Fix linting

Author: mikekryjak

src/boututils/View3D.py

@@ -322,8 +322,6 @@ def magnetic_field(g, X, Y, Z, rmin, rmax, zmin, zmax, Br, Bz, Btrz):
     bz = np.zeros(np.shape(X))
     bt = np.zeros(np.shape(X))
 
-    nx, ny, nz = np.shape(X)
-
     mask = (rho >= rmin) & (rho <= rmax) & (Z >= zmin) & (Z <= zmax)
     k = np.argwhere(mask is True)
 
@@ -361,8 +359,6 @@ def psi_field(g, X, Y, Z, rmin, rmax, zmin, zmax):
 
     psi = np.zeros(np.shape(X))
 
-    nx, ny, nz = np.shape(X)
-
     mask = (rho >= rmin) & (rho <= rmax) & (Z >= zmin) & (Z <= zmax)
     k = np.argwhere(mask is True)
 

src/boututils/datafile.py

@@ -523,7 +523,7 @@ def _bout_dimensions_from_var(self, data):
             return defdims_list[len(np.shape(data))]
 
         if bout_type == "string_t":
-            nt, string_length = data.shape
+            _, string_length = data.shape
             return ("t", f"char{string_length}")
         elif bout_type == "string":
             return (f"char{len(data)}",)