text stringlengths 1 81 | start float64 0 10.1k | duration float64 0 24.9 |
|---|---|---|
define a main function in here too just | 4,311.04 | 4 |
for the purposes of testing and i'm | 4,313.36 | 2.96 |
going to go ahead and define a main | 4,315.04 | 4 |
function that simply does a couple of | 4,316.32 | 6.64 |
tests for instance it calls uh hello of | 4,319.04 | 6.32 |
quote-unquote worlds shall we say and | 4,322.96 | 4.64 |
then it's going to call goodbye of quote | 4,325.36 | 4.56 |
unquote world as well and hopefully what | 4,327.6 | 3.599 |
i'll see on the screen then is hello | 4,329.92 | 3.12 |
world and goodbye world when i run this | 4,331.199 | 3.761 |
program of course as always i need to | 4,333.04 | 3.84 |
explicitly tell python to call that | 4,334.96 | 3.6 |
function so i'm going to call main at | 4,336.88 | 3.44 |
the very bottom of this file all right | 4,338.56 | 4.96 |
let's try it out python of sayings.pie | 4,340.32 | 5.44 |
enter and indeed i see hello world and | 4,343.52 | 3.76 |
goodbye world and so i think it's | 4,345.76 | 3.28 |
reasonable for me to assume that these | 4,347.28 | 3.919 |
functions albeit simple are pretty | 4,349.04 | 4.32 |
correct at this point but now suppose | 4,351.199 | 4 |
that i want to use these functions as | 4,353.36 | 3.44 |
though i've indeed created my own | 4,355.199 | 4.48 |
library my own python module that makes | 4,356.8 | 4.72 |
available a hello function for me or | 4,359.679 | 3.52 |
anyone else who wants to use it or a | 4,361.52 | 3.84 |
goodbye function as well well let me go | 4,363.199 | 5.281 |
ahead and open up again say.pi but start | 4,365.36 | 5.28 |
fresh and rather than have the cow say | 4,368.48 | 4.96 |
anything let me go ahead and have my own | 4,370.64 | 5.2 |
library do the talking so i'm going to | 4,373.44 | 4.88 |
go ahead and as before import sys so | 4,375.84 | 3.92 |
that i have access to command line | 4,378.32 | 4.32 |
arguments and from my own module called | 4,379.76 | 5.439 |
sayings i'm going to import hello so | 4,382.64 | 4.24 |
because i created a file called | 4,385.199 | 3.281 |
sayings.pi | 4,386.88 | 4.16 |
i can say from sayings and it's inferred | 4,388.48 | 4.56 |
by python that i mean sayings.pi at | 4,391.04 | 3.679 |
least in this current directory but i | 4,393.04 | 3.52 |
specifically going to import just one of | 4,394.719 | 4.321 |
the functions for now namely hello and | 4,396.56 | 4.32 |
now i can do something like this if the | 4,399.04 | 4.24 |
user obliges by giving me two command | 4,400.88 | 4.4 |
line arguments which i can check by just | 4,403.28 | 4.56 |
checking the length of sys.org v i'm | 4,405.28 | 4.879 |
going to then go ahead and call this new | 4,407.84 | 4.92 |
hello function passing is its input | 4,410.159 | 4.881 |
assist.rgv bracket1 which should | 4,412.76 | 3.88 |
hopefully be the person's name which i'm | 4,415.04 | 2.96 |
going to expect them to type at the | 4,416.64 | 3.28 |
prompt so here we go i'm going to go | 4,418 | 4.159 |
down to my terminal window run python of | 4,419.92 | 5.44 |
say.pi and my own name because i want my | 4,422.159 | 4.56 |
own name to end up in the command line | 4,425.36 | 3.04 |
arguments and therefore be part of the | 4,426.719 | 3.601 |
hello so when i hit enter in just a | 4,428.4 | 4 |
moment i should hopefully see hello | 4,430.32 | 5.28 |
comma david so here we go enter | 4,432.4 | 6.48 |
and huh i see hello world goodbye world | 4,435.6 | 6.72 |
and then i see hello david so | 4,438.88 | 6.24 |
why is this happening well it turns out | 4,442.32 | 4 |
even though i've done everything | 4,445.12 | 4.48 |
according to our own past practice it's | 4,446.32 | 5.76 |
not really the right way to go about | 4,449.6 | 5.04 |
calling maine after all if i'm blindly | 4,452.08 | 4.24 |
calling main here at the bottom of my | 4,454.64 | 3.12 |
file that means whenever this file is | 4,456.32 | 3.52 |
loaded by python main is going to get | 4,457.76 | 4.64 |
called and unfortunately that's true | 4,459.84 | 5.04 |
even if i'm importing this file or just | 4,462.4 | 4.64 |
a function from this file as i am here | 4,464.88 | 4.799 |
in my say.pi program this is to say on | 4,467.04 | 5.199 |
mine three here when i say from sayings | 4,469.679 | 4.641 |
import hello this effectively tells | 4,472.239 | 4.881 |
python to go find that module sayings.pi | 4,474.32 | 4.8 |
read it from top to bottom left to right | 4,477.12 | 3.76 |
and then import specifically the hello | 4,479.12 | 3.76 |
function unfortunately by the time | 4,480.88 | 3.76 |
python has read the file from top to | 4,482.88 | 4.24 |
bottom left to right that last line of | 4,484.64 | 5.039 |
code recall is to call main main gets | 4,487.12 | 5.2 |
called no matter what so really the | 4,489.679 | 4.961 |
right way to go about using a main | 4,492.32 | 4.16 |
function which does solve that problem | 4,494.64 | 3.36 |
of ensuring that we can order our | 4,496.48 | 3.28 |
functions however we want and all the | 4,498 | 3.6 |
functions will be defined at the time | 4,499.76 | 3.72 |
they're invoked i shouldn't be | 4,501.6 | 3.76 |
unconditionally calling main at the | 4,503.48 | 3.64 |
bottom of this or really any of my | 4,505.36 | 3.76 |
programs i should instead use this | 4,507.12 | 4.64 |
technique i should say if underscore | 4,509.12 | 5.039 |
underscore name underscore underscore | 4,511.76 | 4.8 |
equals equals quote unquote underscore | 4,514.159 | 4.881 |
underscore main underscore underscore | 4,516.56 | 5.2 |
close quote then and only then should | 4,519.04 | 5.52 |
you actually call main well it turns out | 4,521.76 | 4.64 |
that this variable is a special symbol | 4,524.56 | 4.159 |
in python underscore underscore name | 4,526.4 | 4.48 |
underscore underscore and notice that vs | 4,528.719 | 3.921 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.