Change to have_matplotlib.

pyqso/logbook.py

@@ -29,11 +29,11 @@ try:
    from matplotlib.backends.backend_gtk3cairo import FigureCanvasGTK3Cairo as FigureCanvas
    from matplotlib.figure import Figure
    from matplotlib.dates import DateFormatter, MonthLocator, DayLocator
-   have_necessary_modules = True
+   have_matplotlib = True
 except ImportError as e:
    logging.warning(e)
    logging.warning("Could not import matplotlib, so you will not be able to plot annual logbook statistics. Check that all the PyQSO dependencies are satisfied.")
-   have_necessary_modules = False
+   have_matplotlib = False
    
 from pyqso.adif import *
 from pyqso.log import *
@@ -296,7 +296,7 @@ class Logbook(Gtk.Notebook):
       have_config = (config.read(expanduser('~/.config/pyqso/preferences.ini')) != [])
       (section, option) = ("general", "show_yearly_statistics")
       if(have_config and config.has_option(section, option)):
-         if(config.get("general", "show_yearly_statistics") == "True" and have_necessary_modules):
+         if(config.get("general", "show_yearly_statistics") == "True" and have_matplotlib):
             hbox = Gtk.HBox()
             label = Gtk.Label("Display statistics for year: ", halign=Gtk.Align.START)
             hbox.pack_start(label, False, False, 6)