Python tkinter place put frame to the bottom

问题

I have this code

class App(object):
    def __init__(self):
        self.root = Tk()
        self.root.attributes('-zoomed', True)

        f1 = Frame(self.root, bd=1, bg="green", relief=SUNKEN)
        f2 = Frame(self.root, bd=1, bg="red", relief=SUNKEN)
        f3 = Frame(self.root, bd=1, bg="blue", relief=SUNKEN)

        split = 0.5
        f1.place(relx=0, relheight=1, relwidth=split)
        f2.place(relx=split, relheight=1, relwidth=1.0 - split)
        f3.place(height=50, width=self.screen_width)

app = App()
app.root.mainloop()

and the output is this

How to put the blue frame to the bottom of the window/screen?

回答1:

I know you specifically asked about place, but honestly, you should not use place except in very rare circumstances. The layout you're trying to achieve is very easy with both grid and pack.

Using pack:

f3.pack(side="bottom", fill="x")
f1.pack(side="left", fill="both", expand=True)
f2.pack(side="right", fill="both", expand=True)

Using grid:

# row zero takes up all extra vertical space
# column 0 and column 1 take an equal amount of all horizontal space
self.root.grid_rowconfigure(0, weight=1)
self.root.grid_columnconfigure(0, weight=1)
self.root.grid_columnconfigure(1, weight=1)

f1.grid(row=0, column=0, sticky="nsew")
f2.grid(row=0, column=1, sticky="nsew")
f3.grid(row=1, column=0, columnspan=2, sticky="ew")

来源：https://stackoverflow.com/questions/37017472/python-tkinter-place-put-frame-to-the-bottom