add optional shading of "normal" work hours

email_stats.py

@@ -39,6 +39,10 @@ parser.add_argument('--title', '-t', default='',
 parser.add_argument('--sendercolors', '-s', default=False, action='store',
                     help='Comma separated list of search strings for the \
 sender field. Each will be displayed with a different color.')
+parser.add_argument('--work_hours', action='store',
+                    default=None,
+                    help='If provided, shade work hours. Comma-separated \
+list.')
 parser.add_argument('--domains', '-d', action='store',
                     default='gmail,hotmail,aol,comcast,yahoo',
                     help='Comma separated list of domains to use in \
@@ -121,7 +125,7 @@ if len(pldata['unknown']) > 0:
                  color=viridis(1),
                  marker='.',
                  #tz=z.tzname(),
-                 label='unknown',
+                 label=None,
                  alpha=0.3,
                  xdate=True)
 
@@ -131,6 +135,17 @@ if args.sendercolors:
 ax.tick_params(axis='x',
                labelrotation=90)
 
+if args.work_hours:
+    work = [float(x) for x in args.work_hours.split(',')]
+    ax.fill_between(ax.get_xlim(),
+                    y1=work[0],
+                    y2=work[1],
+                    color='gray',
+                    alpha=0.3,
+                    label='Work Hours')
+    ax.legend(loc='best',
+              fontsize='small')
+
 if args.plotroot:
     fig.savefig(args.plotroot + '-send_times.png',
                 bbox_inches='tight')