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Video tags
Subtitles
Russian
00:00:00
guys, hello everyone, today I want00:00:02
to tell you a little about useful things for those00:00:04
in python if you are interested in this video00:00:06
then continue watching00:00:13
in general we often get the question about whether it is possible to00:00:16
use00:00:18
nursery libraries like And if they are not00:00:21
the main one and so on there are actually00:00:23
built-in ones python libraries That00:00:24
is, if you installed python, then these00:00:26
libraries are definitely there. Therefore, there is00:00:28
no escape from you and of course they can be00:00:31
knitted, you even need to do this, well, let's00:00:33
try to figure out which00:00:35
ones don't exist first, I guess00:00:37
I should introduce myself My name is Vika00:00:39
all the time for 100 points True, it’s already the fifth00:00:41
year, only 39,100 points, so on and00:00:44
so forth there is a diploma program engineer00:00:47
raboko worked as a back-end developer and00:00:49
all the social networks you can pick up here there00:00:52
is also a QR code great on my00:00:54
telegram channel where the fart release00:00:56
all sorts of questions just some news,00:00:58
some posts, maybe the QR code is00:01:01
broken, in this case, don’t00:01:03
get upset and just00:01:05
go to the link in00:01:08
the description, you know where, there’s also a link00:01:10
to my cart, you take00:01:13
this Youtube channel so you don’t00:01:15
miss anything By the way, most00:01:16
likely this is the first video in 2023.00:01:20
Congratulations to everyone then, they were waiting for the holiday. It00:01:22
turns out that’s because it’s00:01:25
always cool, the first video should probably be00:01:27
especially funny in some way, but it’s unlikely that00:01:30
this will happen, but oh well, in general, what00:01:33
useful ones do we have for those In general,00:01:34
there are a lot of libraries, if you try to00:01:36
google it, you will see that there are00:01:38
very, very many of them. I wanted to emphasize00:01:41
those that we, in principle,00:01:42
may need for the Unified State Exam. In principle, there may00:01:44
be a few more that you and I may00:01:47
need. Write in the00:01:49
comments If you want to I told them too,00:01:50
but I would basically do the00:01:51
basic ones. These are the ones I usually use. I00:01:57
probably also use Tortoise most often,00:01:59
because here we can pick up a00:02:01
library for combinatorics. A very00:02:03
useful thing, incredibly useful, that’s00:02:05
true, it’s just a Mast Hap for the sake of00:02:07
it alone. switch to python then00:02:13
I won’t say that it’s often useful00:02:17
because I use idol more often, you need to know00:02:19
how it works too, well, maf I00:02:22
now rarely have to00:02:23
use punkts as much as in00:02:25
certain cases, strings Now I00:02:27
don’t use them at all, but still it00:02:29
can be useful Well, for me personally, it’s more convenient to00:02:32
just choose letters Well, let00:02:34
me try to show you something about00:02:37
each one at least like this,00:02:44
let’s start00:02:47
sorting out our libraries, we’ll start with00:02:50
you and I, perhaps On what principle I don’t even00:02:52
know00:02:54
with which one to start with, let's start with00:02:56
staring because it's the simplest How can we00:02:59
even pick it up00:03:00
from the library? Usually I write like this. That is, where from the00:03:05
library the string even gives me a hint.00:03:07
I import everything that is there,00:03:10
of course, it can be specific functions or00:03:12
specific changes, at least something. one thing I’m00:03:15
taking away is everything because it wo00:03:17
n’t break the cat, but at the same time,00:03:20
if you don’t need to rewrite anything,00:03:21
replace it with an asterisk, we take everything right away so that it’s more00:03:23
convenient to understand,00:03:25
it’s not clear that we took the entire entire00:03:27
library,00:03:29
now you can use it But the question is00:03:32
for sure And what kind of library is this in general,00:03:34
how to use it and so on, I usually00:03:36
press Control b and I get00:03:40
exactly the same File library here,00:03:42
all the information about it is a00:03:44
lot of everything and, in principle, that’s exactly what00:03:47
we have with you like this with a green00:03:48
color, this is essentially the color of our00:03:50
documentation, we can find out what is here, in00:03:54
principle, this is a collection of cooling00:03:57
constants. That is, this is just a collection,00:03:59
so to speak, You and I have00:04:01
some specific values, for example, we00:04:04
can display white space and then we00:04:06
will get all our00:04:08
parallel symbols for example, we can00:04:11
only display a skiller case, then we will00:04:13
get with you only the lower letters How to00:04:16
say uppercase letters in Russian00:04:18
In short, you can only have numbers and so00:04:20
on Let's try to make something out of00:04:22
this Let's try, for example,00:04:25
what is there, how to write it, and00:04:28
let's try the skiller display By the way, when00:04:30
you use the library, it starts to be00:04:32
highlighted until this moment, it does00:04:34
n’t seem to be highlighted, you can see I have00:04:35
displayed all possible letters, in00:04:38
principle, I can letters, I can letters only large ones,00:04:40
only small ones, I can00:04:42
only numbers only ten only00:04:45
octal00:04:46
punctuation In short, there’s a00:04:48
lot here enough constants Here you are00:04:51
So by the way, you can see right here00:04:53
how they look, that’s cool00:04:55
enough This is convenient00:04:58
when, for example, you need to sort through00:05:00
all the letters of the alphabet in the 24th task, but I00:05:02
usually do hack work and I just go through the00:05:05
keyboard00:05:08
because they are all there, too, letters00:05:11
like Yes, by the way. By the way, if you ca00:05:13
n’t do this through Control, what else00:05:16
can you do? You can simply write an00:05:17
import string and there is a wonderful00:05:20
opportunity in Python to use00:05:22
paint, it displays some kind of documentation for us,00:05:24
and in this case, if the00:05:26
string library was imported, then I can00:05:29
they're already displaying the documentation here, it'll be00:05:31
like a shortened version here,00:05:33
most of all there's still some incomprehensible code here,00:05:35
just the same description, only00:05:37
in principle it's contained in principle, so00:05:38
you can do it for any library,00:05:40
import Help and see what it does00:05:42
in order to specifically use it00:05:44
It’s better for you and me to also00:05:47
write industrialstring import00:05:50
because if we don’t write the line that00:05:52
was before00:05:54
Yes Varum string import asterisk if we do00:06:00
n’t write this line then in such a00:06:02
situation so that before that I can00:06:04
just write questions and that’s it now in order for00:06:07
me to output,00:06:08
for example, this constant I need the00:06:11
string string to have a point called00:06:13
this specific world for us, like this.00:06:17
It won’t work. But if I00:06:20
comment on this once, it will already work. That’s the kind of00:06:23
confusion. You can say, but I’m just00:06:27
writing here. Print Of course yes it’s00:06:30
clear what you’re thinking about from the speech, I usually00:06:33
just write this and then use00:06:35
what I need, some kind of paint, I00:06:37
need this, and you can write an import string00:06:40
exactly when you want to find out00:06:42
information. That is, if you want to00:06:44
call Help, we had it string with you00:06:46
well, great, we00:06:48
figured it out, that is, we just00:06:49
need some constants further,00:06:52
what else can we talk about with you?00:06:53
Let's try to talk about the magician00:06:56
because it is big enough. That00:06:58
is, I will jump because big to00:06:59
small big small let's go to00:07:01
map let's go to import Map again I can00:07:04
just press [music]00:07:06
Control B and go or I can write00:07:10
Help Move I will also get information00:07:12
and there is a lot of stuff in Map Well, there's just a00:07:16
lot of stuff, so I'll probably be there anyway. That00:07:18
is, it will be on my mouth00:07:21
You can read it more conveniently Here you can read How convenient for you00:07:23
Here too, there’s really a lot of things to00:07:26
look at00:07:28
Firstly, we can again take away00:07:30
some specific constants That is, for00:07:32
example, if I need infinity00:07:34
or the number Pi You can take it all away00:07:36
How, again,00:07:39
if we don’t write From and Pro Map import00:07:44
asterisk then we’ll have to00:07:46
call Map point like this, for example e Let’s00:07:50
pick up perhaps00:07:53
Here you are his family e for example, we want to watch it00:07:56
and see it too We have it in this00:07:59
library, but we’re unlikely to00:08:00
need it for playing themes no less and00:08:03
again, I usually write like this00:08:06
and in this case I don’t have to write Map00:08:10
dot I can immediately write pi this way it’s more convenient It00:08:13
seems good great What else do00:08:16
we have here there are a lot of all00:08:18
sorts of gizmos that are connected with00:08:21
sines There with rock tangents and so on In00:08:24
principle, we don’t need the first thing00:08:25
we need is SEO. I don’t know how to00:08:28
say this, in general, everything is written here that00:08:30
it does, it takes from you and me, they simply00:08:32
find the nearest integer but which is00:08:37
greater than our fractional ones, that is, conditionally00:08:39
speaking For example, if I try to output00:08:42
That is, it rounds the larger side00:08:45
5.7, then it will output me a six, of course,00:08:48
it rounded up And if, for00:08:50
example, I try 5.3, then it will also00:08:53
round up more sides, we will also get00:08:55
a six. That is, it simply00:08:56
rounds more sides and00:08:59
we have the same thing for now, it acts00:09:02
almost completely differently, it00:09:04
rounds on the contrary to the smaller side,00:09:06
in principle it works like int That is,00:09:08
it rounds to the smaller00:09:10
side, in principle, everything is said here that00:09:12
even further there is a computer that is not very good for us00:09:14
will be needed because it returns00:09:16
only the number of options, the00:09:18
library and tortoise will help you and me,00:09:20
so for now let’s skip the cosines of00:09:22
the distance, that is, there are a lot of00:09:24
mathematical functions that will be00:09:25
useful to you, but not computer science, there is an00:09:30
interesting cool factorial, that is,00:09:32
even a function that will calculate the Factor for00:09:33
someone -then numbers Let's check the00:09:36
factorial of the path That is, again, you don't00:09:38
need to write What is the function that00:09:39
calculates the factorial So she calculated everything herself00:09:43
In general, I think it's cool for the time00:09:46
that we have sorted out, that is, this is00:09:48
how you can just go and figure out what00:09:49
's cool look, there are two00:09:52
interesting functions, I don’t remember, they00:09:53
just belong to Python 3 9 at least00:09:56
in my opinion but I could be wrong gsd what00:10:00
is it Here we need to output some00:10:01
two numbers Let’s not use prime numbers Let’s00:10:04
write about 2 and 2400:10:08
What is it GT creedes it was written there was a00:10:11
translation of Green division. That is, it gives00:10:15
us the greatest common divisor. That is, for00:10:17
example, if I had 20-40 here, of00:10:19
course you would have 20, that’s how it00:10:21
happens, and that is, it’s also pretty00:10:23
cool. No algorithms are needed.00:10:25
write Euclideans and so on, and LSM is00:10:28
also a cool little thing, for example This is00:10:30
ours What is it It’s the other way around less common00:10:34
what is it called, well, in short, the smallest common multiple,00:10:36
that is, LSM the smallest00:10:39
common multiple you see 2260 and 260 here in00:10:45
the garden and, accordingly, you can00:10:47
also find GD It’s quite convenient, what else00:10:50
is there interesting here, in principle, I say a lot of things, a lot of cool things, all sorts of00:10:55
logarithms exist. Probably you’re00:10:58
a chance, that is, it also looks like there are00:11:00
degrees, in principle, we don’t need you and me00:11:02
because here we know. And where are the00:11:04
degrees in Python, just two familiar,00:11:07
there is a very interesting function Pro,00:11:09
I really really like it, it’s just a00:11:11
discovery for me What is prot00:11:14
and look00:11:18
at prod you need to give some kind of list at the input, as far as I00:11:20
remember Let’s read00:11:23
what he wants here,00:11:26
that is, he should get some kind of00:11:28
exactly00:11:30
we will talk list That is, I forgot00:11:34
the words in general sequence so to00:11:36
speak So let’s write 1300:11:38
15 17 for example, which it will return to us The00:11:41
products of these numbers themselves That is, how00:11:43
can we find, for example, the sum of some00:11:45
numbers simply by using the sum function?00:11:47
Well, let’s use the sums it returns00:11:50
to us the sum of numbers, so if we00:11:52
take just the same from the Map. We can still00:11:54
take the pipeline and it will return the00:11:55
product of the numbers, but it’s also quite00:11:57
convenient. That is, you have, For example, a bunch of a bunch of00:11:59
Clocks, you need to find the product and00:12:02
instead of writing some kind of loop,00:12:03
you can use just a wire00:12:05
That’s true, I really like this00:12:07
situation, it’s true that it’s quite convenient00:12:08
to work, in principle, there’s a hint for yourself,00:12:10
he says,00:12:12
in short, multiply all the elements that00:12:15
we give him, what else, so there’s00:12:18
probably I won’t find it, I won’t remember in00:12:22
general Yes, that’s all, that’s it and the very, very00:12:24
interesting thing can, of course,00:12:26
be excluded from extracting a square and so on, for00:12:29
example from qrt it will return the nearest00:12:31
square and so on, but it seems to me that what I00:12:35
showed is that00:12:36
we may need as much paint as possible on the Unified State Exam because00:12:39
other things Well, for example, a work00:12:41
can be simpler find just two acquaintances,00:12:43
not multiply the power of two signs, that is,00:12:47
with Map We also figured it out like this, let’s00:12:51
continue to get acquainted with the00:12:53
libraries, let’s move on to the next one. We’ll00:12:55
probably move on to00:12:58
the library and mercury. Let’s start with it, it00:13:02
will also be quite massive, but it’s very00:13:04
very interesting what it is we have a00:13:06
library and a tortus Let's try to00:13:08
pick up the00:13:12
MAF so we don't need import and tortus anymore,00:13:16
just let's see what it's about again,00:13:19
just write Print just wrote it00:13:24
will be simple It's just all the information There's a00:13:27
lot of interesting stuff here, quite00:13:28
interesting indeed, but probably the most00:13:31
important what we have here is a module00:13:33
that relates specifically to00:13:37
minorics, that is, of course, there are others.00:13:39
We have a00:13:41
lot of opportunities here. You can read them, but specifically00:13:46
related to the Unified State Examination. We have very cool ones, there are00:13:49
three, in principle, a function because00:13:52
cabination swifffreeplace we in principle,00:13:54
it’s not such a necessary joke, the product is00:13:57
cool, it’s a cool thing,00:13:59
really, what is it with us00:14:01
again?00:14:03
Let me show you the00:14:05
import protuse. By the way, you can just00:14:08
write the necessary moment right away. Just00:14:10
then press Alt Enter, then it will00:14:13
be imported for you. Also periodically00:14:15
you can do it like this. I propose to00:14:18
do it this way.00:14:19
In general, the product it creates for us is a00:14:25
generator, that is, relatively speaking, this is not00:14:28
a list. Therefore, if we want to get a00:14:30
specific list of combinations, then00:14:32
we will need to bring it all to a sheet,00:14:34
so I’ll write it here, let’s use it00:14:38
with you product00:14:39
we must first write what we will00:14:42
iterate over we will get00:14:43
some combinations everywhere Let’s not know a b00:14:45
c we iterate further we will indicate how many00:14:48
symbolic legs are confused here Where to repeat00:14:51
where p to write but again there are hints00:14:53
that in the product we write repeat a in00:14:56
for the rest we write R, which means how many00:15:01
literally speaking values I will have or00:15:03
how many symbolic ones. Or for example, if we00:15:05
go through the clock, then we will also00:15:07
get new combinations and00:15:09
from how many symbols if we try with00:15:11
you to run it like this, then we will get00:15:13
some then the nonsense of the heels we will get a generator, we00:15:15
need to bring everything to the list so that we can00:15:17
get it. You can see exactly the specific value,00:15:20
we got all possible00:15:22
combinations of the letters a b c by 2, that is, we00:15:26
specifically indicated 2, so we took under 8,00:15:29
showed for example, by 3, I got all00:15:31
possible combinations by 3 and As you can see, the00:15:33
funny thing here is that, for example, we00:15:36
print repetitions here, that is,00:15:38
each letter is taken, it can be repeated00:15:40
any number of times. These are the00:15:42
combinations you and I can get, this is done by the00:15:44
product. If you want to go through, for example,00:15:47
for the eighth task, it’s a cycle through00:15:49
All these combinations can be done00:15:50
simply, for00:15:54
example, A B C00:15:57
A B C00:16:01
rebite re and00:16:04
equal Dron and just Let's print oh00:16:09
so Let's try to output As you can see,00:16:12
I also get all possible combinations,00:16:13
but I already have them each separately, it is00:16:15
also displayed a normal topic here00:16:17
Probably it is important to say that note that00:16:19
if I wrote it in the order ABC, then00:16:21
they will also be printed in that order,00:16:22
that is, First with the letter and00:16:24
then I will with the letter b then with the letter00:16:27
That’s also quite a cool thing00:16:29
of paint for the eighth tasks When we need00:16:31
combinators, we need to select words if00:16:33
I was here, for example, not some kind of00:16:35
string, but just some numbers, in00:16:38
principle, nothing would have worked,00:16:40
I had here there would have been a list of numbers, I00:16:43
got exactly combinations of these numbers,00:16:46
that is, look at combinations of three00:16:47
ones here, 2 ones and a two here00:16:50
there may not necessarily be just strings, there00:16:52
may be lists of anything, that00:16:54
is, it simply takes from something and00:16:56
combines these elements and lines and00:16:59
lines takes combined00:17:00
elements from a list and so on. We00:17:02
have discussed this about that is, promatations are00:17:04
also useful the thing only here no longer00:17:06
repeats it is necessary to write00:17:08
and here we also get combinations in the same way,00:17:11
maybe someone is afraid to go through00:17:12
earlier principle Nick is not there but only here00:17:15
The trick is that there are no repetitions That is,00:17:17
here if I have a 1 written once,00:17:19
then it will be in I’m00:17:21
repeated everywhere only once Let’s00:17:23
take 2 each That is, I do00:17:26
n’t accidentally double any symbol here, that00:17:29
is, if there is only one then I take it either00:17:30
once or don’t take it at all, these are the00:17:33
combinations you and I will get, this is also00:17:34
very important but note that there are both 100:17:37
2 and 2 1, that is, we are here checking all the00:17:39
options by location, that is,00:17:41
here it is very important for you and me,00:17:45
that is, the position is important to us here, we are00:17:47
looking with you00:17:48
[music]00:17:49
two lists but they are in different positions00:17:52
our element is located, which means these are two00:17:54
different lists,00:17:55
you can do permutations, this is important00:17:57
when you and I have a task where each00:17:59
letter or each number is repeated exactly00:18:01
once, as with a letter, again, a b c00:18:06
But it’s important if you write some letter00:18:09
twice, that means you will, in00:18:12
principle, have the option When it is00:18:13
repeated twice That is, how many00:18:15
times is indicated here, so many times it can00:18:17
occur or may not occur at all00:18:19
That is, this is where00:18:20
combinations of these symbols are taken, which are no00:18:22
new ones are added,00:18:25
2 of those that are found here are taken This is00:18:27
the first one and we also have00:18:29
combinations. What does it do? It also00:18:32
returns a combination, but here it’s already a00:18:34
unique combination, then here it does00:18:36
n’t look at the location, that is, for00:18:38
example, A B and Ba, it will be the same00:18:41
on the combination itself. That is, here it is00:18:43
looks like00:18:45
what values are in the list, that is,00:18:48
uniqueness in terms of values, but the00:18:50
order doesn’t seem to matter. That is,00:18:54
the order here is not important, relatively speaking, that is, it’s00:18:56
as if we have such an order here,00:18:58
this is the same thing, but when we00:19:01
use it with you permotations there, as00:19:03
if the order has some meaning.00:19:04
You see, that is, we00:19:06
only get 12 1300:19:08
2131 here, we missed it because it’s00:19:10
essentially the same thing, it’s useful when you00:19:13
need, for example, just combinations00:19:14
to get00:19:15
[music]00:19:17
and not some words and so on In general, there00:19:21
is also a useful thing, very greedy,00:19:23
I told you very briefly because00:19:25
you can sit on this for a long time and how to00:19:27
use it, but you most often say00:19:28
it’s better just to just brute force it in a00:19:31
loop, for example, check every00:19:33
time for some condition this and If00:19:37
it fits, then plus one, it’s very important that00:19:39
we have exactly a tuple returned here. That00:19:41
is, if you want, for example, Let’s00:19:43
run So that you don’t have a list here,00:19:46
as if I’m very cool, I’ll call it a list00:19:47
so as not to frighten you too much. If you00:19:49
want everything here - there was a line,00:19:51
then you will need to glue this together with the help of John. This is how00:19:55
mercury works with you and me, three main things,00:19:57
this is what you and I have00:20:01
combinations00:20:03
permotations product00:20:04
product here you and I have repetitions00:20:09
without repetitions at again different00:20:13
locations we let's take into account Okay and00:20:16
cabinations it's just a combination without00:20:18
taking into account the importance of repetitions without the importance of00:20:21
location somehow00:20:23
So let's Next we've00:20:26
sorted it out for you And the tortus that remains00:20:28
remains grated and00:20:30
fanctus I'll probably tell you about them using a00:20:34
code example let me find it somewhere00:20:36
I left it somewhere for myself, let's00:20:38
start with you and I, probably with a00:20:40
simpler joke about what it is,00:20:46
we have a pretty funny00:20:50
library like that, there's also a lot of00:20:53
interesting stuff there, but we don't need that much of00:20:56
it, in principle, we need it from it00:20:58
there will be only one such decorator and that’s it00:21:01
[music]00:21:03
that is, again, we import if00:21:05
we go over. Well, it would be best to just have a00:21:09
bunch of everything and, in principle, I don’t see00:21:12
any00:21:16
point in using this on the Unified State Exam, you can, of00:21:19
course, read it to find out what it is why, and00:21:21
so on I don’t see much point00:21:23
except for one thing: the cache can be used, in00:21:26
principle, the cache can be simple You00:21:27
can use the cache lesson, why is this again, we00:21:30
can find it, read the information about it, the00:21:38
redux is here with you Now we’ll find the00:21:41
heels, so it’s more convenient to call Help there there00:21:43
won’t be any extra stupid words, but00:21:45
here we have too many, that’s what00:21:48
Low cash is. In short, it00:21:52
caches some elements for you and I. That00:21:55
is, if we call some function and00:21:56
get a value, then it these values00:21:59
will be recalculated every time That00:22:01
is, for example, you constantly call00:22:03
the function from 5 constantly and he will simply00:22:05
remember this value and will not00:22:07
call the function again every time A friend of you00:22:09
to find out what In the end the answer is five00:22:12
what from three In the end the answer is00:22:13
five you are on you spend, for example, two00:22:16
minutes there, it starts this cycle, it will00:22:18
bite this value and accordingly it00:22:19
will automatically give you that is,00:22:21
the cache is like an automatic output of00:22:24
values because it is already immediately00:22:25
saved in the list, as you know, for00:22:27
example, for example, it constantly00:22:29
gives you the same problem in mathematics instead in00:22:32
order to solve it again every time, you will00:22:33
simply learn the answer and00:22:35
return it because, in principle, the problem is00:22:37
exactly like this. This is what he does, if he00:22:39
sees that the task is the same And it was00:22:42
often performed, then he, as if in a smart way,00:22:44
does everything there And remembers the meaning Now,00:22:47
let’s say it’s not very convenient here,00:22:51
so let’s write with you. So let’s00:22:59
try to read with you here00:23:01
because there’s quite a lot of00:23:03
interesting stuff. Look, first of all, here you can00:23:05
specify the maximum size and so on, but00:23:08
in principle it doesn’t matter. What is maxsize00:23:10
if we indicate it to us? oru futures that00:23:15
is, a00:23:16
bonus is such a sheet resnet That is, this is00:23:20
what was just most recently00:23:22
used, that is, in short, I will now00:23:24
translate into Russian That is, it00:23:26
remembers exactly those values, that is, the00:23:28
top 128 values00:23:31
that are called00:23:33
That is, for example, if we have only00:23:35
the function was called at 200 tone value will00:23:38
not remember everything, but only 128 those that were00:23:40
executed more often. This is what it does. If00:23:43
you and I tell us, it turns out that it00:23:45
will remember all the values and no matter how there00:23:47
is a trick here, the trick will not00:23:50
work because the trick is that that he00:23:51
himself understands what values00:23:54
you work on most often like this, I’m00:23:59
telling you about this in short, in short, how can we all work with this?00:24:01
Let’s better figure this out. It’s00:24:04
actually a useful thing. Well, as you can see, it00:24:07
only works on functions because in00:24:08
Kashira the value is the function more In addition,00:24:10
this is useful today for recursive ones00:24:12
because most often the same00:24:14
values are constantly remembered like this00:24:17
From, in principle, we do00:24:21
n’t need anything else Spanishctus Do we need this00:24:24
function in general in life, in principle, for00:24:25
some codes 1921 means it will be00:24:28
useful And I’ll show you on 16 tasks The task is00:24:32
more like a stat city type problem00:24:35
Here's a problem like this Here's a problem if we00:24:38
just try to complete it with you,00:24:40
then the code will be executed for a certain00:24:43
amount of time Well, it's completed after00:24:44
all, if we want to speed up00:24:46
the code with you, then we just write this, which means00:24:49
an annotation In short, and we’re writing here, I’m lying to the00:24:52
porridge, again, I usually don’t even00:24:56
indicate anything. That is, I don’t say00:24:59
max size and so on, but you can if00:25:01
you don’t have 25 there, for example, as much as a million from00:25:06
1000, then you can indicate that00:25:08
Max from NAN That is, this also sometimes00:25:10
speeds up the code, why because otherwise you00:25:13
only have 128 values stored, because of this, the00:25:16
others will be00:25:17
recalculated, but if it00:25:19
works really slowly for you, you can00:25:21
also indicate the maxi to us, then all00:25:23
the values will be based on the latitude, it will00:25:25
work even faster, but how then there00:25:30
may be problems with memory in some situations,00:25:31
see the lesson is written on a function, you need to00:25:34
define it.00:25:35
The trick is that, in principle, I00:25:37
wrote a hand here only on F and it already00:25:41
works quite quickly, but in principle00:25:43
it is advisable, of course, to write both on and on G00:25:46
Well, so that It’s as if the value00:25:49
was cached here and the value00:25:50
was cached here, but it’s possible somewhere in one00:25:53
case sometimes and this helps you and me to00:25:55
speed up the code, if it helps in the00:25:58
sixteenth task Or, for example, another00:26:00
task where there is a function Especially where00:26:02
recursive ones speed up the code because it is00:26:04
wide this value, that is, it does not00:26:05
calculate it anew every time, and a very00:26:07
important point is that without using it on00:26:10
all functions there, it is unlikely that it will greatly00:26:12
speed up the code on recursive ones Yes, on00:26:14
all of them, and some people00:26:17
just stick it in even where there is no function00:26:19
Well, no, this not a magic pill to00:26:22
speed up the code no it’s just00:26:23
caching the exact value of some kind of it most00:26:27
often they need it for recursive ones so00:26:29
panctus figured it out left it erased00:26:32
this year we have task number six a00:26:33
new type has appeared for the turtle I usually00:26:37
solve it through Idol to be honest Well at least00:26:40
My idol lags and suffers on the Mac00:26:43
Now I’m on Windows, but when I’m at home I00:26:45
usually solve T-shirts So, accordingly,00:26:47
problems arise for me and then I00:26:51
can open the library. I’ll tell you right away00:26:53
that I haven’t worked with it much in00:26:56
my life...00:26:58
then at school we made presentations, they00:27:02
played turtle. That’s why let00:27:04
me, that’s why I myself feel like I might actually forget00:27:08
some things, but all the00:27:10
information is there. If it hadn’t happened, of course,00:27:13
I would have trained there and so00:27:15
on, but I now understand that All00:27:17
the documentation for this library is there and00:27:19
therefore there’s no need to worry too much, there’s a00:27:23
lot of information about this module, and basically if you00:27:26
read it all you’ll go crazy,00:27:28
God forbid, but there’s even a lot of example00:27:31
code here it’s00:27:33
downright exhaustive If you00:27:35
read this, you’ll probably know everything in the world00:27:37
about this unfortunate00:27:38
turtle. That is, there’s really a lot of00:27:40
information. I mean, I have a real example00:27:43
of code,00:27:45
I’ll probably save your time and just00:27:48
take the code that I gave to the masters.00:27:52
Maybe I didn’t give it, I gave it00:27:55
just in the Master group. That is, in my00:27:57
course.00:27:58
I suggest you just go through it and00:28:01
figure out what’s most important here.00:28:02
Again, it’s00:28:07
better, by the way, it’s00:28:09
considered good form to make some indents after the names of libraries. That’s00:28:13
not considered very good it’s beautiful to write when00:28:15
it’s all code, but I most often00:28:16
do this because I want to fit00:28:19
as many lines of code as possible,00:28:21
it’s advisable to do some of course.00:28:24
When I write on my own, not for someone else,00:28:26
I really did a lot of indentation00:28:27
to make the code easier to read. But for you I I00:28:30
usually don’t do this Why Because00:28:33
as I said00:28:36
So that most of the code fits00:28:39
Although it happens differently in general, what we have00:28:42
here is interesting Well, look,00:28:44
firstly, you and I have such an00:28:46
opportunity sleep, what is speed?00:28:48
That is, we have with you if we launch00:28:51
this joke00:28:53
By the way, for me it’s very working Yes, I don’t00:28:56
know the law at all, to be honest Because00:29:02
Let’s see,00:29:07
I don’t know the law a little00:29:11
Well, okay, let it be00:29:13
[music]00:29:18
okay,00:29:19
apparently I had it for some Krylov building00:29:21
In short, it’s like00:29:23
we will have a turtle move quickly00:29:25
because otherwise it can move very00:29:27
slowly if you need to draw a lot of points.00:29:29
She will move very slowly00:29:31
here you can order00:29:33
just the same speed of movement if00:29:35
you don’t believe it, then move on Oh, by the way,00:29:37
there’s no real information about her, but I I think00:29:40
somewhere it was possible, in any case,00:29:41
to find information about this, well00:29:44
further LED is what you and I have, just like00:29:47
that, our unit Turtle00:29:50
to the left, here's further Forward, this is00:29:54
just a straight movement for us, is there a00:29:56
movement to the left?00:29:59
to the right That is, I said00:30:02
moving to the left is not true, this is a turn00:30:04
to the left, we indicate what degree we00:30:07
will turn to lie, we indicate How many00:30:09
degrees we are right this way or that Forward00:30:12
is just moving forward That's all00:30:14
here, too, as if I think plus minus00:30:16
Clearly In principle, there are conditions what00:30:18
is Pen we have in this00:30:20
problem, lower the tail, all this00:30:22
is essentially lowering the tail, that is,00:30:23
So we begin00:30:25
to draw further Well, here is a repeat, a repeat,00:30:27
obviously this is just a regular cycle, I’m00:30:29
repeating here, just a straight movement, a00:30:31
90-degree turn movement straight, turn00:30:33
90 degrees, Pen Up is just to00:30:36
raise the tail. That is, he already00:30:38
stops drawing here, that is, here he00:30:40
will draw and all his movements, all00:30:42
his movements will be00:30:44
recorded right here with you and me already00:30:46
nested loop why is this done? And here00:30:49
I’m just drawing00:30:51
[music] the00:30:52
cells. Because this way I’ll just00:30:55
draw some kind of line and it’s00:30:57
not clear to anyone to draw the cells,00:30:59
usually just take a00:31:02
gap of some X’s and just00:31:04
put dots set post This is our00:31:06
staging, this is setting the position set00:31:10
post we change the position and we00:31:12
move to Which specific X to00:31:14
specific Y and DOT this is just the00:31:16
same for us Everything put an end to Well and Yes, this is so that00:31:18
as far as we understand, the year does not fly away00:31:21
right away so that it you and I have a little00:31:23
left, we could look at it00:31:25
differently, how to do it and that’s it And00:31:27
goodbye That is, these are the jokes,00:31:29
that is, this is the most important thing,00:31:32
probably also important That’s exactly what I00:31:34
could do myself Forget this is a set post That00:31:36
is this is exactly what position I should00:31:37
take. That is, he takes and moves my00:31:40
turtle, that’s exactly setting a00:31:43
point with a course too. Of course, this code did00:31:46
n’t turn out very well.00:31:48
Well, okay, I just don’t know where it came from, but I00:31:51
stole it00:31:54
somewhere I had00:31:56
this00:32:03
Yeah, it’s just going too far ahead,00:32:06
let’s not multiply us by 40,00:32:12
now I’ll try to fix the code. If you00:32:15
want to see what it all looks like. And it00:32:17
seems to me that there is a suspicion that00:32:19
you are interested in what it looks like. Let00:32:21
’s not click on 40. 40 turned out to be00:32:22
too much, it just went00:32:25
beyond the limits and that’s it No, it’s still too much00:32:29
Let’s not multiply,00:32:32
why am I multiplying because otherwise it00:32:35
turns out that it’s too small, I00:32:38
kind of increase the scale in the same way as00:32:40
we did with you and in the idol here now I’ll00:32:42
show you a picture, look00:32:47
now I’ll show you,00:32:50
let’s restart it, that00:32:54
is, a window like this pops up in this00:32:56
grate and at first he drew for us, he just00:32:58
went straight to the right and then he starts00:33:01
drawing exactly on the square he drew,00:33:04
then putting dots is almost00:33:07
invisible because, again, I’m too I00:33:08
put a small one Let's put it at 400:33:10
then they will most likely be00:33:12
very large, but nevertheless they are00:33:14
visible. You see here he00:33:17
puts dots using the Dot command, everything00:33:21
in principle, this is all that concerned this00:33:24
library, again, what exactly is00:33:25
needed for the Unified State Exam for the Unified State Exam you need to go from right to left00:33:27
down,00:33:28
raise your tail, lower your tail and put00:33:31
just a full stop, you don’t00:33:33
need anything else, and there’s a lot of00:33:35
interesting stuff there you can do that’s00:33:37
just incredible a little bit, of course I00:33:38
stretched it out, to be honest, the video But00:33:40
again I wanted to go through00:33:43
documentation and all sorts of cool things00:33:45
to show something with an example, so this is how it00:33:47
turned out I hope you00:33:49
liked the video, in any case, it seems to me00:33:51
that these things are quite cool00:33:53
and of course you should use them. I would especially00:33:56
highlight the mouth because it’s00:33:58
just an import, to be honest again,00:34:00
Perhaps it was not completely clear, you00:34:03
need to do all this yourself from experience00:34:06
if you want me to record a separate video about the00:34:08
eighth sensor about this ace00:34:10
Because I don’t remember if it’s on my00:34:12
channel then Write in the comments Or for00:34:14
example, you want if so that I show each00:34:16
library on a specific task00:34:17
and so on, also write in00:34:19
principle, I can implement this, or if there are00:34:21
any other libraries you want00:34:22
me to review, in general, this is the00:34:25
whole situation; you also take away useful00:34:28
files from my description because,00:34:30
again perhaps you still do00:34:31
n’t know python at all, that is,00:34:33
again, I also have a single concrete00:34:35
Roller, which is useful in the description You can00:34:38
choose also there are code templates00:34:41
Just for solving all these problems of00:34:42
the template This is bad, but at least for a start00:34:44
familiarize yourself with what the approximate00:34:45
principle of the solution is, in principle, it’s normal Well, I00:34:48
’m also waiting for you in my wonderful00:34:49
Telegram channel. There you can also00:34:52
pick up all these panics in the pin, they00:34:54
are there, if the link doesn’t work, the qr code,00:34:56
then again, pick it up in the description, I’m glad, happy00:35:00
holidays to everyone, not very good00:35:02
holiday videos, I’m00:35:04
just recording it before the New Year, so I hope00:35:06
that your holiday was wonderful,00:35:08
cool In general, see you Bye bye everyoneDescription:
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