a
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static image here
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costume1.jif and it's just a static
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picture of a cat no movement at all let
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me go ahead now and open up a second one
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costume2.jif that looks a little bit
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different notice and I'll go back and
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forth this cat's legs are a little bit
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aligned differently so that this was
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version one and this was version two now
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these cats come from a programming
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language from MIT called scratch that
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allows you very graphically to animate
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all this and more but we'll use just
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these two static images costume one and
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costume two to create our own animated
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gif that after this you could text to a
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friend or message them much like any
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meme online well let me propose that we
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create this animated gif not by just
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using some off-the-shelf program that we
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downloaded but by writing our own code
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let me go ahead and run code of
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costumes.pi and create our very own
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program that's going to take as input to
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or even more image file files and then
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generate an animated gif from them by
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essentially creating this animated gif
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by toggling back and forth endlessly
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between those two images well how am I
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going to do this well let's assume that
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this will be a program called
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costumes.pi that expects uh two command
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line arguments the names of the files
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the individual costumes that we want to
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animate back and forth so to do that I'm
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going to import sys so that we
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ultimately have access to sys.org V I'm
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then from this pillow Library going to
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import support for images specifically
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so from pil import image capital i as
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per the library's documentation now I'm
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going to give myself an empty list
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called images just so I have a list in
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which to store one or two or or more of
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these images and now let me do this
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for each argument in sis.org V I'm going
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to go ahead and create a new image
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variable set it equal to this image
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dot open function passing in ARG now
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what is this doing I proposing that
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