tkinterを使ってのGUI化をしたい

前提・実現したいこと

GUIの実装
ある本で人口無能をGUI化しようとしたのですがうまくいきません。
初心者でどう直していいかわからないので教えてください。

発生している問題・エラーメッセージ

TclError: couldn't open "img1.gif": no such file or directory

該当のソースコード

Phython
1import tkinter as tk
2from ptna import *
3
4entry = None
5response_area = None
6lb = None
7action = None
8ptna = Ptna('ptna')
9
10def putlog(str):
11    lb.insert(tk.END, str)
12
13def prompt():
14    p = ptna.name
15    if (action.get())==0:
16        p += ':' + ptna.responder.name
17    return p + '> '
18
19
20def talk():
21    value = entry.get()
22    if not value:
23        response_area.configure(text='なに？')
24    else:
25        response = ptna.dialogue(value)
26        response_area.configure(text=response)
27        putlog('> ' + value)
28        putlog(prompt() + response)
29        entry.delete(0, tk.END)
30
31
32def run():
33    global entry, response_area, lb, action
34
35    root = tk.Tk()
36    root.geometry('880x560')
37    root.title('Intelligent Agent : ')
38    font=('Helevetica', 14)
39    font_log=('Helevetica', 11)
40
41    menubar = tk.Menu(root)
42    root.config(menu=menubar)
43    filemenu = tk.Menu(menubar)
44    menubar.add_cascade(label='ファイル', menu=filemenu)
45    filemenu.add_command(label='閉じる', command=root.destroy)
46    action = tk.IntVar()
47    optionmenu = tk.Menu(menubar)
48    menubar.add_cascade(label='オプション', menu=optionmenu)
49    optionmenu.add_radiobutton(
50        label='Responderを表示',
51        variable = action,
52        value = 0
53    )
54    optionmenu.add_radiobutton(
55        label='Responderを表示しない',
56        variable = action,
57        value = 1
58    )
59
60    canvas = tk.Canvas(
61        root,
62        width = 500,
63        height = 300,
64        relief=tk.RIDGE,
65        bd=2
66    )
67    canvas.place(x=370, y=0)
68
69    img = tk.PhotoImage(file = 'img1.gif')
70    canvas.create_image(
71        0,
72        0,
73        image = img,
74        anchor = tk.NW
75    )
76
77    response_area = tk.Label(
78        root,
79        width=50,
80        height=10,
81        bg='yellow',
82        font=font,
83        relief=tk.RIDGE,
84        bd=2
85    )
86    response_area.place(x=370, y=305)
87
88
89    frame = tk.Frame(
90        root,
91        relief=tk.RIDGE,
92        borderwidth = 4
93    )
94    entry = tk.Entry(
95        frame,
96        width=70,
97        font=font
98    )
99    entry.pack(side = tk.LEFT)
100    entry.focus_set()
101    button = tk.Button(
102        frame,
103        width=15,
104        text='話す',
105        command=talk
106    )
107    button.pack(side = tk.LEFT)
108    frame.place(x=30, y=520)
109
110
111    lb = tk.Listbox(
112        root,
113        width=42,
114        height=30,
115        font=font_log
116        )
117    sb1 = tk.Scrollbar(
118        root,
119        orient = tk.VERTICAL,
120        command = lb.yview
121        )
122    sb2 = tk.Scrollbar(
123            root,
124            orient = tk.HORIZONTAL,
125            command = lb.xview
126          )
127    lb.configure(yscrollcommand = sb1.set)
128    lb.configure(xscrollcommand = sb2.set)
129    lb.grid(row = 0, column = 0)
130    sb1.grid(row = 0, column = 1, sticky = tk.NS)
131    sb2.grid(row = 1, column = 0, sticky = tk.EW)
132
133    root.mainloop()
134
135
136if __name__ == '__main__':
137    run()