Cleanup of imports and checking using pylint

tools/plot_antenna_params.py

@@ -20,10 +20,9 @@ import argparse
 from pathlib import Path
 
 import h5py
-import numpy as np
-import matplotlib.pyplot as plt
 import matplotlib.gridspec as gridspec
-
+import matplotlib.pyplot as plt
+import numpy as np
 from gprMax.exceptions import CmdInputError
 
 
@@ -412,10 +411,10 @@ def mpl_plot(filename, time, freqs, Vinc, Vincp, Iinc, Iincp, Vref, Vrefp, Iref,
     # ax.grid(which='both', axis='both', linestyle='-.')
 
     # Save a PDF/PNG of the figure
-    savename1 = file.stem + '_tl_params'
-    savename1 = file.parent / savename1
-    savename2 = file.stem + '_ant_params'
-    savename2 = file.parent / savename2
+    savename1 = filename.stem + '_tl_params'
+    savename1 = filename.parent / savename1
+    savename2 = filename.stem + '_ant_params'
+    savename2 = filename.parent / savename2
     # fig1.savefig(savename1.with_suffix('.png'), dpi=150, format='png',
     #              bbox_inches='tight', pad_inches=0.1)
     # fig2.savefig(savename2.with_suffix('.png'), dpi=150, format='png',