[Python-ideas] Another pathlib suggestion

[Antony Lee]

After some more thought, a better API may be to provide a "with_suffixes"
method, such that "p.with_suffixes(*s).suffixes == s" (just like
"p.with_suffix(s) == s").
For example, we'd have
    Path("foo.tar.gz").with_suffixes(".ext") == Path("foo.ext")
    Path("foo.ext").with_suffixes(".tar", ".gz") == Path("foo.tar.gz")

I guess this is a less popular topic than discussing new empty set literals
though :) but if you really like Unicode, you could just use
https://github.com/ehamberg/vim-cute-python

Antony


2014-05-21 13:38 GMT-07:00 Antony Lee <antony.lee at berkeley.edu>:

> Handling of Paths with multiple extensions is currently not so easy with
> pathlib.  Specifically, I don't think there is an easy way to go from
> "foo.tar.gz" to "foo.ext", because Path.with_suffix only replaces the last
> suffix.
>
> I would therefore like to suggest either
>
> 1/ add Path.replace_suffix, such that
>     Path("foo.tar.gz").replace_suffix(".tar.gz", ".ext") == Path("foo.ext")
> (this would also provide extension-checking capabilities, raising
> ValueError if the first argument is not a valid suffix of the initial
> path); or
>
> 2/ add a second argument to Path.with_suffix, "n_to_strip" (although
> perhaps with a better name), defaulting to 1, such that
>     Path("foo.tar.gz").with_suffix(".ext", 0) == Path("foo.tar.gz.ext")
>     Path("foo.tar.gz").with_suffix(".ext", 1) == Path("foo.tar.ext")
>     Path("foo.tar.gz").with_suffix(".ext", 2) == Path("foo.ext") # set
> n_to_strip to len(path.suffixes) for stripping all of them.
>     Path("foo.tar.gz").with_suffix(".ext", 3) raises a ValueError.
>
> Best,
> Antony
>
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