Allow python >=3.7 & small plotting fix

.github/workflows/regression.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
-        python-version: '3.8'
+        python-version: '3.7'
 
     - name: git version
       run: git --version
@@ -43,5 +43,5 @@ jobs:
       run: |
         # TODO the tests pickup omas from the python files in the directory not the installed version
         # so to make that work we run an editable install to create the omas_cython lib in the right place.
-        python3 -m pip install -e .
+        python3 -m pip install -e
         make test

omas/omas_plot.py

@@ -800,7 +800,7 @@ def get2d(contour_quantity):
             z = scipy.ndimage.zoom(z, sf)
             value_2d = scipy.ndimage.zoom(value_2d, sf)
 
-        cs = ax.contour(r, z, value_2d, levels, **kw)
+        cs = ax.contour(r, z, value_2d, levels=levels, **kw)
 
         if label_contours or ((label_contours is None) and (contour_quantity == 'q')):
             ax.clabel(cs)

pyproject.toml

@@ -30,7 +30,7 @@ classifiers = [
 ]
 keywords = ["integrated modeling",  "OMFIT", "IMAS",  "ITER"]
 
-requires-python = '>=3.8'
+requires-python = '>=3.7'
 dependencies = [
     'numpy>=1.16.1',
     'uncertainties',
@@ -44,7 +44,6 @@ dependencies = [
     'dnspython',
     'xmltodict',
     'xarray',
-    'setuptools>=41.2',
     'tqdm',
 ]
 readme="README.md"