当我在网格中创建button + entry + button时，entry居中，但没有完全填充列。如何通过Entry填充列？
# Python 3.4.1
import io
import requests
import tkinter as tk
from PIL import Image, ImageTk
def get_image():
im = requests.get('http://lorempixel.com/' + str(random.randint(300, 400)) + '/' + str(random.randint(70, 120)) + '/')
return Image.open(io.BytesIO(im.content))
class ImageSelect(tk.Frame):
def __init__(self, master=None):
tk.Frame.__init__(self, master)
master.resizable(width=False, height=False)
master.title('Image manager')
master.iconify = False
master.deiconify = False
master.grab_set = True
image = ImageTk.PhotoImage(get_image())
self.image = tk.Label(image=image)
self.image.image = image
self.image.grid(row=0, columnspan=3)
self.reload = tk.Button(text='Reload').grid(row=1, column=0, sticky='w')
self.path = tk.Entry().grid(row=1, column=1, sticky='we')
self.submit = tk.Button(text='Submit').grid(row=1, column=2, sticky='e')
root = tk.Tk()
app = ImageSelect(master=root)
app.mainloop()