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what's called its own package manager
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this one here called pip which is just
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one so pip is a program that generally
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comes with python itself nowadays that
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allows you to install packages onto your
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own macs or pcs or cloud environment by
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just running a command and then voila
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you have access to a whole new library
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in python that didn't come with python
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itself but now it's available on your
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system
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for you let's go back to vs code here
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and in my terminal window i'm going to
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go ahead and type pip install
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cow say now what's going on here pip is
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the command the package manager and i
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want to install what package the package
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called cow say i'm going to go ahead and
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hit enter here and after a little bit of
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output it has successfully installed cow
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say now what does that mean that means i
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can now go about importing this into my
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own code well let's go ahead and see
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what this means let me go ahead and
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create a new file with code called say
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dot pi because i want something to be
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said on the screen and in my new tab
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here i'm going to go ahead and import
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cowse which presumably is now installed
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i'm now going to import sys as well
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because i'd like to use some command
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line arguments in this program just so
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that i can run it quickly and without
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using the input function i can get the
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user's name immediately from the prompt
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and let me go ahead and do this i'm
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going to do a bit of error checking
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proactively this time and rather than
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use less than or greater than i'm this
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time going to say if the length of
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sys.org v does
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does equal two so if the human is
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provided just the name of the program
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and their own first name we're good to
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go
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i'm going to do the following i'm going
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to call a function called
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cow
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in the package called cow say and i'm
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going to pass in a string hello
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comma and then as in the past i'm going
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to pass in just one string because
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according to its documentation it's not
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like print i can't pass in comma this
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comma that i can only pass in one string
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so i'm going to concatenate the contents
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of sis.org v bracket one so long as then
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i type in my name david after the name
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of this program it should end up in
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sys.org v1 in which case this line 5 of
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code should concatenate hello with my
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name with a space in between and
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apparently a cow is going to say it so
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let's see what happens here
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let me go ahead and clear my screen and
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increase the size of my terminal window
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let me go ahead and run python of say
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dot pi and type my name david and enter
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there is the program called kausei it
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literally has a cow say something on the
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screen and this is a throwback to a
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program from yesteryear that tended to
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come with a lot of systems
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this is otherwise known as ascii art
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it's a textual way using just keys on
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your keyboard to print pictures of sorts
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on the screen now we can really go down
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the rabbit hole here and there's
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questionable academic value of doing so
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so i'll do so just once turns out the
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cow say package comes with other
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functions as well one of those functions
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for instance is t-rex and if i now
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increase the size of my terminal window
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we'll perhaps see where we're going with
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this let me now run again python of
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say.pi this time let me not provide my
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name just to see if it's broken
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it's still okay because we have that if
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condition if the length of sys.rgv
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equals equals 2 and only if it equals
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equals 2 do we do anything that's why
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we're not seeing anything here let me go
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ahead and cooperate now say.pi space
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david and it's no longer a cow but
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if i zoom out on my screen a t-rex why
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just because these are the things you
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can do once you know how to program you
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can even package them up and make them
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freely available to others as open
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