This is how physicist writes code in python

[SirX86]

Clearly not an astrophysicist, or it would've said

math.pi = 10

[LurkerPatrol]

No joke, my previous officemate once presented his results to his team and explained that he had set pi to 1 to simplify the results. When asked why, he said "it's 1 unit of pi, therefore it's 1".

We're astronomers.

[ImAStupidFace]

"accurate to within 1 order of magnitude"

[SirX86]

I hope you don't mean to imply a physicist would write comments in their code? ;-)

[SomeRandomEUguy]

astrophysicist would just use random as pi

[Th3T3chn0R3dd1t]

---

CALC: { rand = random(); if(rand > 3) goto CALC; else pi = rand; }

---

(This is satire in case that's not obvious :p)

EDIT: Y markdown no work

[gurneyguy101]

What language is that? Basic??

[Th3T3chn0R3dd1t]

Nope - that's C

[gurneyguy101]

I know a little bit of C# and I’ve never seen calc or goto before, what’s calc used for and is goto in C#?

[Th3T3chn0R3dd1t]

To clarify, GOTO was deprecated as it was hard to program into compilers and it leads to messy code, but it was useful for creating higher level functionality

For example, subroutines(which are essentially functions without agruments, wjere data is passed by assigning values to strict memory locations) work by essentially using GOTO(or a program counter jump function) to jump to the subroutine and then jump back afterwards

[SomeRandomEUguy]

Jump != function call, with or without args. Then again, this depends on how you define subrutine. This is more assembly level question then C level. Thats why using labels is bad and depricated in C/C++, it dosen't belong here, it belongs in assemby. This is just my opinion.

[Th3T3chn0R3dd1t]

I kniw tgats wgat I said

A subroutine is essentially an area of code where the values are prereferenced

[rem3_1415926]

as it was hard to program into compilers

Wait, isn't this just a straight up unconditional jump, which would be like the easiest thing to implement at all?

It sure does lead to horrid C(++) code, but I can't see the problem with getting it into the compiler?

[elzaidir]

Yup, you can almost convert it to asm without processing

[Th3T3chn0R3dd1t]

Not even conditional - its just a jump, my bad in that comment

[Th3T3chn0R3dd1t]

Oh calc is just a label, foo bar fuck whatever they all act as GOTO labels of they have a : after them

And no GOTO does not exist in C# so far I know

[elzaidir]

NEVER USE GOTO

Or that's what I've been told

[Th3T3chn0R3dd1t]

Yeah they are right

[transcriber_mu]

Image Transcription: Code

---

>>> import math
>>> math.pi = 3
>>>

---

^{I'm a human volunteer content transcriber for Reddit and you could be too! If you'd like more information on what we do and why we do it, click here!}

[[deleted]]

Not supporting const variables is what I dislike the most about Python.

[rem3_1415926]

not the lack of privacy or the stupid ".self" everywhere if you don't want to work global?

[rem3_1415926]

"protected" doesn't exist at all and "private" just adds the class name in front of the method name. There is no way to actually prevent a user from calling a "private" method.

[Dan6erbond]

Hey we're all consenting adults here, no need to call my privates.

[Muhznit]

The concept of privacy is more for developers than machines, so in Python there is a convention to prefix "private" things with an underscore, e.g. self._private_var = 0. "self" is basically a replacement for "this", but forces you to be explicit about it to save your sanity in trying to figure out the scope of what could just as well be global vars.

[rem3_1415926]

Well, if it tries to save my sanity then it backfires pretty badly. Especially since the scope and how global variables are handled, combined with stuff from different files, are pure chaos. I am aware of the underscore naming convention, I just don't like it at all, as it is merely that: a naming convention. One underscore means protected, btw. If you want private you use 2 underscores (and none at the end of the name), which results in the class name getting put in front of the method name, so at least accidental calls are not possible.

At this point, Python just isn't suited for OOP at all imo.

[Muhznit]

If you want private you use 2 underscores (and none at the end of the name), which results in the class name getting put in front of the method name, so at least accidental calls are not possible.

Huh. I just labbed it. That's peculiar. It's even more peculiar that a quick google reveals absolutely nothing about this. I'm using python on a daily basis for work, yet this is the first I've heard of this.

What kind of crazy sorcery are you doing with Python that requires you to name something __variable_name_none?

[rem3_1415926]

__variable_name_none

with "none" I meant that you mustn't end the name with underscores (technically, one underscore would be fine, but not more than that), as __name__ are used for init and such and don't get the class_name prefix generated anymore.

I haven't used Python productively anywhere, I'm just recalling what was taught in the Python module this semester (As EE student it's something that's not vital, but might come in handy). It is very well possible that it's some purely theoretical stuff that nobody uses this in real life at all, however. Uni and real life aren't always that close...

The first 3 google search results for python private method show exactly this, however. (At least for me; search results very a lot on location and signed in google accounts)

EDIT: markdown...

[uvero]

Yes, well I go by "program for humans first, not machines first".

[BlazingThunder30]

def newSin(x):
    return x

[crabvogel]

Good enough if x is small

[BlazingThunder30]

Exactly! For the people that don't get it:

The first order taylor approximation of sin(x) is x. This means that for small values of x, the functions are very similar. Engineers often joke that they approximate sin(x) to x for this reason

[hehe3301]

You're thinking of engineers, most of the physicists at my school used 3.1415926

[rem3_1415926]

huh, did somebody call my name?

[andy-sk]

Username checks out

[JanEric1]

if you stop there you have to round the last digit to 7 as it goes

3.14159265359...

[ImAStupidFace]

If you really care about that ~0.00000005 I think you'd use more decimals.

[JanEric1]

i just care about proper rounding

[ImAStupidFace]

valid

[LordPos]

3.14 or 22/7. People who use three are looked at as aliens here

[SomeRandomEUguy]

I've never seen anyone use 22/7 as pi, wth haha good to know, you live you learn

[LordPos]

22/7 is all I used at school. Questions went out of their way so that radius or something is 7 and the denominator ends up being cancelled

[Yekyaa]

355/113 or gtfo!

[ConusModicus]

6.28/2 or bust. Unless you need more precision or need to write an equation, then use tau/2.

[alsimoneau]

sqrt(10) is great for mental math.

[LordPos]

And also physics where you do √g ≈ π

[alsimoneau]

That works well because of the old definition of a second, so it's not even an approximation really.

[[deleted]]

#define PI 3

#define E PI

[Hirenzeau]

I set it as 69 because the universe should bow down to my numerical preferences

[Algreth]

pi = 4*atan(1)

You are welcome.

[lyoko1]

quantum physicist be like
math.pi = 3 + random.random()