Copy between different filesystems

[Nintorac]

Hi, great project :)

I am trying to copy between filesystems, I see that #227 exists, that will be amazing when it comes!

In the meantime I would still like to copy between filesystems, I wrote some code like this,

source_uri = UPath('some_file')
target_uri = UPath('s3://test/some_file')
with (source_uri.open('rb') as source,
     target_uri.open('wb') as target):
    target.write(source)

but get the error TypeError: a bytes-like object is required, not '_io.BufferedReader..since target.write seemingly should accept a readable buffer I am not sure why the error here.

The workaround I have come up with looks like this, feel kind of wrong to implement it in python loop though.

with (source_uri.open('rb') as source,
        target_uri.open('wb') as target):
    while x:=source.read(target_uri.fs.blocksize):
        target.write(x)

Is there something obviously wrong with my initial implementation or is there a better approach for the workaround?

Cheers!