Replace pkg_resources.resource_string with `importlib.resources.fil…

…es` [all tests ci] (#1468)

* replace pkg_resources with importlib.resources

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* remove unused pkg_resources import

* update __name__ to __package__ and use read_text

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* remove unused pkg_resources again

* update whats new

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/source/whats-new.md

@@ -19,6 +19,7 @@ This release includes the critical migration to use the new `xr.DataTree` functi
 ## Bug and warning fixes
 * Assemble AD2CP timestamp with nanosecond precision by @leewujung in /~https://github.com/OSOceanAcoustics/echopype/pull/1436
 * Use `import_resources.files` instead of the legacy `open_text` by @leewujung in /~https://github.com/OSOceanAcoustics/echopype/pull/1434
+* Replace `pkg_resources.resource_string` with `importlib.resources.files` by @leewujung in /~https://github.com/OSOceanAcoustics/echopype/pull/1468
 * Fix invalid `\d` warning by using raw string by @leewujung in /~https://github.com/OSOceanAcoustics/echopype/pull/1448
 * Check if there exist any swap files before cleaning them up by @ctuguinay in /~https://github.com/OSOceanAcoustics/echopype/pull/1451
 * Remove `__setattr__` from EchoData by @leewujung in /~https://github.com/OSOceanAcoustics/echopype/pull/1457

echopype/echodata/widgets/widgets.py

@@ -1,9 +1,9 @@
 import datetime
 import html
 from functools import lru_cache
+from importlib.resources import files
 from pathlib import Path
 
-import pkg_resources
 from jinja2 import Environment, FileSystemLoader, Template
 from jinja2.exceptions import TemplateNotFound
 
@@ -36,7 +36,7 @@ def _load_static_files():
     """Lazily load the resource files into memory the first time they are needed.
     Clone from xarray.core.formatted_html_template.
     """
-    return [pkg_resources.resource_string(__name__, fname).decode("utf8") for fname in STATIC_FILES]
+    return [files(__package__).joinpath(fname).read_text(encoding="utf8") for fname in STATIC_FILES]
 
 
 def get_environment() -> Environment: