Programming thread

[Belisarius Cawl]

on the other hand "cute" in a nice way is overloading the / for filesystem::path in C++, i found that pretty amusing when i first saw it

Python's pathlib does the same thing:

https://realpython.com/python-pathlib/

I'm in favor of operator overloading because judicious use of it as here can enhance readability significantly

 

[Anti Snigger]

on the other hand "cute" in a nice way is overloading the / for filesystem::path in C++, i found that pretty amusing when i first saw it

for the most cursed operator overloading candidate i submit muti dimensional analog literals

After using pathlib.Path in python, I see zero reason why / shouldn't have that behavior for strings by default

 

[Creative Username]

the real based languages solve the operator overloading issue by just not having any operators

 

[Anti Snigger]

the real based languages solve the operator overloading issue by just not having any operators

True, this is why java is the best language, saars

 

[Polyarmory]

True, this is why java is the best language, saars

What are you talking about? What gave you the impression that Java doesn't have operators?

 

[Belisarius Cawl]

After using pathlib.Path in python, I see zero reason why / shouldn't have that behavior for strings by default

Because it strongly suggests paths as mentioned earlier. For what you're talking about, we have + (though a real gangsta will opt for f-strings or other more readable options).

 

[Anti Snigger]

Because it strongly suggests paths as mentioned earlier. For what you're talking about, we have + (though a real gangsta will opt for f-strings or other more readable options).

Do not do this

 

[Belisarius Cawl]

Do not do this

Why not use f-strings and the like?

 

[Anti Snigger]

Why not use f-strings and the like?

Why would I want to roll my own platform independent path utility and file system management class, when pathlib is in the standard library and well supported by third party libraries?
Pathlib isn't just for path formatting, it's hooked into shutil2, os, sys, and is supported by the fsspec people
I could roll my own, but there's no reason to

 

[Belisarius Cawl]

Why would I want to roll my own platform independent path utility and file system management class, when pathlib is in the standard library and well supported by third party libraries?
Pathlib isn't just for path formatting, it's hooked into shutil2, os, sys, and is supported by the fsspec people
I could roll my own, but there's no reason to

I thought you meant for string formatting in general

 

[Anti Snigger]

I thought you meant for string formatting in general

Well, even for that, Path is nice because it's platform independent. They use OOP to abstract the path hierarchy, so code for one platform will function for another for manipulation. Hell, I can do p = Path.home() / '.my_app.d', and I'll get a valid path on any machine.

The Pure ones are ABCs, then in the __new__ method of Path, python delegates to the proper child class.
I know exactly how to do this, I just like having it be a first class feature I don't need to overthink outside of really bizarre situations with shit like fuse

 

[Belisarius Cawl]

Well, even for that, Path is nice because it's platform independent. They use OOP to abstract the path hierarchy, so code for one platform will function for another for manipulation. Hell, I can do p = Path.home() / '.my_app.d', and I'll get a valid path on any machine.
View attachment 7648748
The Pure ones are ABCs, then in the __new__ method of Path, python delegates to the proper child class.
I know exactly how to do this, I just like having it be a first class feature I don't need to overthink outside of really bizarre situations with shit like fuse

I'm familiar with it from an online GIS course I was using (too bad they never updated broken material)

 

[Anti Snigger]

I'm familiar with it from an online GIS course I was using (too bad they never updated broken material)

Paths when you're writing cross platform code are a pain in the ass, having something just werk on different OSes is incredibly nice. The Python Path class is incredible. Spidering a subtree is two lines of easily readable code that replaces about 20 lines using os. I actively refactored codebases at work to use pathlib. If I ever make an operating system, all paths are going to be null separated strings.

 

[Belisarius Cawl]

Paths when you're writing cross platform code are a pain in the ass, having something just werk on different OSes is incredibly nice. The Python Path class is incredible. Spidering a subtree is two lines of easily readable code that replaces about 20 lines using os.

What are these two lines? I assume spidering is some kind of exhaustive search of a directory?

 

[Anti Snigger]

What are these two lines? I assume spidering is some kind of exhaustive search of a directory?

Spidering is a BFS of the subtree, you use these a lot with searches or aggregations

 

[Belisarius Cawl]

Spidering is a BFS of the subtree, you use these a lot with searches or aggregations

Cool, what are the two lines

 

[Anti Snigger]

Cool, what are the two lines

Oh my bad, I thought you meant of what I wrote
It's something like this:

p: Path = ...
    
for cwd, subd, files in p.walk():
    ...

If you want to skip a subtree, you just mutate subd accordingly.

 

[Belisarius Cawl]

Oh my bad, I thought you meant of what I wrote
It's something like this:

p: Path = ...
    
for cwd, subd, files in p.walk():
    ...

If you want to skip a subtree, you just mutate subd accordingly.

I assume alphabetical order is preserved?

(Also Google's AI suggested a completely unnecessary use of deque from collections)

 

[Anti Snigger]

I assume alphabetical order is preserved?

I believe so, at least lexicographic.

(Also Google's AI suggested a completely unnecessary use of deque from collections)

Yeah, that would probably relate to Path.walk's cranky drunk grandpa, os.walk. They ultimately make the same syscalls, but Path is easier to read and less error prone. A file system path is an identifier for a node in a tree, I want to manipulate my path objects as if they were a tree, not doing string parsing.

 

[Belisarius Cawl]

I believe so, at least lexicographic.

That will serve well for my numerous directories mixing the Latin alphabet with Elder Futhark, Dingbats and Balinese music notation