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3031
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1 """File selection dialog classes.
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2
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3 Classes:
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4
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5 - FileDialog
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6 - LoadFileDialog
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7 - SaveFileDialog
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8
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9 XXX Bugs:
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10
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11 - The fields are not labeled
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12 - Default doesn't have absolute pathname
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13 - Each FileDialog instance can be used only once
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14 - There is no easy way for an application to add widgets of its own
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15
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16 """
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17
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18 from Tkinter import *
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19 from Dialog import Dialog
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20
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21 ANCHOR = 'anchor'
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22
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23 import os
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24 import fnmatch
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25
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26
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27 class FileDialog:
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28
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29 """Standard file selection dialog -- no checks on selected file.
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30
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31 Usage:
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32
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33 d = FileDialog(master)
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34 file = d.go(directory, pattern, default)
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35 if file is None: ...canceled...
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36
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37 """
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38
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39 title = "File Selection Dialog"
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40
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41 def __init__(self, master):
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42 self.master = master
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43 self.directory = None
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44 self.top = Toplevel(master)
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45 self.top.title(self.title)
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46 self.filter = Entry(self.top)
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47 self.filter.pack(fill=X)
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48 self.filter.bind('<Return>', self.filter_command)
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49 self.midframe = Frame(self.top)
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50 self.midframe.pack(expand=YES, fill=BOTH)
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51 self.dirs = Listbox(self.midframe)
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52 self.dirs.pack(side=LEFT, expand=YES, fill=BOTH)
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53 self.dirs.bind('<ButtonRelease-1>', self.dirs_select_event)
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54 self.dirs.bind('<Double-ButtonRelease-1>', self.dirs_double_event)
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55 self.files = Listbox(self.midframe)
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56 self.files.pack(side=RIGHT, expand=YES, fill=BOTH)
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57 self.files.bind('<ButtonRelease-1>', self.files_select_event)
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58 self.files.bind('<Double-ButtonRelease-1>', self.files_double_event)
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59 self.selection = Entry(self.top)
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60 self.selection.pack(fill=X)
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61 self.selection.bind('<Return>', self.ok_event)
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62 self.botframe = Frame(self.top)
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63 self.botframe.pack(fill=X)
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64 self.ok_button = Button(self.botframe,
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65 text="OK",
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66 command=self.ok_command)
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67 self.ok_button.pack(side=LEFT)
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68 self.filter_button = Button(self.botframe,
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69 text="Filter",
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70 command=self.filter_command)
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71 self.filter_button.pack(side=LEFT, expand=YES)
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72 self.cancel_button = Button(self.botframe,
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73 text="Cancel",
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74 command=self.cancel_command)
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75 self.cancel_button.pack(side=RIGHT)
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76
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77 def go(self, directory=os.curdir, pattern="*", default=""):
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78 self.directory = directory
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79 self.set_filter(directory, pattern)
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80 self.set_selection(default)
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81 self.selection.focus_set()
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82 self.filter_command()
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83 self.top.grab_set()
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84 try:
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85 self.master.mainloop()
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86 except SystemExit, how:
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87 self.top.destroy()
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88 return how
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89
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90 def dirs_double_event(self, event):
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91 ## self.dirs_select_event(event)
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92 self.filter_command()
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93
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94 def dirs_select_event(self, event):
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95 dir, pat = self.get_filter()
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96 subdir = self.dirs.get(ANCHOR)
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97 dir = os.path.normpath(os.path.join(self.directory, subdir))
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98 self.set_filter(dir, pat)
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99
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100 def files_double_event(self, event):
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101 ## self.files_select_event(event)
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102 ## self.master.update_idletasks()
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103 self.ok_command()
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104
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105 def files_select_event(self, event):
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106 file = self.files.get(ANCHOR)
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107 self.set_selection(file)
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108
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109 def ok_event(self, event):
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110 self.ok_command()
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111
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112 def ok_command(self):
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113 raise SystemExit, self.selection.get()
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114
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115 def filter_command(self, event=None):
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116 dir, pat = self.get_filter()
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117 try:
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118 names = os.listdir(dir)
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119 except os.error:
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120 self.master.bell()
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121 return
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122 self.directory = dir
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123 self.set_filter(dir, pat)
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124 names.sort()
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125 subdirs = [os.pardir]
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126 matchingfiles = []
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127 for name in names:
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128 fullname = os.path.join(dir, name)
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129 if os.path.isdir(fullname):
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130 subdirs.append(name)
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131 elif fnmatch.fnmatch(name, pat):
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132 matchingfiles.append(name)
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133 self.dirs.delete(0, END)
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134 for name in subdirs:
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135 self.dirs.insert(END, name)
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136 self.files.delete(0, END)
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137 for name in matchingfiles:
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138 self.files.insert(END, name)
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139
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140 def get_filter(self):
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141 filter = self.filter.get()
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142 if filter[-1:] == os.sep:
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143 filter = filter + "*"
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144 return os.path.split(filter)
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145
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146 def cancel_command(self):
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147 raise SystemExit, None
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148
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149 def set_filter(self, dir, pat):
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150 self.filter.delete(0, END)
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151 self.filter.insert(END, os.path.join(dir or os.curdir, pat or "*"))
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152
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153 def set_selection(self, file):
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154 self.selection.delete(0, END)
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155 self.selection.insert(END, os.path.join(self.directory, file))
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156
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157
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158 class LoadFileDialog(FileDialog):
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159
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160 """File selection dialog which checks that the file exists."""
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161
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162 title = "Load File Selection Dialog"
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163
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164 def ok_command(self):
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165 file = self.selection.get()
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166 if not os.path.isfile(file):
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167 self.master.bell()
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168 else:
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169 raise SystemExit, file
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170
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171
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172 class SaveFileDialog(FileDialog):
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173
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174 """File selection dialog which checks that the file may be created."""
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175
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176 title = "Save File Selection Dialog"
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177
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178 def ok_command(self):
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179 file = self.selection.get()
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180 if os.path.exists(file):
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181 if os.path.isdir(file):
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182 self.master.bell()
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183 return
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184 d = Dialog(self.master,
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185 title="Overwrite Existing File Question",
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186 text="Overwrite existing file %s?" % `file`,
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187 bitmap='questhead',
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188 default=0,
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189 strings=("Yes", "Cancel"))
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190 if d.num != 0: file = None
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191 else:
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192 head, tail = os.path.split(file)
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193 if not os.path.isdir(head):
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194 self.master.bell()
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195 return
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196 raise SystemExit, file
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197
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198
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199 def test():
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200 """Simple test program."""
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201 root = Tk()
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202 root.withdraw()
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203 fd = LoadFileDialog(root)
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204 loadfile = fd.go()
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205 fd = SaveFileDialog(root)
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206 savefile = fd.go()
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207 print loadfile, savefile
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208
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209
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210 if __name__ == '__main__':
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211 test()
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