text stringlengths 1 81 | start float64 0 10.1k | duration float64 0 24.9 |
|---|---|---|
super. double init yes but in this case | 8,944.2 | 6.8 |
I'm only passing a name on line 18 and | 8,948.359 | 5.761 |
I'm only passing in name on line 10 why | 8,951 | 5.319 |
because on line two when I Define the in | 8,954.12 | 4.64 |
it method for the wizard class I only | 8,956.319 | 4.96 |
expect a single argument but I could | 8,958.76 | 3.92 |
absolutely have under common | 8,961.279 | 2.681 |
functionality like I could add in a | 8,962.68 | 3.36 |
petronis if both students and professors | 8,963.96 | 3.72 |
have patronises that can come out of | 8,966.04 | 4.16 |
their wands I could have two arguments | 8,967.68 | 4.719 |
instead we've been using this feature of | 8,970.2 | 3.84 |
object-oriented programming now for | 8,972.399 | 3.561 |
quite some time in the form of | 8,974.04 | 3.8 |
exceptions indeed if you look at the | 8,975.96 | 3.92 |
official documentation for exceptions in | 8,977.84 | 3.96 |
Python you'll see that there's not even | 8,979.88 | 3.68 |
the ones we've seen in class like value | 8,981.8 | 3.8 |
error and others there's any number of | 8,983.56 | 4.48 |
others as well but they are all | 8,985.6 | 4.4 |
themselves hierarchical in nature this | 8,988.04 | 4.279 |
is just a subset of the available | 8,990 | 4.2 |
exceptions that come built into Python | 8,992.319 | 3.681 |
and you can actually as a programmer | 8,994.2 | 4 |
create your own exceptions as well but | 8,996 | 4.92 |
as this chart here uh captures | 8,998.2 | 5.199 |
hierarchically all exceptions we've seen | 9,000.92 | 5.24 |
thus far actually descend from or | 9,003.399 | 5.721 |
inherit from Super classes already so | 9,006.16 | 4.48 |
for instance at the bottom of this list | 9,009.12 | 3.199 |
here is value error which we've seen | 9,010.64 | 3.92 |
quite a bit and if you follow the line | 9,012.319 | 4.441 |
straight up on this asky rendition of | 9,014.56 | 4.6 |
this chart you'll see that value error | 9,016.76 | 4.559 |
has a parent class or super class called | 9,019.16 | 4 |
exception and the exception class | 9,021.319 | 3.881 |
meanwhile has a parent class called base | 9,023.16 | 4.199 |
exception why did the authors of python | 9,025.2 | 4.04 |
do this well it turns out that whether | 9,027.359 | 5.441 |
you have a uh value error or a key error | 9,029.24 | 5.48 |
or an assertion error or any number of | 9,032.8 | 4.4 |
others there's a lot of functionality | 9,034.72 | 5.48 |
common to all of those types of errors | 9,037.2 | 5.84 |
that you want uh all that you want a | 9,040.2 | 5.36 |
programmer to be able to use and so it | 9,043.04 | 4.2 |
turns out that the the authors of python | 9,045.56 | 3.799 |
decided you know what let's not have a | 9,047.24 | 5.159 |
dozen or more different classes that all | 9,049.359 | 4.761 |
just have copy pasted similar | 9,052.399 | 3.441 |
functionality let's create this | 9,054.12 | 3.56 |
hierarchy so that even though the | 9,055.84 | 3.28 |
exceptions toward the bottom of this | 9,057.68 | 3.719 |
list are very precise they at least | 9,059.12 | 4.84 |
inherit that is borrow some very common | 9,061.399 | 4.761 |
functionality up above so it turns out | 9,063.96 | 4.2 |
that when you use the try and the accept | 9,066.16 | 4.36 |
keyword in Python generally speaking | 9,068.16 | 4.4 |
we've tried to catch very specific | 9,070.52 | 4.04 |
exceptions like value error but | 9,072.56 | 4.36 |
technically you could capture the parent | 9,074.56 | 4.44 |
or even the grandparent exception | 9,076.92 | 4.16 |
forgiven exception especially if you're | 9,079 | 3.72 |
not necessarily sure which one is going | 9,081.08 | 3.96 |
to get raised or better yet there could | 9,082.72 | 4.28 |
be many exceptions that get raised but | 9,085.04 | 3.92 |
you want to handle them all the same and | 9,087 | 3.6 |
you don't want to necessarily enumerate | 9,088.96 | 3.88 |
them in parentheses separated by commas | 9,090.6 | 3.759 |
you want to say you want to handle all | 9,092.84 | 4.04 |
exceptions of a certain super class in | 9,094.359 | 4.681 |
much the same way so this has been | 9,096.88 | 3.84 |
latent this whole time anytime we've | 9,099.04 | 4.04 |
seen or used or caught or now raised | 9,100.72 | 4.599 |
exceptions and built into python is this | 9,103.08 | 3.68 |
hierarchy and if you were to invent your | 9,105.319 | 3.521 |
own exception generally you wouldn't | 9,106.76 | 3.48 |
want to start from scratch you would | 9,108.84 | 4.08 |
want to descend from that is subass one | 9,110.24 | 4.6 |
of these existing exceptions and add | 9,112.92 | 3.88 |
your own twist on it your own | 9,114.84 | 4.92 |
functionality as well well there's one | 9,116.8 | 4.639 |
final feature of object-oriented | 9,119.76 | 3.44 |
programming that we'd like to share with | 9,121.439 | 4.081 |
you today and that it will perhaps be | 9,123.2 | 3.96 |
quite the eyeopener is what you can | 9,125.52 | 3.6 |
really do now that you have classes at | 9,127.16 | 4.8 |
your disposal and this too surprise has | 9,129.12 | 4.08 |
been a feature you and I have been | 9,131.96 | 3.56 |
taking for granted for weeks now this | 9,133.2 | 3.92 |
has just worked but it's been | 9,135.52 | 3.28 |
implemented in a way that you can now | 9,137.12 | 4.04 |
leverage yourself it turns out that | 9,138.8 | 4.36 |
Python and some other languages too | 9,141.16 | 4.199 |
support this notion of operator | 9,143.16 | 4.6 |
overloading whereby you can take very | 9,145.359 | 5.561 |
common symbols like plus or minus or | 9,147.76 | 6.08 |
other such syntax on the on the keyboard | 9,150.92 | 4.88 |
and you can Implement your own | 9,153.84 | 4.479 |
interpretation thereof plus does not | 9,155.8 | 5.72 |
have to equal uh addition and minus does | 9,158.319 | 5 |
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