core: add ZipPath encapsulating compressed zip files (#227)

* core: add ZipPath encapsulating compressed zip files

this way you don't have to unpack it first and can work as if it's a 'virtual' directory

related: https://github.com/karlicoss/HPI/issues/20

tests/misc.py

@@ -1,56 +1,8 @@
-from pathlib import Path
-from subprocess import check_call
-import gzip
-import lzma
-import io
-import zipfile
-from typing import List
-
-from my.core.kompress import kopen, kexists, CPath
-
-
-def test_kopen(tmp_path: Path) -> None:
-    "Plaintext handled transparently"
-    assert kopen(tmp_path / 'file'   ).read() == 'just plaintext'
-    assert kopen(tmp_path / 'file.xz').read() == 'compressed text'
-
-    "For zips behaviour is a bit different (not sure about all this, tbh...)"
-    assert kopen(tmp_path / 'file.zip', 'path/in/archive').read() == 'data in zip'
-
-
-def test_kexists(tmp_path: Path) -> None:
-    assert     kexists(str(tmp_path / 'file.zip'), 'path/in/archive')
-    assert not kexists(str(tmp_path / 'file.zip'), 'path/notin/archive')
-
-    # TODO not sure about this?
-    assert not kexists(tmp_path / 'nosuchzip.zip', 'path/in/archive')
-
-
-def test_cpath(tmp_path: Path) -> None:
-    CPath(str(tmp_path / 'file'  )).read_text() == 'just plaintext'
-    CPath(    tmp_path / 'file.xz').read_text() == 'compressed text'
-    # TODO not sure about zip files??
-
-
-import pytest # type: ignore
-
-@pytest.fixture(autouse=True)
-def prepare(tmp_path: Path):
-    (tmp_path / 'file').write_text('just plaintext')
-    with (tmp_path / 'file.xz').open('wb') as f:
-        with lzma.open(f, 'w') as lzf:
-            lzf.write(b'compressed text')
-    with zipfile.ZipFile(tmp_path / 'file.zip', 'w') as zf:
-        zf.writestr('path/in/archive', 'data in zip')
-    try:
-        yield None
-    finally:
-        pass
-
-
 from typing import Iterable, List
 import warnings
 from my.core import warn_if_empty
+
+
 def test_warn_if_empty() -> None:
     @warn_if_empty
     def nonempty() -> Iterable[str]: