PEP 8 cleanup

tk_first_steps/feet.py

@@ -1,24 +1,26 @@
 from tkinter import *
 from tkinter import ttk
 
-status = 1 # 1 - neue Eingabe, 2 - Eingabe verarbeitet
+status = 1  # 1 - neue Eingabe, 2 - Eingabe verarbeitet
 
-def switch_status(newS: int = None):
+
+def switch_status(new_status: int = None):
     """ Verändert den globalen Status
 
-    :param newS: neuer Statuswert
+    :param new_status: neuer Statuswert
     :return: None
     """
     global status
-    if not newS:
+    if not new_status:
         if status == 1:
             status = 2
         else:
             status = 1
     else:
-        status = newS
+        status = new_status
     update_statusbar()
 
+
 def update_statusbar():
     """ Passt die Farbe der Statuszeile an den Status an.
 
@@ -32,6 +34,7 @@ def update_statusbar():
     else:
         frame_statusbar['style'] = 'bFrame.TFrame'
 
+
 def calculate(*args):
     """ Berechnet aus der eingegebenen Länge in feet die Länge in Metern.
 
@@ -40,7 +43,7 @@ def calculate(*args):
     """
     try:
         stringvalue = feet.get()
-        stringvalue = stringvalue.replace(",",".")
+        stringvalue = stringvalue.replace(",", ".")
         value = float(stringvalue)
         m_value = 0.3048 * value
         m_value = round(m_value, 2)
@@ -50,7 +53,8 @@ def calculate(*args):
         pass
     return True
 
-def check_entry(what : str = ""):
+
+def check_entry(what: str = ""):
     """ Validiert, ob Eingabe leer oder eine Fließkommazahl ist.
 
     :param what: str eingegebene Zeichenkette
@@ -70,60 +74,61 @@ def check_entry(what : str = ""):
         except ValueError:
             return False
 
+
 # Hauptfenster
 root = Tk()
 root.title("Feet to Meters")
 check_entry_wrapper = root.register(check_entry)
 
 # Rahmen im Hauptfenster (aus ttk für Farbanpassung)
-mainframe = ttk.Frame(root, padding = "3 3 12 12")
+mainframe = ttk.Frame(root, padding="3 3 12 12")
 
-mainframe.grid(column = 0, row = 0, sticky = NW)
-root.columnconfigure(0, weight = 1)
-root.rowconfigure(0, weight = 1)
+mainframe.grid(column=0, row=0, sticky=NW)
+root.columnconfigure(0, weight=1)
+root.rowconfigure(0, weight=1)
 
 # Eingabefeld für Länge in feet
 feet = StringVar()
-feet_entry = ttk.Entry(mainframe, width = 7, textvariable = feet,
-                       validatecommand = (check_entry_wrapper, '%P'),
-                       validate = 'key')
-feet_entry.grid(column = 2, row = 1, sticky = (W, E))
+feet_entry = ttk.Entry(mainframe, width=7, textvariable=feet,
+                       validatecommand=(check_entry_wrapper, '%P'),
+                       validate='key')
+feet_entry.grid(column=2, row=1, sticky=W + E)
 
 # Einheit-Label für Eingabefeld der Länge in feet
-ttk.Label(mainframe, text = "feet").grid(column = 3, row = 1, sticky = W)
+ttk.Label(mainframe, text="feet").grid(column=3, row=1, sticky=W)
 
 # Label für Ausgabefeld der Länge in Metern
-ttk.Label(mainframe, text = "ist äquivalent zu").grid(column = 1, row = 2, sticky = E)
+ttk.Label(mainframe, text="ist äquivalent zu").grid(column=1, row=2, sticky=E)
 
 # Einheit-Label für Ausgabefeld der Länge in Metern
-ttk.Label(mainframe, text = "Meter").grid(column = 3, row = 2, sticky = W)
+ttk.Label(mainframe, text="Meter").grid(column=3, row=2, sticky=W)
 
 # Ausgabefeld für Länge in Metern
 meters = StringVar()
-meters_entry = ttk.Entry(mainframe, width = 7, textvariable = meters)
-meters_entry.grid(column = 2, row = 2, sticky = (W,E))
-meters_entry.configure(state = 'readonly') # keine Eingabe, aber selektierbar
+meters_entry = ttk.Entry(mainframe, width=7, textvariable=meters)
+meters_entry.grid(column=2, row=2, sticky=(W, E))
+meters_entry.configure(state='readonly')  # keine Eingabe, aber selektierbar
 
 # Button für Berechnung
 
-button_calc = ttk.Button(mainframe, text = "Berechne", command = calculate)
-button_calc.grid(column = 3, row = 3, sticky = W)
+button_calc = ttk.Button(mainframe, text="Berechne", command=calculate)
+button_calc.grid(column=3, row=3, sticky=W)
 
 # schönere Abstände
 for child in mainframe.winfo_children():
-    child.grid_configure(padx = 5, pady = 5)
+    child.grid_configure(padx=5, pady=5)
 
 # Statusbar
 s = ttk.Style()
-s.configure('aFrame.TFrame', background = "yellow")
-s.configure('bFrame.TFrame', background = "green")
-s.configure('cFrame.TFrame', background = "red")
+s.configure('aFrame.TFrame', background="yellow")
+s.configure('bFrame.TFrame', background="green")
+s.configure('cFrame.TFrame', background="red")
 frame_statusbar = ttk.Frame(root)
 frame_statusbar['relief'] = 'sunken'
 frame_statusbar['height'] = 12
 frame_statusbar['style'] = 'aFrame.TFrame'
-frame_statusbar.grid_propagate(0) # Feste Größe an Grid-Packer weitergeben
-frame_statusbar.grid(column = 0, row = 1, sticky = W+S+E)
+frame_statusbar.grid_propagate(0)  # Feste Größe an Grid-Packer weitergeben
+frame_statusbar.grid(column=0, row=1, sticky=W + S + E)
 
 # Setze Fokus in Eingabefeld
 feet_entry.focus()