Fixes per chapter revision

Author: alandmoore

Chapter07/ABQ_Data_Entry/abq_data_entry/models.py

@@ -100,9 +100,8 @@ def set(self, key, value):
 
   def save(self):
     """Save the current settings to the file"""
-    json_string = json.dumps(self.fields)
     with open(self.filepath, 'w') as fh:
-      fh.write(json_string)
+      json.dump(self.fields, fh)
 
   def load(self):
     """Load the settings from the file"""
@@ -113,7 +112,7 @@ def load(self):
 
     # open the file and read in the raw values
     with open(self.filepath, 'r') as fh:
-      raw_values = json.loads(fh.read())
+      raw_values = json.load(fh)
 
     # don't implicitly trust the raw values, but only get known keys
     for key in self.fields:

Chapter07/menu_demo.py

@@ -34,8 +34,8 @@
 # Add the appearance menu #
 ###########################
 
-font_bold = tk.BooleanVar()
-font_size = tk.IntVar()
+font_bold = tk.BooleanVar(value=False)
+font_size = tk.IntVar(value=10)
 
 def set_font(*args):
   size = font_size.get()
@@ -45,6 +45,8 @@ def set_font(*args):
 
 font_bold.trace_add('write', set_font)
 font_size.trace_add('write', set_font)
+set_font()
+
 
 # Create appearance menu
 appearance_menu = tk.Menu(main_menu, tearoff=False)