You can get the numerical index of the last item with the documented index command, passing in the special string “end”: last_index = the_listbox.index(“end”) To get the value of the last item you can use “end” in the get method as well: last_value = the_listbox.get(“end”) To make sure that the last item in the listbox … Read more
5th or 6th or 7th argument passed to calcola_cedimento is empty string, i.e. at least one of following returned empty string finestra_ag.get() finestra_ss.get() finestra_st.get() If user is allowed to let said entries empty you should provide default values for this case. If for example ag value should be “1” in such case, you might do … Read more
If you are meaning a setting title of your tkinter window by “this”. You have several options. Option 1 if __name__ == ‘__main__’: your_gui = YourGUI() your_gui.title(‘My Title’) # Set title your_gui.mainloop() Option 2 def __init__(self): # inherit tkinter’s window methods tk.Tk.__init__(self) self.title(‘My Title’) # Set title ……. tk.Button(self, text=”exit!”, command=self.EXITME).grid(row=4, column=0, columnspan=2) Both options … Read more
This has nothing to do with your specific Button Code. Indentation Error occur, when your formatting is wrong. your lines always start with a specified number of blanks or tabs (called Indentation). somewhere this went wrong. To get rid of this, check all your Indents in the beginning of your lines. And very important do … Read more
You’re setting your StringVar’s wrong… textvariable = “self.var” + str(x) This is just a string. Not a reference to the StringVar. In your calc function you’re doing this: >>> float(”) Traceback (most recent call last): File “<stdin>”, line 1, in <module> ValueError: could not convert string to float: Because your StringVar has no “value” — … Read more
So there are several red flags right away… (multiple mainloop calls, classes in classes, calling root inside listbox) It seems like you are missing one of the main concepts of many gui frameworks, and that is that 1 window is not 1 application. In general the “root” of the application is the controller in the … Read more
The simplest way is to implement the entire window as a subclass of a tk Frame, and then destroy and recreate it. Your code might look something like this: import Tkinter as tk class Example(tk.Frame): def __init__(self, parent): tk.Frame.__init__(self, parent) <other code here…> class Application: def __init__(self): self.root = tk.Tk() self.frame = None refreshButton = … Read more
The issue is that openpyxl doesn’t evaluate the formula in excel. it will only return the last value saved by excel or ‘None’ (with data_only=True). The latter is what is happening when you change an input cell and use [cell].value to call the value of the cell with the formula. When you don’t change the … Read more
I can’t test it since you didn’t provide a working example, but the first thing I notice is that you increment trow after you add the row, so the last row is trow – 1. Since you’ll need to decrement it anyway just do that before you try to delete. def delete_row(): trow -= 1 … Read more
You are missing some important parts here. You need to configure the menu first and you also need to add the cascade label. Take a look at this code. import tkinter def hey(): print(“hello”) def myNew(): # you forgot to use tkinter.Label here. mlabel = tkinter.Label(root, text=”yo”).pack() root = tkinter.Tk() root.title(“Wizelane”) root.geometry(‘400×80+350+340’) my_menu = tkinter.Menu(root) … Read more
You can use root.after(miliseconds, function_name, argument) to execute function with delay and root.mainloop() (and program) will work normally. You can use datetime to convert text to datetime object, substract two dates and get difference in milliseconds. try: import tkinter as tk import tkinter.messagebox as tkMessageBox print(“Python 3”) except: import Tkinter as tk import tkMessageBox print(“Python … Read more
You shouldn’t put any logic in a lambda. Just create a normal function that has any logic you want, and call it from the button. It’s really no more complicated that that. class SomePage(…): def __init__(…): … button1 = tk.Button(self, text=”Back to Home”, command=lambda: self.maybe_switch_page(StartPage)) … def maybe_switch_page(self, destination_page): if …: self.controller.show_frame(destination_page) else: … If … Read more
For anyone who has the same problem in the future, the solution is to remove the extra line. writer=csv.DictWriter(f,fieldnames=fieldnames, lineterminator=”\n”) Although it can be read with the extra line spacing by changing This: namesList = [x[0] for x in people] To this: namesList = [x[0:1] for x in people] (in my example) blank results are … Read more
when you import x , it binds the name x to x object , It doesn’t give you the direct access to any object that is your module, If you want access any object you need to specify like this x.myfunction() On the other side when you import using from x import * , It … Read more
According to the tcl documentation, a ttk.Treeview widget does have commands to add and remove a tag from a node or a list of nodes. However, these methods are not provided in the official tkinter wrapper; see the Treeview class in /usr/lib/python3.8/tkinter/ttk.py. Building on the comment by @JasonYang and answer by @CoolCloud, the test code … Read more