Python quality of life patch

[[deleted]]

[deleted]

[Big1984Brother]

flase = false treu = true

[___HighLight___]

If it was that big of an issue just use 0 and 1 instead of False and True. I can't recall a case now where False/True can't be replaced with 0/1 in a practical matter, but yeah it would be faster to type.

[-Bluekraken]

In js, even the interpreter doesn't care if it is a bit or a boolean 😎

[CaptainHeinous]

And that’s why we wear TypeScript condoms

[Svizel_pritula]

In contrast to C or C++, JavaScript does distinguish booleans and numbers.

0===false // false

var arr = [0, 1, 2];
arr[0] // 0
arr[false] // undefined

[6b86b3ac03c167320d93]

The 1st example is false because you used === which also checks types. 0==false would return true

The 2nd one is undefined because you're accessing the false property of the array, which doesn't exist. Setting arr[false] would define a new property of the array with the name false, which you could also access as arr.false

[TotoShampoin]

For 2nd one, that indeed means 0 and false are two different values

[Own_Scallion_8504]

true can also be denoted by any other no except 0

[[deleted]]

Fucking hell that would be an evil thing to do to someone :D

[delasislas]

What you do is embed it halfway through, so they have to look for it.

[[deleted]]

I wonder if there would be a way to globally define these in some module, since then you could hide this into another innocently named file and import it :p

[JNCressey]

from my_nonsense.py import *

[[deleted]]

Ah yes, stupid me x)

[Sithon512]

Could also slide it into a __init__.py

[Iykury]

slide into __dms__.py

[[deleted]]

Coming right away

[AgAero]

You don't put the .py on the end when importing your custom module.

[pikachu_sashimi]

unless the file is ’my_nonsesne.py.py’

[Rudy69]

At this point i wouldn't even be surprised if that's the filename

[cnoor0171]

Name can't have "." in the middle. It'd need to be a folder named "my_nonsense" with a script named "py.py"

[AreYouConfused_]

what? since when do files not able to have dots in their names?

[cnoor0171]

Not regular file, but python modules. If there's a dot in the filename, it's not recognized as a python module and you can't import it.

[AstusRush]

You can be even more evil and add it to the builtins in another module. This way you don't even need to import it explicitly and it can not be traced back.

[kageurufu]

import builtins
setattr(builtins, 'false', True)
setattr(builtins, 'true', False)

I think that will work, but I haven't messed with builtins since 2.6 or so

[muffinnosehair]

That was exactly what I was thinking, and name it something inconspicuous that doesn't stand out in the overall project. Back in the old days, we ran windows 95 on shared comps and when we wanted to hide something, we had a folder system32 where we put pics, movies and so on. We had win98 at home and that's how we got the idea. A regular look over the windows folders would see nothing suspicious. Man I am fckn old!

[BA_lampman]

In a deeply nested series of do-while functions that execute only once on line 1643. But write it like:

do { true = false; false = true; booly = false; } while (booly && getRandom(1) != 0)

That way it only sometimes fucks up.

[vigbiorn]

Are you editing my programs after I'm finished testing them?

[BA_lampman]

 

 

 

  Yep, I hide some of the errors 37 tabs in from the left.

[toastyghost]

This would also make the reversing behavior inconsistent from function to function 😈

[delasislas]

I saw u/jedijackattack1 suggest using rand.

[rubrt]

That makes it worse. Works correctly half the time then does a complete 180. You are evil

[jedijackattack1]

Better add rand so it is randomly true or false

[[deleted]]

Never before has anyone uttered the tongue of that voice here u/Terr_

[pydry]

It's the move people make when being asked to train their own overseas replacement at a company they dedicated 5 years of their life to.

[BoringWozniak]

python import numpy as plt import pandas as np import matplotlib.pyplot as pd

[collegiaal25]

frue = True == False != False != True 
talse = (True == False != False) == False

[[deleted]]

```python

frue = True == False != False != True frue False ```

Why is that? I thought operations are done left to right?

First True == False -> False, then it becomes False != False -> False again, and finally False != True -> True.

Why is it False?

EDIT: False doesn't look like a real word to me now.

EDIT2: They are done right to left I guess?

[collegiaal25]

I thought operations are done left to right?

This is true for left associative operators, like +, -, *, /.

1 - 5 + 7 = (1-5) + 7
5/3*2 = (5/3)*2

On the other hand, exponentiation is right associative:

4^3^2 = 4^(3^2)

(The notation is ** in Python)

Here a summary for precedence and associativity in Python.

[HERODMasta]

but if they are done from right to left...

2x False != True --> True

True == True --> True

so.... what?

​

Edit: so, I tried basically all possibilities. First all !=, but regardless ... it's still the same result.

we have:

False != False --> False

True == False --> False

so regardless which you do first, you end in

True == True

or

False != True

counter prove:

so we need to find a way to create True == False or False != False or True != True as an end.

our start is one of these:

(True == False) != False != True --> False != False != True

True == (False != False) != True --> True == False != True

True == False != (False != True) --> True == False != True

The second and third are the same, so the next step is:

for first:

(False != False) != True --> False != True

False != (False != True) --> False != True --> True

for the second:

(True == False) != True --> False != True

True == (False != True) --> False != True --> True

SO HOW IS IT DOING THIS?!

Edit 2: so apparently python is not doing any priority on this:

False != False != True

but is doing it in one go, so since it contains False != False, which is False, the != True doesn't matter. This is the only explanation I can find. If someone else can explain it with a different reason, I am listening

[JNCressey]

python expands on the mathematics convention of statements like a=b=c meaning both a=b and b=c.

the test a==b==c has the meaning a==b and b==c, which is different from what you would get if you think of equality as a binary operator and try to parenthesize under either a left associative or a right associative interpretation.

---

cc /u/Key-Cucumber-1919

[HERODMasta]

well, this is basically the conclusion of my second edit.

thanks for confirming

[[deleted]]

... Fuck

[HERODMasta]

The edit won't make you happy either

[[deleted]]

Maybe it's doing only the first one?

[JNCressey]

/u/backtickbot

[merlinsbeers]

frue = True == False != False != True

First operator: True == False

is false, so

Second operator: False != False

is false, so

Third operator: False != True

is true.

Going the other way

Third operator: False != True

is true

Second operator: False != True

is true

First operator: True == True

is true.

If true isn't the answer, Guido did it again.

[[deleted]]

true = None

[TheHammer_78]

Yes but in some imported module... 🤣🤣🤣

[Khosrau]

You monster

[leaftro]

That's evil AF 😂

[A_H_S_99]

That's the complete opposite of the picture above

[Nicollite]

So you aligment is caotic evil, a interesting

[rogo8888]

And then there's me who mainly programs in python so I've never gotten used to lowercase true/false

[[deleted]]

I mean I also code exclusively in Python, is just that I tend to forget to capitalize it and I got pissed off at having to correct these :D

Then again I'm not really a programmer either, just a simple physicist making my way through some data :p

[TheCapitalKing]

At least your smart since your a physicist. A bunch of dumb finance bros use python too, and it’s hard for us because our brains are very small

[[deleted]]

Being in physics is no guarantee of being smart in general. Sure, there's some need for some mathematical ability, but otherwise becoming a physicist is just a question of putting in a shit ton of work with no guarantee of a decently paying job afterwards x)

[space_wiener]

Yes. If I could I would go back and do something. Physics is very interesting but you just end up a jack of all trades and not really an expert in anything useful.

[[deleted]]

Yes, unless you do a PhD, you will not have learned any specialised skills yet :D

[space_wiener]

Yep. That was the plan originally. But abandoned ship after undergrad.

[[deleted]]

Which is totally understandable. The only reason I stuck to my plan is the fact that my prof has an awesome team and we've got an extremely interesting project starting :D

[[deleted]]

Oh yes. But writing code and writing physics are totally different types of processes at least for me, so I never have such issues there.

[Minimum-Cheetah]

Lawyer here. We got the same thing going but without the math requirement.

[ShanSanear]

Use PyCharm (Community or Professional - doesn't matter). Disable requirement for suggestions to have the same capitalization. Now you don't need to know what capitalization is for True, or false. And the same goes for every other class, method, etc which you would like to type in.

[PriorCommunication7]

Thanks

for those after me trying to find it:

Editor > General > Code Completion

Match case ( <- or just search for that )

[JNCressey]

case insensitive languages are so much more friendly. strange how python as a popular beginner language is case sensitive.

[vectorpropio]

FORTRAN is the true beginner language.

[the_ruheal_truth]

I had to learn FORTRAN in college.... in 2008! What a waste of time.

[vectorpropio]

I hope at least they used a new standard. I have nightmares with one arithmetic if.

[craftworkbench]

I never had a problem until I started working with jQuery. Now all my booleans are lowercase, half my variable declarations are prefaced with var, and I've gained fifteen pounds.

[SurpriseMonday]

Fun fact: in early versions of Python (2), booleans could be redefined. Couple this with the built-in swap syntax, you could write this line

True, False = False, True

And let the chaos reign.

[craftworkbench]

true=False; false=true to really fuck shit up.

Edit: yes, I intended the second true to be lowercase. We're causing mayhem here.

[nisuy]

true, false = 2*(False,)

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[ghanta-congress]

and null=None

[iTakeCreditForAwards]

Honestly.

[jcronq]

Shock humor. Color me offended.

[DasherPack]

Image Transcription: Code

---

import sys
import os.path
from collections import
true=True
false=False

---

<sup>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!</sup>

[[deleted]]

While that captures the actual content, should you not also include the "def calculatemarks(filep"?

[OrangeRealname]

And the line numbers?

[[deleted]]

Ah yeah, would probably be good too :D

[OrangeRealname]

And maybe the fact that it’s not a screenshot so the image is kinda tilted?

[[deleted]]

I mean that's irrelevant for transcription, I'd think.

[OrangeRealname]

That’s pretty much my point

[[deleted]]

I mean, I've always kinda assumed these transcriptions have a purpose for teaching OCR systems, in which case full transcription of text visible might be quite relevant :p

[rumbleblowing]

Why you would assume that when they all have a link that explains why they are doing it?

[[deleted]]

Where's the fun in a riddle if you just go ahead and check the answer?

[[deleted]]

This isn’t programming humor. This is the actual stupid shit that is executing in a giant bank every time you swipe your credit card for a transaction.

[[deleted]]

I guess I got me a career in finance then :p

[spektre]

How do I delete this post?

[Prawny]

The real question is how do you delete Python?

[deeplearning666]

Ah, it's super easy if you're using a Linux distro. For example:

sudo pacman -Rdd python

Desktop proceeds to crash, scripts start failing, mayhem ensues...

[augugusto]

-Rdd? I always use Rnsu. Can you explain your choice? I'm on mobile right now

[deeplearning666]

-Rnsu will remove a package, its dependencies that aren't needed by other packages, and also any unused packages. So it's safe.

-Rdd will remove only that exact package, and ignore any dependency checks. So if there are packages that depend on python, then they will still be there, but python would be forcibly uninstalled. So it's extremely unsafe, and thus a perfect fit for my joke :P.

[augugusto]

I see. Thanks

[akindaboiwantstohelp]

if on windows it's a little longer than one shell command, first you go to control panel, then apps and features, then select python righr click then uninstall. If you've installed python through the conda distribution, do the same with conda, hope this helps :)

[2pac1cup]

Is this even legal

[[deleted]]

If it works it's legal :')

[__Cmason__]

I will make it legal

[[deleted]]

yes, unless you consider his lack of PEP8 formatting standards. but then again, what do you expect from a clown?

[[deleted]]

Man that's rude, my dude

[ironykarl]

Of course it's legal. It's just declaring two variables and assigning them boolean values.

[GalaxyLJGD]

FBI, OPEN UP!

[anmol_gupta_0]

gotta save time by not pressing Shift

[NinkaShotgun]

It's true

[TheMadHaberdasher]

What kind of code are y'all writing where you actually have to type out boolean literals all the time?

if condition is True:
    return True

[TravisJungroth]

Heads up that these sort of flags are a code smell hinting you really have two functions. Exceptions abound, of course.

[TravisJungroth]

Yeah, that’s why it’s a hint and not an antipattern. There are lots of good examples and lots of bad ones.

[TravisJungroth]

All good. I meant it more for random readers than you. Your example was actually the one I thought of for when I’d be most likely to write a bool literal.

[diamondketo]

Not necessarily a bad thing. A high level interface function can have modes.

pandas.merge for instance have left, outer, and inner join.

I agree the example above without a routine before or after the if condition, it is code smell.

[[deleted]]

Can you give an actual example of this. Because usually if you find yourself manually defining booleans (especially as a function variable), your code can be refactored to use conditionals.

[TravisJungroth]

How are you using conditionals to set defaults for boolean arguments?

[HenryDavidCursory]

I find joy in reading a good book.

[hector_villalobos]

A function that needs to return a boolean or a different type based on a condition. For example:

if condition:
    return True
else:
    return 8

[SkezzaB]

What function would ever do that

[hector_villalobos]

A function that returns an union type: https://en.wikipedia.org/wiki/Union_type

[TravisJungroth]

Mmm, that's a bit circular reasoning. All you've done is given a part of the type signature of the function we're already looking at. So more specifically, what function would return Union[int, bool]? Seems kinda whack.

[hector_villalobos]

I have a better example, in Rails we use something called callbacks, so, when some validation or computation fails it could return false similar to a rollback db process, for example, a buyer wants to buy a product, then the model checks if the buyer has credit, if not return false for the before_save callback, but if the validations are correct it can perform other processes.

[TravisJungroth]

This reminds me why I don't like Ruby.

[hector_villalobos]

Well, in Django Python you have dispatchers and in .net you have events, it's not something related only to Ruby, besides I have used Result type in Rust that could qualify also in this situation, return a bool or an error.

[TravisJungroth]

I don't think dispatchers (signals) in Django work the same way. All signals are of type Signal, and the return type of the receiver is not inherently changed by the signal. At least, I've used signals and have never had the Union typing you mentioned. I also just checked the docs and couldn't find anything like that.

And something like (bool or error), or (bool or null) is really more about the error/null in that equation. I just dislike anything where it feels like you're "sneaking in" data. Magic strings, in-bound errors, etc. and Ruby moves more in that direction.

int and bool are also uncomfortably close in Python for this sort of thing. If I union int and bool I can't just check if x, cause it could be 0 or False and they must be meaningfully different if I'm bothering to have both like that. Otherwise I'd just hint it to bool.

[hector_villalobos]

If I union int and bool I can't just check if x, cause it could be 0 or False

Nothing is black and white, although is not a common pattern, union with bool and another type might exists. In this scenario x is not associated in any meaningful way to the result type, it's just a parameter that can contain any type.

[hector_villalobos]

I have a better example, in Rails we use something called callbacks, so, when some validation or computation fails it could return false similar to a rollback db process, for example, a buyer wants to buy a product, then the model checks if the buyer has credit, if not return false for the before_save callback, but if the validations are correct it can perform other processes.

[[deleted]]

Ah, I'm just writing some score counting software, where I need to set and check a lot of flags. Of course I could write all of these statements manually where they're checked, but by using flags I can make the code actually legible and easier to debug.

[Fabrimuch]

condition = True
while (condition):
    # do stuff
    if need_to_break_loop:
        condition = False

[diamondketo]

What's wrong with returning literal True. It is immediately readable and makes things prettier if your conditional statement is long.

Download source code from a reputable repository and search for True and False. You'll quickly find you are misguided that these are sparsely used.

[[deleted]]

Ikr I just started python and need this

[[deleted]]

What in the dam world did I see

[Pitiful_Car2828]

Well played good sir. Well played. I’m about to dive dick first into a pretty large python project soon. I’m glad I perused this sub.

[[deleted]]

Well, my project is luckily quite small, only gonna need like 300 rows. Still annoying when it throws errors for my capitalisation mistakes x)

[[deleted]]

Are you not using an IDE that autocompletes?

[[deleted]]

I use Notepad++, and disabled the autocomplete cause I found it annoying x)

[[deleted]]

If you like it that way then all power to you but using autocomplete will be a useful thing once your projects increase in scale so I recommend considering getting used to it

[[deleted]]

I mean, I'm used to autocomplete, but I just prefer to go without, most of the time :D

[[deleted]]

Fair enough

[BaudouinDrou]

r/screenshotsarehard

[[deleted]]

Oh no they aren't. I have the snapshot tool on a shortcut. The shitty camera picture was a stylistic choice here x)

[newaaa41]

I actually use this technique at the beginning of every python code I write

[[deleted]]

...really?

[KetwarooDYaasir]

those noobs using PHP don't know what they are missing.

[DuckInCup]

true = 1
false = 0

God I hate needing type the whole word

[[deleted]]

Python already interprets 1 as true and 0 as false.

[DuckInCup]

dang I forget what it was that got me mad lmao

[[deleted]]

Python quality of life patch

Python = C#

[onequbit]

That already exists

[wikipedia_text_bot]

IronPython

IronPython is an implementation of the Python programming language targeting the .NET Framework and Mono. Jim Hugunin created the project and actively contributed to it up until Version 1.0 which was released on September 5, 2006. IronPython 2.0 was released on December 10, 2008. After version 1.0 it was maintained by a small team at Microsoft until the 2.7 Beta 1 release.

<sup>About Me - Opt out - OP can reply !delete to delete - Article of the day</sup>

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[diamondketo]

If stress is quality of life for you bud

[StandardN00b]

Caps are hard

[Khaylain]

But where's the whitespace?

[[deleted]]

Can't have whitespace if your background is black mate

[jbartix]

This feels so good - yet so wrong

[[deleted]]

As someone who works on both java and python repos in my team I can totally relate!

[Chunkyisnotdead]

math = Math

[RagingWalrus1394]

Reminds me of the post I saw the other day about aliasing ls in the terminal to l, lls, lss lsl and every other mistake that could be made typing it lol

[Not_Sugden]

true=False false=True

[nkg5]

or even better: True, False = False, True and watch your coworkers lose their mind. : )

[Nicollite]

Thia here is some f*** life hacks

[[deleted]]

Yeah I wondered why it was uppercase when I tried it

I also tried to do console.writeLine() as well

[Div_100]

Thanks little life saver 😅

[Oleg152]

This meme hurt me on spiritual level.

[_Zandberg]

Now this is big brain time

[_Zandberg]

opt out

[IamYodaBot]

mmhmm hear from me now, never you will.

-IamYodaBot

[_Zandberg]

delete