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then I'm using not bracket zero or one
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because these are dictionaries now not
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list but why am I using single quotes to
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surround house and to surround name
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why single quotes inside of this
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F string
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to access those Keys yes um because you
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have double quotes
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in that in that line 12 and so you have
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to tell python to differentiate exactly
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because I'm already using double quotes
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outside of the F string if I want to put
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quotes around any strings on the inside
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which I do need to do for dictionaries
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because recall when you index into a
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dictionary you don't use numbers like
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lists 0 1 2 onward you instead use
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strings which need to be quoted but if
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you're already using double quotes it's
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easiest to then use single quotes on the
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inside so python doesn't get confused
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about what lines up with what so at the
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moment when I run this program it's
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going to print out those hellos but
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they're not yet sorted in fact what I
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now have is a list of dictionaries and
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nothing is yet sorted but let me tighten
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up the code too to point out that it
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doesn't need to be quite as verbose if
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you're in the habit of creating an empty
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dictionary like this on line six and
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then immediately putting in two keys
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name and house each with two values name
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and house respectively you can actually
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do this all at once so let me show you a
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slightly different different syntax I
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can do this give me a variable called
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student and let me use curly braces on
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the right hand side here but instead of
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leaving them empty let's just Define
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those keys and those values now quote
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unquote name will be name and quote
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unquote house will be house this
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achieves the exact same effect in one
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line instead of three it creates a new
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non-empty dictionary containing a name
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key the value of which is the student's
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name and a house key the value of which
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is the student's house nothing else
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needs to change that will still just
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work so that if I again run python if
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students.pi I'm still seeing those
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greetings but they're still not quite
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actually sorted well what might I go
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about doing here in order to what could
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I do to improve upon this further
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well we need some mechanism now of
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sorting those students but unfortunately
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you can't do this we can't sort all of
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the students now because those students
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are not names like they were before they
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aren't sentences like they were before
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each of the students is a dictionary and
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it's not obvious how you would sort a
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dictionary inside of a list so ideally
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what do we want to do if at the moment
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we hit line 9 we have a list of all of
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these students and inside of that list
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is one dictionary per student and each
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of those dictionaries has two keys name
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and house wouldn't it be nice if there
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were ran code to tell python sort this
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list by looking at this key in each
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dictionary because that would give this
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the ability to sort either by name or
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even by house or even by any other field
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that we add to that file so it turns out
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we can do this we can tell the sorted
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function not just to reverse things or
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not it takes another position National
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it takes another named parameter called
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key where you can specify what key
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should be used in order to sort some
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list of dictionaries and I'm going to
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propose that we do this I'm going to
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first Define a function temporarily for
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now called get name and this functions
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purpose in life given a student is to
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quite simply return the student's name
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from that particular dictionary so if
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student is a dictionary this is going to
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return literally the student's name and
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that's it that's the sole purpose of
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this function in life what do I now want
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to do well now that I have a function
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that given a student will return to me
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the student's name I can do this I can
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change sorted to say use a key that's
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equal to whatever the return value of
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get name is and this now is a feature of
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