Replaced pkg_resources version parser with packager version parser. (#…

…5511)

* removed pkg_resources version parse references

* Corrected pull num

* Fix What's New indentation

* Fix What's New indentation.

---------

Co-authored-by: Martin Yeo <40734014+trexfeathers@users.noreply.github.com>

docs/src/whatsnew/latest.rst

@@ -84,8 +84,9 @@ This document explains the changes made to Iris for this release
    working properly. (Main pull request: :pull:`5437`, more detail:
    :pull:`5430`, :pull:`5431`, :pull:`5432`, :pull:`5434`, :pull:`5436`)
 
-#. `@acchamber`_ removed several warnings from iris related to Numpy 1.25 deprecations.
-   (:pull:`5493`)
+#. `@acchamber`_ and `@ESadek-MO`_ resolved several deprecation to reduce
+   number of warnings raised during tests.
+   (:pull:`5493`, :pull:`5511`)
 
 #. `@trexfeathers`_ replaced all uses of the ``logging.WARNING`` level, in
    favour of using Python warnings, following team agreement. (:pull:`5488`)

lib/iris/tests/unit/experimental/ugrid/mesh/test_Connectivity.py

@@ -14,7 +14,7 @@
 
 import numpy as np
 from numpy import ma
-from pkg_resources import parse_version
+from packaging import version
 
 from iris._lazy_data import as_lazy_data, is_lazy_data
 from iris.experimental.ugrid.mesh import Connectivity
@@ -63,7 +63,7 @@ def test_indices(self):
 
     def test_read_only(self):
         attributes = ("indices", "cf_role", "start_index", "location_axis")
-        if parse_version(python_version()) >= parse_version("3.11"):
+        if version.parse(python_version()) >= version.parse("3.11"):
             msg = "object has no setter"
         else:
             msg = "can't set attribute"

lib/iris/tests/unit/experimental/ugrid/mesh/test_MeshCoord.py

@@ -17,7 +17,7 @@
 
 import dask.array as da
 import numpy as np
-from pkg_resources import parse_version
+from packaging import version
 import pytest
 
 from iris._lazy_data import as_lazy_data, is_lazy_data
@@ -79,7 +79,7 @@ def setUp(self):
     def test_fixed_metadata(self):
         # Check that you cannot set any of these on an existing MeshCoord.
         meshcoord = self.meshcoord
-        if parse_version(python_version()) >= parse_version("3.11"):
+        if version.parse(python_version()) >= version.parse("3.11"):
             msg = "object has no setter"
         else:
             msg = "can't set attribute"