從Tkinter圖像收集數據後創建一個python字典

Question

我想創建一個字典的列表，基於我從圖像（座標和圖像類型）中選取矩形的信息。在按鈕釋放時，我想將提取的字典追加到空列表中。該代碼適用於第一個字典，但是當我選擇第二個三角形時，我獲得的字典覆蓋了第一個。

Could you please come up with a solution so that in the end i get the list of dictionaries like this: 

[{'bottom_right_coords': [447, 349], 'type': 'middle name', 'top_left_coords': [290, 311]}, {'bottom_right_coords': [447, 349], 'type': 'first name', 'top_left_coords': [290, 311]}, etc etc etc. ] 



import Tkinter as tk 
from Tkinter import * 
import PIL 
from PIL import Image, ImageTk 
import pygame 
import Pmw 
from collections import OrderedDict 

pygame.init() 

global d, D, dict_list 
global DEFAULTVALUE_OPTION 
global options 
DEFAULTVALUE_OPTION = "Select an option" 
options = ['address', 
      'name', 
      'occupation'] 
d = {} 
dict_list = [None] * 2000 
list = range(2000) 
D = OrderedDict.fromkeys(list) 



class ExampleApp(tk.Tk): 

    def __init__(self, parent = None): 
     tk.Tk.__init__(self, parent) 
     self.x = self.y = 0 
     self.canvas = tk.Canvas(self, width=700, height=700, cursor="cross", relief=SUNKEN) 
     self.canvas.bind("<ButtonPress-1>", self.on_button_press) 
     self.canvas.bind("<B1-Motion>", self.on_move_press) 
     self.canvas.bind("<ButtonRelease-1>", self.on_button_release) 

     self.rect = None 

     self.start_x = None 
     self.start_y = None 


     self._draw_image() 



    def _draw_image(self): 
     self.sbarV = Scrollbar(self, orient=VERTICAL) 
     self.sbarH = Scrollbar(self, orient=HORIZONTAL) 

     self.sbarV.config(command=self.canvas.yview) 
     self.sbarH.config(command=self.canvas.xview) 

     self.canvas.config(yscrollcommand=self.sbarV.set) 
     self.canvas.config(xscrollcommand=self.sbarH.set) 
     self.sbarV.pack(side=RIGHT, fill=Y) 
     self.sbarH.pack(side=BOTTOM, fill=X) 

     self.canvas.pack(side="top", fill="both", expand=True) 
     self.im = Image.open("/home/madalina/madalina/image/page-001.jpg") 
     width, height = self.im.size 
     self.canvas.config(scrollregion=(0, 0, width, height)) 
     self.tk_im = ImageTk.PhotoImage(self.im) 
     self.canvas.create_image(0,0,anchor="nw",image=self.tk_im) 





    def on_button_press(self, event): 
     # save mouse drag start position 
     self.start_x = event.x 
     self.start_y = event.y 
     d["top_left_coords"] = [self.start_x, self.start_y] 


     # create rectangle if not yet exist 
     #if not self.rect: 
     self.rect = self.canvas.create_rectangle(self.x, self.y, 100, 100, width = 2, outline = "gold") 

    def on_move_press(self, event): 
     curX, curY = (event.x, event.y) 

     # expand rectangle as you drag the mouse 
     self.canvas.coords(self.rect, self.start_x, self.start_y, curX, curY) 



    def on_button_release(self, event): 
     top = Tk() 
     Label(top, text="New Option").grid(row=0) 
     Label(top, text = "Coordinates").grid(row=1) 
     E1 = Entry(top, bd = 5) 
     E2 = Entry(top, bd = 5) 
     # e1 = E1.get() 
     # e2 = E2.get() 
     E1.grid(row=0, column=1) 
     E2.grid(row=1, column=1) 

     def addOption(): 
      d["type"] = E1.get() 
      print d 



     def createDict(): 
      dict_list.append(d) 
      print "lista de dictionare este " + str(dict_list) 

     B1 = Button(top, text = "ADD", command = addOption) 
     B1.grid(row=3, column=0, sticky=W, pady=4) 
     B1 = Button(top, text = "Create Dict", command = createDict) 
     B1.grid(row=3, column=1, sticky=W, pady=4) 

     d["bottom_right_coords"] = [event.x, event.y] 


if __name__ == "__main__": 
    app = ExampleApp() 
    app.mainloop() 

Answer 1

找到你的問題

讓我們來看看這個功能在這裏

def on_button_press(self, event): 
    # save mouse drag start position 
    self.start_x = event.x 
    self.start_y = event.y 
    d["top_left_coords"] = [self.start_x, self.start_y] 

我喜歡那些前兩行。所以我懷疑最後一個是小事。

d["top_left_coords"] = [self.start_x, self.start_y] 

不是你的問題，但值得一提的

我的第一印象是： 「d是未申報的，所以這會崩潰」。不是這樣，因爲你已經聲明它是一個全局變量。所以我的第一個建議是：確保你肯定需要一個全局變量。 As this 2000+ voted answer says

我想象它的原因是，由於全局變量是如此危險，巨蟒要確保你真的知道這是你通過明確要求全球關鍵字玩什麼。

Here's某處開始，如果你想刪除全局變量。

如果你決定全局變量是要走的路，請請其命名爲東西比d

但更多的幫助到您問題

讓d詞典列表，並追加到它。順便說一句，元組可能更有意義比座標列表，因爲他們是不可改變的

d = [] 
... 
d.append({self.start_x,self.start_y}) 
... 
#retrieving last click 
print d[-1] 
# adding other things to the 'last click dictionary' 
d[-1]['type'] = 'foobar'