I would like to know why the methods SavePVParms Close and ApplyGraph are not defined when I call them through the buttons. I know that if I put them inside __init__ they will work and my problem is solved but I don't understand why it wouldn't work the way it is. I tried to look for this question and found this Python Class: Global/Local variable name not defined and this Python says global name not defined but forgive me if I can't understand the answer there. Could you help me understand why?
Background: This class is a top level window that popups when I press a button in the root window (here i am just showing you guys the toplevel window directly). It is supposed to pass a dictionary of all the entries when I save it (not yet implemented). **Additionally (but not required to answer if you don't want to) is this an adequate style of coding in OOP? (less than 1 week learning tkinter and moving from precedural python to OOP python).
import Tkinter as tk
import ttk
class PVDialog(tk.Toplevel):
def SavePVParms(self):
print "saved"
self.destroy()
def Close(self):
self.destroy()
def ApplyGraph(self):
print 'applied'
def __init__(self, parent):
tk.Toplevel.__init__(self, parent)
print parent
self.title('PV Parameters Configuration')
self.geometry('800x480')
self.resizable(width=False, height=False)
self.columnconfigure(0, weight=1)
self.columnconfigure(1, weight=8)
self.rowconfigure(0, weight=1)
self.rowconfigure(1, weight=2)
# ====== FRAMES =======
lb1Frame = tk.LabelFrame(self, text='Electric Properties')
lb1Frame.grid(row=0, column=0, sticky='ewns', pady=(15, 2), padx=(30,10))
AdvFrame = tk.LabelFrame(self, text='Thermal Properties')
AdvFrame.grid(row=1, column=0, sticky='ewns', pady=5, padx=(30,10))
pcurveFrame = tk.LabelFrame(self, text='PV Curves')
pcurveFrame.grid(row=0, column=1, sticky='ewns', padx=(0,30), pady=(15,5),rowspan=2)
ctrlFrame = tk.Frame(self)
ctrlFrame.grid(row=2, column=0, columnspan=2, sticky='ens', padx=20, pady=(2, 20))
# ======== PARAMETER INPUT DATA FRAME ============= #
labelName = tk.Label(lb1Frame, text='Name', anchor='w')
labelCellType = tk.Label(lb1Frame, text='Cell Type', anchor='w')
labelPower = tk.Label(lb1Frame, text='Rated Power [W]', anchor='w')
labelOV = tk.Label(lb1Frame, text='Open Voltage [V]', anchor='w')
labelSCC = tk.Label(lb1Frame, text='Short-circuit Current [A]', anchor='w')
labelMPC = tk.Label(lb1Frame, text='Maximum Point Current [I]', anchor='w')
labelMPV = tk.Label(lb1Frame, text="Maximum point Voltage [V]", anchor='w')
labelSeries = tk.Label(lb1Frame, text='Cells in series', anchor='w')
labelPallel = tk.Label(lb1Frame, text='Cells in parallel', anchor='w')
labelNOCT = tk.Label(AdvFrame, text='NOCT', anchor='w')
labelThC = tk.Label(AdvFrame, text='Current T factor [%/K]', anchor='w')
labelThV = tk.Label(AdvFrame, text='Voltage T factor [%/K]', anchor='w')
labelThP = tk.Label(AdvFrame, text='Power T factor [%/K]', anchor='w')
labelName.grid(row=0, sticky='ew', padx=10, pady=2)
labelCellType.grid(row=1, sticky='ew', padx=10, pady=2)
labelPower.grid(row=2, sticky='ew', padx=10, pady=2)
labelOV.grid(row=3, sticky='ew', padx=10, pady=2)
labelSCC.grid(row=4, sticky='ew', padx=10, pady=2)
labelMPC.grid(row=5, sticky='ew', padx=10, pady=2)
labelMPV.grid(row=6, sticky='ew', padx=10, pady=2)
labelSeries.grid(row=7, sticky='ew', padx=10, pady=2)
labelPallel.grid(row=8, sticky='ew', padx=10, pady=2)
labelNOCT.grid(row=9 , sticky='ew', padx=10, pady=2)
labelThC.grid(row=10, sticky='ew', padx=10, pady=2)
labelThV.grid(row=11, sticky='ew', padx=10, pady=2)
labelThP.grid(row=12, sticky='ew', padx=10, pady=2)
entryName = ttk.Entry(lb1Frame, show='Default')
entryCellType = ttk.Combobox(lb1Frame)
entryPower = ttk.Entry(lb1Frame)
entryOV = ttk.Entry(lb1Frame)
entrySCC = ttk.Entry(lb1Frame)
entryMPC = ttk.Entry(lb1Frame)
entryMPV = ttk.Entry(lb1Frame)
entrySeries = ttk.Entry(lb1Frame)
entryPallel = ttk.Entry(lb1Frame)
entryNOCT = ttk.Entry(AdvFrame, width=23)
entryThC = ttk.Entry(AdvFrame, width=23)
entryThV = ttk.Entry(AdvFrame, width=23)
entryThP = ttk.Entry(AdvFrame, width=23)
entryName.grid(row=0, column=1, sticky='ew')
entryCellType.grid(row=1, column=1, sticky='ew')
entryPower.grid(row=2, column=1, sticky='ew')
entryOV.grid(row=3, column=1, sticky='ew')
entrySCC.grid(row=4, column=1, sticky='ew')
entryMPC.grid(row=5, column=1, sticky='ew')
entryMPV.grid(row=6, column=1, sticky='ew')
entrySeries.grid(row=7, column=1, sticky='ew')
entryPallel.grid(row=8, column=1, sticky='ew')
entryNOCT.grid(row=9, column=1, sticky='w', padx=(26,0))
entryThC.grid(row=10, column=1, sticky='w', padx=(26,0))
entryThV.grid(row=11, column=1, sticky='w', padx=(26,0))
entryThP.grid(row=12, column=1, sticky='w', padx=(26,0))
# ==== BUTTON COMANDS ======
saveBttn = ttk.Button(ctrlFrame, text='Save', command=SavePVParms)
closBttn = ttk.Button(ctrlFrame, text='Cancel', command=Close)
applyBttn = ttk.Button(ctrlFrame, text='Apply', command=ApplyGraph)
saveBttn.grid()
closBttn.grid(row=0, column=1, padx=10)
applyBttn.grid(row=0, column=2, padx=(0, 10))
# ======== RUNNIG THE CLIENT ============
root = tk.Tk()
dialog = PVDialog(root)
root.mainloop()
Update: As I was making about to submit this question, I remembered that __init__ is the first thing that is read and executed in the Class, so that's why the are defined if I put them in __init__. I still don't understand why python can't call them if they are outside __init__ doesn't python read the whole class? how can I call then self.method that is outside of __init__ then?. Thanks!
