text stringlengths 1 81 | start float64 0 10.1k | duration float64 0 24.9 |
|---|---|---|
method which is amazing because now I | 5,218.48 | 5.639 |
can keep all of my error checking in one | 5,221.28 | 5.879 |
place in the setter and it will now get | 5,224.119 | 5.52 |
called either when I create the object | 5,227.159 | 5.441 |
for the first time because of in it or | 5,229.639 | 5.241 |
even if the you the programmer tries to | 5,232.6 | 5.24 |
circumvent that init method and change | 5,234.88 | 4.88 |
the value of this attribute my Setter | 5,237.84 | 4.48 |
will also get called my Setter will get | 5,239.76 | 6.359 |
called anytime I access. house but | 5,242.32 | 6.76 |
there's one fix I need to make | 5,246.119 | 7 |
unfortunately I have collided names | 5,249.08 | 7.36 |
right now if we go up here on line five | 5,253.119 | 5.56 |
this is an instance variable it's a | 5,256.44 | 4.64 |
string inside of myself inside of the | 5,258.679 | 4.601 |
current student object called name and | 5,261.08 | 5 |
this is another instance variable called | 5,263.28 | 5.32 |
House unfortunately if I have an | 5,266.08 | 5.28 |
instance variable called name and house | 5,268.6 | 5.48 |
I cannot also have functions called | 5,271.36 | 4.72 |
house they're going to collide you got | 5,274.08 | 4.24 |
to decide do you want the variable to be | 5,276.08 | 4.48 |
called house or do you want the function | 5,278.32 | 4.2 |
to be called House unfortunately you | 5,280.56 | 3.559 |
can't have both because now Python's | 5,282.52 | 3.679 |
going to confuse one for the other so | 5,284.119 | 4.481 |
the conventional fix for this is to do | 5,286.199 | 6.281 |
this to have the setter not store the | 5,288.6 | 6.599 |
value that's passed in in self. house | 5,292.48 | 4.84 |
but to use an almost identical name but | 5,295.199 | 4.201 |
to use a little indicator that you means | 5,297.32 | 4.04 |
you know you're doing this correctly you | 5,299.4 | 4.16 |
typically by invention put an underscore | 5,301.36 | 5.72 |
in front of the instance variable's name | 5,303.56 | 5.2 |
and when you return it up here you | 5,307.08 | 4.96 |
similarly put an underscore so now | 5,308.76 | 5.64 |
technically my instance variable is | 5,312.04 | 6.84 |
called underscore house but my property | 5,314.4 | 7.239 |
which is a fancier attribute if you will | 5,318.88 | 6.6 |
is called house alone huge amount of | 5,321.639 | 6.361 |
syntax I know but it's a very powerful | 5,325.48 | 4.719 |
feature and again this is why you can | 5,328 | 4.4 |
graduate from dictionaries alone and | 5,330.199 | 4.361 |
have so much more functionality at your | 5,332.4 | 4 |
disposal let me go ahead and clear my | 5,334.56 | 3.32 |
terminal window and run python of | 5,336.4 | 4.6 |
student. enter name all right let's go | 5,337.88 | 5.279 |
ahead and type in Harry let's go ahead | 5,341 | 4.159 |
and type in Gryffindor crossing my | 5,343.159 | 5.321 |
fingers as always and now look invalid | 5,345.159 | 5.921 |
house this is a good thing why because | 5,348.48 | 6.159 |
notice in my main function I'm still | 5,351.08 | 6.76 |
trying maliciously if you will to change | 5,354.639 | 5.6 |
Harry's house to not be one of the four | 5,357.84 | 3.799 |
valid ones I'm trying to change it to | 5,360.239 | 3.4 |
his childhood home of number four | 5,361.639 | 4.681 |
private drive but because python knows | 5,363.639 | 4.641 |
that wait a minute you're trying to | 5,366.32 | 5.12 |
assign that is set a value and that | 5,368.28 | 6.08 |
value AKA house is now defined as a | 5,371.44 | 4.56 |
property you're going to have to go | 5,374.36 | 4.08 |
through the setter function instead to | 5,376 | 5.199 |
even let you change that value and | 5,378.44 | 5.799 |
because I have this rais value error if | 5,381.199 | 5.48 |
the house is not as intended you're not | 5,384.239 | 3.92 |
going to be allowed to change it to an | 5,386.679 | 3.761 |
invalid value so I'm protecting the data | 5,388.159 | 4.241 |
on the way in through the init method | 5,390.44 | 4.56 |
and I'm even defending the data if you | 5,392.4 | 4.839 |
try to override it there so I think the | 5,395 | 4.28 |
only solution for me the programmer is | 5,397.239 | 4.161 |
don't try to break my own code let me | 5,399.28 | 3.68 |
remove that line because it's just not | 5,401.4 | 3.6 |
going to work let me run python of | 5,402.96 | 4.52 |
studenty and again type in Harry type in | 5,405 | 4.84 |
griffindor enter and Harry is indeed | 5,407.48 | 4.239 |
from Gryffindor if I did something | 5,409.84 | 6.04 |
incorrect like Harry from number four | 5,411.719 | 7.52 |
Private Drive enter we're again going to | 5,415.88 | 5.52 |
see the value error because my code just | 5,419.239 | 5 |
doesn't let that value in Via manual | 5,421.4 | 7 |
input now or via that adversarial change | 5,424.239 | 6.161 |
all right that was a lot but any | 5,428.4 | 5.4 |
question on | 5,430.4 | 5.839 |
properties uh while we are using gets | 5,433.8 | 4.48 |
and Setters it's just for the purpose so | 5,436.239 | 5.201 |
that we can find that um that function | 5,438.28 | 6.16 |
that method that function in in our code | 5,441.44 | 4.44 |
the reason that I'm going through the | 5,444.44 | 2.84 |
trouble of defining this getter or | 5,445.88 | 4.359 |
Setter is because I want to make sure | 5,447.28 | 5.56 |
that programmers can not do things like | 5,450.239 | 4.281 |
this if I'm going through the trouble of | 5,452.84 | 4.64 |
validating the attributes for these | 5,454.52 | 4.88 |
student objects I don't want you to be | 5,457.48 | 3.639 |
able to go in there and just change them | 5,459.4 | 4.44 |
at will I want to have some control over | 5,461.119 | 4.161 |
that object so that you can just trust | 5,463.84 | 2.96 |
that it's going to be correct as | 5,465.28 | 4.2 |
designed so using a getter and Setter | 5,466.8 | 4.8 |
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