Added a pre-commit config file and reformatted all the files accordingly by using it.

examples/subgrids/cylinder_fs.py

@@ -2,10 +2,10 @@
 
 This example model demonstrates how to use subgrids at a basic level.
 
-The geometry is 3D (required for any use of subgrids) and is of a water-filled 
+The geometry is 3D (required for any use of subgrids) and is of a water-filled
 cylindrical object in freespace. The subgrid encloses the cylinderical object
-using a fine spatial discretisation (1mm), and a courser spatial discretisation 
-(5mm) is used in the rest of the model (main grid). A simple Hertzian dipole 
+using a fine spatial discretisation (1mm), and a courser spatial discretisation
+(5mm) is used in the rest of the model (main grid). A simple Hertzian dipole
 source is used with a waveform shaped as the first derivative of a gaussian.
 """
 
@@ -39,9 +39,8 @@ dxdydz = gprMax.Discretisation(p1=(dl, dl, dl))
 domain = gprMax.Domain(p1=(x, y, z))
 time_window = gprMax.TimeWindow(time=tw)
 
-wf = gprMax.Waveform(wave_type='gaussiandot', amp=1, freq=1.5e9, id='mypulse')
-hd = gprMax.HertzianDipole(polarisation='z', p1=(0.205, 0.400, 0.250),
-                           waveform_id='mypulse')
+wf = gprMax.Waveform(wave_type="gaussiandot", amp=1, freq=1.5e9, id="mypulse")
+hd = gprMax.HertzianDipole(polarisation="z", p1=(0.205, 0.400, 0.250), waveform_id="mypulse")
 rx = gprMax.Rx(p1=(0.245, 0.400, 0.250))
 
 scene.add(title)
@@ -60,36 +59,40 @@ sg1 = (c1[0] - r, c1[1] - r, c1[2])
 sg2 = (c2[0] + r, c2[1] + r, c2[2])
 
 # Create subgrid
-subgrid = gprMax.SubGridHSG(p1=sg1, p2=sg2, ratio=ratio, id='sg')
+subgrid = gprMax.SubGridHSG(p1=sg1, p2=sg2, ratio=ratio, id="sg")
 scene.add(subgrid)
 
 # Create water material
 eri, er, tau, sig = calculate_water_properties()
-water = gprMax.Material(er=eri, se=sig, mr=1, sm=0, id='water')
+water = gprMax.Material(er=eri, se=sig, mr=1, sm=0, id="water")
 subgrid.add(water)
-water = gprMax.AddDebyeDispersion(poles=1, er_delta=[er - eri], tau=[tau], material_ids=['water'])
+water = gprMax.AddDebyeDispersion(poles=1, er_delta=[er - eri], tau=[tau], material_ids=["water"])
 subgrid.add(water)
 
 # Add cylinder to subgrid
-cylinder = gprMax.Cylinder(p1=c1, p2=c2, r=r, material_id='water')
+cylinder = gprMax.Cylinder(p1=c1, p2=c2, r=r, material_id="water")
 subgrid.add(cylinder)
 
 # Create some geometry views for both subgrid and main grid
-gvsg = gprMax.GeometryView(p1=sg1, p2=sg2, dl=(dl_sg, dl_sg, dl_sg),
-                           filename=fn.with_suffix('').parts[-1] + '_sg',
-                           output_type='n')
+gvsg = gprMax.GeometryView(
+    p1=sg1, p2=sg2, dl=(dl_sg, dl_sg, dl_sg), filename=fn.with_suffix("").parts[-1] + "_sg", output_type="n"
+)
 subgrid.add(gvsg)
 
-gv1 = gprMax.GeometryView(p1=(0, 0, 0), p2=(x, y, z), dl=(dl, dl, dl),
-                          filename=fn.with_suffix('').parts[-1],
-                          output_type='n')
+gv1 = gprMax.GeometryView(
+    p1=(0, 0, 0), p2=(x, y, z), dl=(dl, dl, dl), filename=fn.with_suffix("").parts[-1], output_type="n"
+)
 scene.add(gv1)
 
 # Create some snapshots of entire domain
 for i in range(5):
-    s = gprMax.Snapshot(p1=(0, 0, 0), p2=(x, y, z), dl=(dl, dl, dl),
-                        time=(i + 0.5) * 1e-9,
-                        filename=fn.with_suffix('').parts[-1] + '_' + str(i + 1))
+    s = gprMax.Snapshot(
+        p1=(0, 0, 0),
+        p2=(x, y, z),
+        dl=(dl, dl, dl),
+        time=(i + 0.5) * 1e-9,
+        filename=fn.with_suffix("").parts[-1] + "_" + str(i + 1),
+    )
     scene.add(s)
 
 gprMax.run(scenes=[scene], n=1, geometry_only=False, outputfile=fn, subgrid=True, autotranslate=True)