first commit

main.py

@@ -0,0 +1,38 @@
+from tkinter import *
+from tkinter.ttk import *
+
+class Window(Frame):
+    def __init__(self, master=None):
+        Frame.__init__(self, master)
+        self.master = master
+
+root = Tk()
+app = Window(root)
+
+
+def add_base():
+    out = []
+    for x in combo['values']:
+        out.append(int(x))
+    out.append(int(txt.get()))
+    combo['values'] = sorted(out)
+# set window title
+root.wm_title("Numerical converter")
+lbl = Label(root, text="Please enter a number!", font=("Arial Bold", 25))
+lbl.grid(column=0, row=0)
+
+btn = Button(root, text="Add", command=add_base)
+btn.grid(column=0, row=4)
+
+txt = Entry(root,width=10, state='enabled')
+txt.grid(column=0, row = 1)
+
+combo = Combobox(root)
+combo['values']= (2, 10, 16)
+
+combo.current(1) #set the selected item
+
+combo.grid(column=0, row=3)
+
+root.geometry('400x300')
+root.mainloop()