Update perturbIC.py

.coveragerc

@@ -0,0 +1,9 @@
+[run]
+branch = True
+
+# skip coverage testing for external source files
+omit = src/umfile_utils/_version.py
+
+[html]
+title = Coverage report: umfile_utils
+directory = coverage_html

.github/workflows/ unit_testing_umfile_utils.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches: main
+  pull_request:
+    branches: main
+  workflow_dispatch:
+
+jobs:
+
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Setup conda environment
+        uses: conda-incubator/setup-miniconda@v3
+        with:
+          miniconda-version: "latest"
+          python-version: ${{ matrix.python-version }}
+          environment-file: environment-dev.yml
+          auto-activate-base: false
+          activate-environment: umfile-utils-dev
+          auto-update-conda: false
+          show-channel-urls: true
+
+      - name: Install source
+        shell: bash -l {0}
+        run:  python -m pip install --no-deps --no-build-isolation -e .
+
+      - name: List installed packages
+        shell: bash -l {0}
+        run: conda list
+
+      - name: Run tests
+        shell: bash -l {0}
+        run: python -m pytest --cov=src --cov-report=html -s tests
+

.gitignore

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+**/__pycache__/
+*.pyc
+.hypothesis/
+.*_cache/
+.vscode/
+.DS_Store
+.idea
+.coverage
+*~
+*.egg-info
+coverage_html
+*.code-workspace

LICENSE

@@ -0,0 +1,201 @@
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environment-dev.yml

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+name: umfile-utils-dev
+channels:
+  - accessnri
+  - conda-forge
+  - coecms
+  - nodefaults
+dependencies:
+  - python >=3.10
+  - pytest
+  - xarray
+  - mule
+  - numpy < 2
+  - versioneer
+  - hypothesis
+  - ipykernel
+  - pytest-cov
+  - pip
+

pyproject.toml

@@ -0,0 +1,43 @@
+[project]
+name = "umfile-utils"
+dynamic = ["version"]
+authors = [
+  {name = "Martin Dix", email="[email protected]"},
+  {name = "Lindsey Oberhelman", email="[email protected]"},
+  {name = "Davide Marchegiani", email="[email protected]"},
+]
+description = "Collection of tools for UM fieldsfiles."
+license = { file = "LICENSE" }
+keywords = ["UM", "UM utilities", "UM fields files", "umfile_utils"]
+requires-python = ">=3.10"
+dependencies = [
+    "mule",
+    "numpy <2",
+    "versioneer",
+]
+
+[project.urls]
+Repository = "https://github.com/ACCESS-NRI/umfile_utils"
+
+[build-system]
+build-backend = "setuptools.build_meta"
+requires = [
+    "setuptools>64", 
+    "versioneer[toml]"
+]
+
+[tool.setuptools.packages.find]
+where = ["src"]
+namespaces = false
+
+[tool.versioneer]
+VCS = "git"
+style = "pep440"
+versionfile_source = "src/umfile_utils/_version.py"
+versionfile_build = "umfile_utils/_version.py"
+tag_prefix = ""
+parentdir_prefix = "umfile-utils-"
+
+[tool.pytest.ini_options]
+pythonpath = "src"
+addopts = "--cov=src --cov-report=term-missing"

setup.py

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+import versioneer
+from setuptools import setup
+
+setup(
+    version=versioneer.get_version(),
+    cmdclass=versioneer.get_cmdclass(),
+)