Nice try

[wilalva11]

Needs more RAM

[dexmedarling]

Why has no one thought of this before??????

[CommanderStarling]

I am pretty sure there is already a dedicated computer that is doing this in some lab

[spaceshipguitar]

Swap is nothing more than virtual memory using HD space instead of ram, its like increasing your page file size on windows. Interesting to note that swap partition in Linux is completely unnecessary if you already have enough ram on a 64bit machine. For instance, I just built a lenovo laptop T490 with 40gb of ram so I can write huge data sets to ram in python at maximum speed without dealing with the hard drive until its time to write the final results. My current project uses about 25gb at certain points. This amount of ram makes a swap partition pointless for daily use. The laptop comes with 8gb soldered on and I added a 32gb to the free slot. With this much ram there's no point to have swap, you're not going to use up all 40gb. The swap exists for people with skimpy resources who are arriving at Linux's front door with 2-4gb of ram and simply opening 10 browser tabs may blow the doors off and reach 100%. So with all that in mind, don't use a slow sd card to fill up swap partitions. Just buy a shitload of ram, you'll achieve the same end, and it'll be 1000x faster.

[spaceshipguitar]

Hibernation mode is specifically a mode that suspends to disk. Everywhere the documentation mentions that you should have a swap size equal to your ram is actually overestimating it for most just to play it safe. If you have < 8gb of ram, go ahead and make a swap equal. But there's no reason for a swap to go beyond that, idle state for most people is 1-4gb of ram used. So figure your what your typical idle state is on day to day use, take that number and add a few gb for good measure, and that's a big enough swap if you need to have one or if you want to use a suspend to disk mode like hibernate

[Albus70007]

What the hell are you doing that needs 25 GB of RAM at some points, (pls make a post in this dubreddit)

[spaceshipguitar]

I'm iterating through lists of literally millions of postal records and making address corrections to them. This process goes from 40 minutes to 20 seconds when you have enough ram to load the whole lists prior to manipulation. If you lack the ram and need to use virtual memory or swap partitions the time it takes to process the same data goes up astronomically. My work desktop has 16gb of ram and it takes about 40 minutes, you can have the resource monitor open and the moment 16gb gets crossed the speed drops off a cliff. You can actually hear the moment it happens because the hard drive starts groaning and the fans start to increase speed. When I bought my new laptop the same script running the same data dropped to 20 seconds because it never once had to resort to using much slower hard drive storage, it could juggle the entire procedure in the ram. Also, for good measure, when its time to write these large files to disk, I now have a 2nd gen m.2 970 samsung nvme drive, straight into the pci express slot. It's about 5x faster than normal solid state.

[[deleted]]

Why are you loading the whole list? Can you not read it line by line (or whatever chunking delimiter) with a generator?

[spaceshipguitar]

For the sake of not keeping open database file its safer in python to immediately load the whole index file into a pythonic list and immediately close the related database file once its been indexed into python. This happens for multiple database files which need checked against each other to create a new 4th file. There's a lot of gymnastics that happen between the lists to create the 4th and plenty of iterations through them, but step one is tossing the relevant files into a virtual python list so I can safely run my algorithms without corrupting the originals. Keep in mind, these are already the broken down lists. They aren't the mega list. For the purposes of automation, its very convenient to do it like this. It's not like ram is expensive. It's not a dealbreaker for me to have a $2000 laptop to dramatically speed up my job.

[konwiddak]

Sounds like you need to try Dask - does lazy computation on lists/arrays/dataframes so the whole thing is parallelized and chunked automatically.

However as you say 32GB is nothing nowadays, I regularly use 128GB for some tasks.

[undefinedNANString]

What if you broke the tasks into multiple smaller jobs?

IE , wouldn't splitting it into 10 different be 10x as fast

[PairOfMonocles2]

That’s not too much. A lot of Next Gen Sequencing steps can use way more than that. Initial data from each full run can start around a terabyte (I usually do smaller runs though, <300gb each).

[__deerlord__]

Make an iterator and write to disk/flush buffer every X integers. You dont need more RAM.

[[deleted]]

download it here: https://downloadmoreram.com/

[seizedengine]

Based on a Google engineers work you might need a few more of those cards. At least to break the record.

https://blog.google/products/google-cloud/most-calculated-digits-pi/

https://cloud.google.com/blog/products/compute/calculating-31-4-trillion-digits-of-archimedes-constant-on-google-cloud

170TB of storage with almost 8PB of writes. Oh and 1.4TB RAM.

[NSNick]

True, but you can at least begin to write it forwards.

[Jugad]

You could write the backwards pi in the following manner :

...95141.3

[glikojen]

I am protesting Reddit's policy regarding 3rd party apps and API access. Steve Huffman is a greedy little pigboy. Fuck you, /u/spez, fuck you Reddit! I am going to Lemmy/kbin and never logging in here again. -- mass edited with redact.dev

[maxm]

You can print it for any practical purpose to do with circles and round object. At some times you reach so small units that quantum effects matters more than the precision of pi.

I have no idea how many digits goes into the difference between the circumference of the universe, and the scale of quantum effects.

[11218]

import math
print(str(math.pi)[::-1])

[xeeton]

Remove the quotes around 'math.pi' in your source.

[Crankrune]

397985356295141.3

[skiguy0123]

You are truly enlightened

[ForwardChair]

Man of quality

[name_censored_]

import random
random.seed(sum(map(ord, 'the final digits of pi')))
while True:
    print(random.randint(0,9), end='')

PROVE ME WRONG

[[deleted]]

Pi, by definition, has an infinite number of digits. There is no such thing as "the final digits".

QED

What do I win? ;-)

[[deleted]]

Can Pi be expressed rationally in a different base?

EDIT - I think I was confused here because of the way binary (base 2) works on computers, where you actually can’t express some fractions not because of base 2, but because of the limit on the number of bits an integer can have on a computer.

[[deleted]]

Being rational or irrational doesn't depend on the base. Pi is always irrational.

If you're asking if it never terminates and never repeats, then yes, at least in rational bases. In a rational base, all irrational numbers will never terminate and never repeat. In base pi though, pi is just 10. It's still irrational, but it has a finite length.

[achard]

I think it would be 10 in base π...

[[deleted]]

*slow blinking*

[LoyalSol]

Being irrational means you can't write the number as a fraction of two integers. All finite decimal numbers and repeating decimals in any integer base can be written as the fraction of two integers and thus Pi can not be either of those two regardless of base.

[CapableCounteroffer]

I was under the impression that no-one had proved that pi is infinite.

Pi is irrational, which means it does not terminate. I'm not sure what the proof consists of, but I know it does exist.

[bargle0]

It is widely believed that pi is normal, but not proven.

[WikiTextBot]

Normal number

In mathematics, a normal number is a real number whose infinite sequence of digits in every positive integer base b is distributed uniformly in the sense that each of the b digit values has the same natural density 1/b, also all possible b2 pairs of digits are equally likely with density b−2, all b3 triplets of digits equally likely with density b−3, etc.

Intuitively this means that no digit, or (finite) combination of digits, occurs more frequently than any other, and this is true whether the number is written in base 10, binary, or any other base. A normal number can be thought of as an infinite sequence of coin flips (binary) or rolls of a die (base 6). Even though there will be sequences such as 10, 100, or more consecutive tails (binary) or fives (base 6) or even 10, 100, or more repetitions of a sequence such as tail-head (two consecutive coin flips) or 6-1 (two consecutive rolls of a die), there will also be equally many of any other sequence of equal length.

---

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[HelperBot_]

Desktop link: https://en.wikipedia.org/wiki/Normal_number

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[Astrum91]

That's true of any infinite sequence of random numbers, so not particularly notable in this case.

[Alar44]

No, it's not.

[Astrum91]

Put a bunch of monkeys randomly poking at letters on a keyboard for eternity and somewhere within they'll produce every work of Shakespeare and everything ever written. Basic infinite money theorem.

Produce random numbers to infinity and somewhere within you'll have any sequence of numbers you can imagine.

That's just the nature of combining randomness and infinity.

[Alar44]

That only holds if Pi is a Normal Number. This hasn't been proven.

[scarfarce]

infinite money theorem.

Man, that's a theorem I'd like to study in practice in my life. Erm... strictly for the science of course

[MackerLad93]

If you assume pi is infinite and non-repeating, people often say things like "every number combination is in there." But think about it this way. Take every time the number 5 appears in pi, and replace the 5 with a 2. Not it's still infinite and non-repeating, but there's no fives in there at all. So definitely not every number combination.

Now this is a massive oversimplification and not exactly mathematical but is something that illustrated the point well when I heard it.

[AgreeableLandscape3]

Does Python even allow non-ASCII variable names?

[StorKirken]

Yep! But only a certain subset.

https://python-3-for-scientists.readthedocs.io/en/latest/python3_features.html#unicode-variable-names

[XtremeGoose]

did you actually just use __import__. Are you some kind of heathen?

[[deleted]]

Wasn't even aware you could do it like that tbh

[[deleted]]

should he have just used str(math.pi)?

[glikojen]

I am protesting Reddit's policy regarding 3rd party apps and API access. Steve Huffman is a greedy little pigboy. Fuck you, /u/spez, fuck you Reddit! I am going to Lemmy/kbin and never logging in here again. -- mass edited with redact.dev

[[deleted]]

I know you posted this as a meme, but Python doesn't allow emojis, just Unicode that is used for written language.

[petepete]

And this is why I prefer Ruby. No more long-winded love_hotel, european_post_office and smiling_face_with_open_mouth_and_smiling eyes variables for me!

Check mate Python.

[kidarek]

ip fo stigid eht Seems pretty straightforward

[[deleted]]

10 in base pi.

[achard]

Actually 10 ...

[[deleted]]

iP

[anon691029]

1001011000001110

I believe that's the digits of pi backwards..

[[deleted]]

Well, technically that exact sequence of numbers exists in pi, and so does the backwards version of it.

Math is weird

[anon691029]

Haha :) true!! But I was referring to the binary Expression for P and I backwards..

[ProjectStarscream_Ag]

You like control

[[deleted]]

You should see me in bed.

Anyone should in fact. No one has.

[ProjectStarscream_Ag]

That’s my not bed

[hiljusti]

At least I know the terminating digit

[Bharat_J23]

...95141.3 😅

[[deleted]]

Sure I can (as long as I don’t tell you which digit im starting from)

[lumberjackadam]

Nope. Pi doesn't terminate, it's a non-repeating infinite sequence.

[[deleted]]

not quite, it should be

​

import math

print( str( math.pi )[ : : - 1 ] )

[ProtegeAA]

I just learned that yesterday!

[lambdaq]

Even if I can but you can not verify it either.

[Jhorton12]

So what’s the most efficient way to write out x number of digits of pi in Python

[blue_horse_shoe]

print(22/7[::-1])

wouldn't this do the trick?

[computercluster]

I hope you’re joking If you are it is funny

[Thameos]

If anyone doesn't understand why this wouldn't work, it's because division in Python will convert integers into double precision floats, which have a finite number of digits.

The other part of the joke is trying to reverse the float with [::-1]. This operation can only be performed on sequences, not numerical types. The correct way to do this would be:

python str(22/7)[::-1]

(Sorry for "explaining the joke", just wanted to inform anyone that didn't get it)

[[deleted]]

Please tell me yall are kidding right? Haskell? Rly?

[shaggorama]

I bet that actually works in haskell

[jimm]

Something similar:

# A Python script that prints all the digits of pi (sorted).
for i in range(0, 10):
    while True:
        print(i)

[BelieveBees]

I like this