ba_plot: follow pylint style advice

Wrap/Python/ba_plot.py

@@ -24,7 +24,7 @@ except Exception as e:
 label_fontsize = 16
 
 # default values from environment variables
-CMAP = "CMAP" in os.environ and os.environ["CMAP"] or 'inferno'
+CMAP = os.environ['CMAP'] if 'CMAP' in os.environ else 'inferno'
 NOSHOW = "NOSHOW" in os.environ
 
 
@@ -68,8 +68,7 @@ def translate_axis_label(label):
     }
     if label in label_dict.keys():
         return label_dict[label]
-    else:
-        return label
+    return label
 
 
 def get_axes_labels(result, units):
@@ -139,9 +138,9 @@ def plot_histogram(hist, **kwargs):
     :param zmax: Max value on amplitude's color bar
     """
 
-    if not 'xlabel' in kwargs:
+    if 'xlabel' not in kwargs:
         kwargs['xlabel'] = translate_axis_label(hist.xAxis().axisName())
-    if not 'ylabel' in kwargs:
+    if 'ylabel' not in kwargs:
         kwargs['ylabel'] = translate_axis_label(hist.yAxis().axisName())
 
     axes_limits = [
@@ -171,9 +170,9 @@ def plot_colormap(result, **kwargs):
     axes_limits = get_axes_limits(result, units)
     axes_labels = get_axes_labels(result, units)
 
-    if not 'xlabel' in kwargs:
+    if 'xlabel' not in kwargs:
         kwargs['xlabel'] = axes_labels[0]
-    if not 'ylabel' in kwargs:
+    if 'ylabel' not in kwargs:
         kwargs['ylabel'] = axes_labels[1]
 
     return plot_array(result.array(), axes_limits=axes_limits, **kwargs)
@@ -230,7 +229,7 @@ def plot_simulation_result(result, **kwargs):
     else:
         plot_colormap(result, **kwargs)
     plt.tight_layout()
-    if not (noshow):
+    if not noshow:
         plt.show()
     else:
         print("plot_simulation_result: noshow")