562 lines
18 KiB
Python
562 lines
18 KiB
Python
|
# Natural Language Toolkit: GUI Demo for Glue Semantics with Discourse
|
||
|
|
# Representation Theory (DRT) as meaning language
|
||
|
|
#
|
||
|
|
# Author: Dan Garrette <dhgarrette@gmail.com>
|
||
|
|
#
|
||
|
|
# Copyright (C) 2001-2019 NLTK Project
|
||
|
|
# URL: <http://nltk.org/>
|
||
|
|
# For license information, see LICENSE.TXT
|
||
|
|
|
||
|
|
try:
|
||
|
|
from six.moves.tkinter import (
|
||
|
|
Button,
|
||
|
|
Frame,
|
||
|
|
IntVar,
|
||
|
|
Label,
|
||
|
|
Listbox,
|
||
|
|
Menu,
|
||
|
|
Scrollbar,
|
||
|
|
Tk,
|
||
|
|
)
|
||
|
|
from six.moves.tkinter_font import Font
|
||
|
|
from nltk.draw.util import CanvasFrame, ShowText
|
||
|
|
|
||
|
|
except ImportError:
|
||
|
|
"""Ignore ImportError because tkinter might not be available."""
|
||
|
|
|
||
|
|
from nltk.util import in_idle
|
||
|
|
from nltk.tag import RegexpTagger
|
||
|
|
from nltk.parse import MaltParser
|
||
|
|
from nltk.sem.logic import Variable
|
||
|
|
from nltk.sem.drt import DrsDrawer, DrtVariableExpression
|
||
|
|
from nltk.sem.glue import DrtGlue
|
||
|
|
|
||
|
|
|
||
|
|
class DrtGlueDemo(object):
|
||
|
|
def __init__(self, examples):
|
||
|
|
# Set up the main window.
|
||
|
|
self._top = Tk()
|
||
|
|
self._top.title('DRT Glue Demo')
|
||
|
|
|
||
|
|
# Set up key bindings.
|
||
|
|
self._init_bindings()
|
||
|
|
|
||
|
|
# Initialize the fonts.self._error = None
|
||
|
|
self._init_fonts(self._top)
|
||
|
|
|
||
|
|
self._examples = examples
|
||
|
|
self._readingCache = [None for example in examples]
|
||
|
|
|
||
|
|
# The user can hide the grammar.
|
||
|
|
self._show_grammar = IntVar(self._top)
|
||
|
|
self._show_grammar.set(1)
|
||
|
|
|
||
|
|
# Set the data to None
|
||
|
|
self._curExample = -1
|
||
|
|
self._readings = []
|
||
|
|
self._drs = None
|
||
|
|
self._drsWidget = None
|
||
|
|
self._error = None
|
||
|
|
|
||
|
|
self._init_glue()
|
||
|
|
|
||
|
|
# Create the basic frames.
|
||
|
|
self._init_menubar(self._top)
|
||
|
|
self._init_buttons(self._top)
|
||
|
|
self._init_exampleListbox(self._top)
|
||
|
|
self._init_readingListbox(self._top)
|
||
|
|
self._init_canvas(self._top)
|
||
|
|
|
||
|
|
# Resize callback
|
||
|
|
self._canvas.bind('<Configure>', self._configure)
|
||
|
|
|
||
|
|
#########################################
|
||
|
|
## Initialization Helpers
|
||
|
|
#########################################
|
||
|
|
|
||
|
|
def _init_glue(self):
|
||
|
|
tagger = RegexpTagger(
|
||
|
|
[
|
||
|
|
('^(David|Mary|John)$', 'NNP'),
|
||
|
|
(
|
||
|
|
'^(walks|sees|eats|chases|believes|gives|sleeps|chases|persuades|tries|seems|leaves)$',
|
||
|
|
'VB',
|
||
|
|
),
|
||
|
|
('^(go|order|vanish|find|approach)$', 'VB'),
|
||
|
|
('^(a)$', 'ex_quant'),
|
||
|
|
('^(every)$', 'univ_quant'),
|
||
|
|
('^(sandwich|man|dog|pizza|unicorn|cat|senator)$', 'NN'),
|
||
|
|
('^(big|gray|former)$', 'JJ'),
|
||
|
|
('^(him|himself)$', 'PRP'),
|
||
|
|
]
|
||
|
|
)
|
||
|
|
|
||
|
|
depparser = MaltParser(tagger=tagger)
|
||
|
|
self._glue = DrtGlue(depparser=depparser, remove_duplicates=False)
|
||
|
|
|
||
|
|
def _init_fonts(self, root):
|
||
|
|
# See: <http://www.astro.washington.edu/owen/ROTKFolklore.html>
|
||
|
|
self._sysfont = Font(font=Button()["font"])
|
||
|
|
root.option_add("*Font", self._sysfont)
|
||
|
|
|
||
|
|
# TWhat's our font size (default=same as sysfont)
|
||
|
|
self._size = IntVar(root)
|
||
|
|
self._size.set(self._sysfont.cget('size'))
|
||
|
|
|
||
|
|
self._boldfont = Font(family='helvetica', weight='bold', size=self._size.get())
|
||
|
|
self._font = Font(family='helvetica', size=self._size.get())
|
||
|
|
if self._size.get() < 0:
|
||
|
|
big = self._size.get() - 2
|
||
|
|
else:
|
||
|
|
big = self._size.get() + 2
|
||
|
|
self._bigfont = Font(family='helvetica', weight='bold', size=big)
|
||
|
|
|
||
|
|
def _init_exampleListbox(self, parent):
|
||
|
|
self._exampleFrame = listframe = Frame(parent)
|
||
|
|
self._exampleFrame.pack(fill='both', side='left', padx=2)
|
||
|
|
self._exampleList_label = Label(
|
||
|
|
self._exampleFrame, font=self._boldfont, text='Examples'
|
||
|
|
)
|
||
|
|
self._exampleList_label.pack()
|
||
|
|
self._exampleList = Listbox(
|
||
|
|
self._exampleFrame,
|
||
|
|
selectmode='single',
|
||
|
|
relief='groove',
|
||
|
|
background='white',
|
||
|
|
foreground='#909090',
|
||
|
|
font=self._font,
|
||
|
|
selectforeground='#004040',
|
||
|
|
selectbackground='#c0f0c0',
|
||
|
|
)
|
||
|
|
|
||
|
|
self._exampleList.pack(side='right', fill='both', expand=1)
|
||
|
|
|
||
|
|
for example in self._examples:
|
||
|
|
self._exampleList.insert('end', (' %s' % example))
|
||
|
|
self._exampleList.config(height=min(len(self._examples), 25), width=40)
|
||
|
|
|
||
|
|
# Add a scrollbar if there are more than 25 examples.
|
||
|
|
if len(self._examples) > 25:
|
||
|
|
listscroll = Scrollbar(self._exampleFrame, orient='vertical')
|
||
|
|
self._exampleList.config(yscrollcommand=listscroll.set)
|
||
|
|
listscroll.config(command=self._exampleList.yview)
|
||
|
|
listscroll.pack(side='left', fill='y')
|
||
|
|
|
||
|
|
# If they select a example, apply it.
|
||
|
|
self._exampleList.bind('<<ListboxSelect>>', self._exampleList_select)
|
||
|
|
|
||
|
|
def _init_readingListbox(self, parent):
|
||
|
|
self._readingFrame = listframe = Frame(parent)
|
||
|
|
self._readingFrame.pack(fill='both', side='left', padx=2)
|
||
|
|
self._readingList_label = Label(
|
||
|
|
self._readingFrame, font=self._boldfont, text='Readings'
|
||
|
|
)
|
||
|
|
self._readingList_label.pack()
|
||
|
|
self._readingList = Listbox(
|
||
|
|
self._readingFrame,
|
||
|
|
selectmode='single',
|
||
|
|
relief='groove',
|
||
|
|
background='white',
|
||
|
|
foreground='#909090',
|
||
|
|
font=self._font,
|
||
|
|
selectforeground='#004040',
|
||
|
|
selectbackground='#c0f0c0',
|
||
|
|
)
|
||
|
|
|
||
|
|
self._readingList.pack(side='right', fill='both', expand=1)
|
||
|
|
|
||
|
|
# Add a scrollbar if there are more than 25 examples.
|
||
|
|
listscroll = Scrollbar(self._readingFrame, orient='vertical')
|
||
|
|
self._readingList.config(yscrollcommand=listscroll.set)
|
||
|
|
listscroll.config(command=self._readingList.yview)
|
||
|
|
listscroll.pack(side='right', fill='y')
|
||
|
|
|
||
|
|
self._populate_readingListbox()
|
||
|
|
|
||
|
|
def _populate_readingListbox(self):
|
||
|
|
# Populate the listbox with integers
|
||
|
|
self._readingList.delete(0, 'end')
|
||
|
|
for i in range(len(self._readings)):
|
||
|
|
self._readingList.insert('end', (' %s' % (i + 1)))
|
||
|
|
self._readingList.config(height=min(len(self._readings), 25), width=5)
|
||
|
|
|
||
|
|
# If they select a example, apply it.
|
||
|
|
self._readingList.bind('<<ListboxSelect>>', self._readingList_select)
|
||
|
|
|
||
|
|
def _init_bindings(self):
|
||
|
|
# Key bindings are a good thing.
|
||
|
|
self._top.bind('<Control-q>', self.destroy)
|
||
|
|
self._top.bind('<Control-x>', self.destroy)
|
||
|
|
self._top.bind('<Escape>', self.destroy)
|
||
|
|
self._top.bind('n', self.next)
|
||
|
|
self._top.bind('<space>', self.next)
|
||
|
|
self._top.bind('p', self.prev)
|
||
|
|
self._top.bind('<BackSpace>', self.prev)
|
||
|
|
|
||
|
|
def _init_buttons(self, parent):
|
||
|
|
# Set up the frames.
|
||
|
|
self._buttonframe = buttonframe = Frame(parent)
|
||
|
|
buttonframe.pack(fill='none', side='bottom', padx=3, pady=2)
|
||
|
|
Button(
|
||
|
|
buttonframe,
|
||
|
|
text='Prev',
|
||
|
|
background='#90c0d0',
|
||
|
|
foreground='black',
|
||
|
|
command=self.prev,
|
||
|
|
).pack(side='left')
|
||
|
|
Button(
|
||
|
|
buttonframe,
|
||
|
|
text='Next',
|
||
|
|
background='#90c0d0',
|
||
|
|
foreground='black',
|
||
|
|
command=self.next,
|
||
|
|
).pack(side='left')
|
||
|
|
|
||
|
|
def _configure(self, event):
|
||
|
|
self._autostep = 0
|
||
|
|
(x1, y1, x2, y2) = self._cframe.scrollregion()
|
||
|
|
y2 = event.height - 6
|
||
|
|
self._canvas['scrollregion'] = '%d %d %d %d' % (x1, y1, x2, y2)
|
||
|
|
self._redraw()
|
||
|
|
|
||
|
|
def _init_canvas(self, parent):
|
||
|
|
self._cframe = CanvasFrame(
|
||
|
|
parent,
|
||
|
|
background='white',
|
||
|
|
# width=525, height=250,
|
||
|
|
closeenough=10,
|
||
|
|
border=2,
|
||
|
|
relief='sunken',
|
||
|
|
)
|
||
|
|
self._cframe.pack(expand=1, fill='both', side='top', pady=2)
|
||
|
|
canvas = self._canvas = self._cframe.canvas()
|
||
|
|
|
||
|
|
# Initially, there's no tree or text
|
||
|
|
self._tree = None
|
||
|
|
self._textwidgets = []
|
||
|
|
self._textline = None
|
||
|
|
|
||
|
|
def _init_menubar(self, parent):
|
||
|
|
menubar = Menu(parent)
|
||
|
|
|
||
|
|
filemenu = Menu(menubar, tearoff=0)
|
||
|
|
filemenu.add_command(
|
||
|
|
label='Exit', underline=1, command=self.destroy, accelerator='q'
|
||
|
|
)
|
||
|
|
menubar.add_cascade(label='File', underline=0, menu=filemenu)
|
||
|
|
|
||
|
|
actionmenu = Menu(menubar, tearoff=0)
|
||
|
|
actionmenu.add_command(
|
||
|
|
label='Next', underline=0, command=self.next, accelerator='n, Space'
|
||
|
|
)
|
||
|
|
actionmenu.add_command(
|
||
|
|
label='Previous', underline=0, command=self.prev, accelerator='p, Backspace'
|
||
|
|
)
|
||
|
|
menubar.add_cascade(label='Action', underline=0, menu=actionmenu)
|
||
|
|
|
||
|
|
optionmenu = Menu(menubar, tearoff=0)
|
||
|
|
optionmenu.add_checkbutton(
|
||
|
|
label='Remove Duplicates',
|
||
|
|
underline=0,
|
||
|
|
variable=self._glue.remove_duplicates,
|
||
|
|
command=self._toggle_remove_duplicates,
|
||
|
|
accelerator='r',
|
||
|
|
)
|
||
|
|
menubar.add_cascade(label='Options', underline=0, menu=optionmenu)
|
||
|
|
|
||
|
|
viewmenu = Menu(menubar, tearoff=0)
|
||
|
|
viewmenu.add_radiobutton(
|
||
|
|
label='Tiny',
|
||
|
|
variable=self._size,
|
||
|
|
underline=0,
|
||
|
|
value=10,
|
||
|
|
command=self.resize,
|
||
|
|
)
|
||
|
|
viewmenu.add_radiobutton(
|
||
|
|
label='Small',
|
||
|
|
variable=self._size,
|
||
|
|
underline=0,
|
||
|
|
value=12,
|
||
|
|
command=self.resize,
|
||
|
|
)
|
||
|
|
viewmenu.add_radiobutton(
|
||
|
|
label='Medium',
|
||
|
|
variable=self._size,
|
||
|
|
underline=0,
|
||
|
|
value=14,
|
||
|
|
command=self.resize,
|
||
|
|
)
|
||
|
|
viewmenu.add_radiobutton(
|
||
|
|
label='Large',
|
||
|
|
variable=self._size,
|
||
|
|
underline=0,
|
||
|
|
value=18,
|
||
|
|
command=self.resize,
|
||
|
|
)
|
||
|
|
viewmenu.add_radiobutton(
|
||
|
|
label='Huge',
|
||
|
|
variable=self._size,
|
||
|
|
underline=0,
|
||
|
|
value=24,
|
||
|
|
command=self.resize,
|
||
|
|
)
|
||
|
|
menubar.add_cascade(label='View', underline=0, menu=viewmenu)
|
||
|
|
|
||
|
|
helpmenu = Menu(menubar, tearoff=0)
|
||
|
|
helpmenu.add_command(label='About', underline=0, command=self.about)
|
||
|
|
menubar.add_cascade(label='Help', underline=0, menu=helpmenu)
|
||
|
|
|
||
|
|
parent.config(menu=menubar)
|
||
|
|
|
||
|
|
#########################################
|
||
|
|
## Main draw procedure
|
||
|
|
#########################################
|
||
|
|
|
||
|
|
def _redraw(self):
|
||
|
|
canvas = self._canvas
|
||
|
|
|
||
|
|
# Delete the old DRS, widgets, etc.
|
||
|
|
if self._drsWidget is not None:
|
||
|
|
self._drsWidget.clear()
|
||
|
|
|
||
|
|
if self._drs:
|
||
|
|
self._drsWidget = DrsWidget(self._canvas, self._drs)
|
||
|
|
self._drsWidget.draw()
|
||
|
|
|
||
|
|
if self._error:
|
||
|
|
self._drsWidget = DrsWidget(self._canvas, self._error)
|
||
|
|
self._drsWidget.draw()
|
||
|
|
|
||
|
|
#########################################
|
||
|
|
## Button Callbacks
|
||
|
|
#########################################
|
||
|
|
|
||
|
|
def destroy(self, *e):
|
||
|
|
self._autostep = 0
|
||
|
|
if self._top is None:
|
||
|
|
return
|
||
|
|
self._top.destroy()
|
||
|
|
self._top = None
|
||
|
|
|
||
|
|
def prev(self, *e):
|
||
|
|
selection = self._readingList.curselection()
|
||
|
|
readingListSize = self._readingList.size()
|
||
|
|
|
||
|
|
# there are readings
|
||
|
|
if readingListSize > 0:
|
||
|
|
# if one reading is currently selected
|
||
|
|
if len(selection) == 1:
|
||
|
|
index = int(selection[0])
|
||
|
|
|
||
|
|
# if it's on (or before) the first item
|
||
|
|
if index <= 0:
|
||
|
|
self._select_previous_example()
|
||
|
|
else:
|
||
|
|
self._readingList_store_selection(index - 1)
|
||
|
|
|
||
|
|
else:
|
||
|
|
# select its first reading
|
||
|
|
self._readingList_store_selection(readingListSize - 1)
|
||
|
|
|
||
|
|
else:
|
||
|
|
self._select_previous_example()
|
||
|
|
|
||
|
|
def _select_previous_example(self):
|
||
|
|
# if the current example is not the first example
|
||
|
|
if self._curExample > 0:
|
||
|
|
self._exampleList_store_selection(self._curExample - 1)
|
||
|
|
else:
|
||
|
|
# go to the last example
|
||
|
|
self._exampleList_store_selection(len(self._examples) - 1)
|
||
|
|
|
||
|
|
def next(self, *e):
|
||
|
|
selection = self._readingList.curselection()
|
||
|
|
readingListSize = self._readingList.size()
|
||
|
|
|
||
|
|
# if there are readings
|
||
|
|
if readingListSize > 0:
|
||
|
|
# if one reading is currently selected
|
||
|
|
if len(selection) == 1:
|
||
|
|
index = int(selection[0])
|
||
|
|
|
||
|
|
# if it's on (or past) the last item
|
||
|
|
if index >= (readingListSize - 1):
|
||
|
|
self._select_next_example()
|
||
|
|
else:
|
||
|
|
self._readingList_store_selection(index + 1)
|
||
|
|
|
||
|
|
else:
|
||
|
|
# select its first reading
|
||
|
|
self._readingList_store_selection(0)
|
||
|
|
|
||
|
|
else:
|
||
|
|
self._select_next_example()
|
||
|
|
|
||
|
|
def _select_next_example(self):
|
||
|
|
# if the current example is not the last example
|
||
|
|
if self._curExample < len(self._examples) - 1:
|
||
|
|
self._exampleList_store_selection(self._curExample + 1)
|
||
|
|
else:
|
||
|
|
# go to the first example
|
||
|
|
self._exampleList_store_selection(0)
|
||
|
|
|
||
|
|
def about(self, *e):
|
||
|
|
ABOUT = (
|
||
|
|
"NLTK Discourse Representation Theory (DRT) Glue Semantics Demo\n"
|
||
|
|
+ "Written by Daniel H. Garrette"
|
||
|
|
)
|
||
|
|
TITLE = 'About: NLTK DRT Glue Demo'
|
||
|
|
try:
|
||
|
|
from six.moves.tkinter_messagebox import Message
|
||
|
|
|
||
|
|
Message(message=ABOUT, title=TITLE).show()
|
||
|
|
except:
|
||
|
|
ShowText(self._top, TITLE, ABOUT)
|
||
|
|
|
||
|
|
def postscript(self, *e):
|
||
|
|
self._autostep = 0
|
||
|
|
self._cframe.print_to_file()
|
||
|
|
|
||
|
|
def mainloop(self, *args, **kwargs):
|
||
|
|
"""
|
||
|
|
Enter the Tkinter mainloop. This function must be called if
|
||
|
|
this demo is created from a non-interactive program (e.g.
|
||
|
|
from a secript); otherwise, the demo will close as soon as
|
||
|
|
the script completes.
|
||
|
|
"""
|
||
|
|
if in_idle():
|
||
|
|
return
|
||
|
|
self._top.mainloop(*args, **kwargs)
|
||
|
|
|
||
|
|
def resize(self, size=None):
|
||
|
|
if size is not None:
|
||
|
|
self._size.set(size)
|
||
|
|
size = self._size.get()
|
||
|
|
self._font.configure(size=-(abs(size)))
|
||
|
|
self._boldfont.configure(size=-(abs(size)))
|
||
|
|
self._sysfont.configure(size=-(abs(size)))
|
||
|
|
self._bigfont.configure(size=-(abs(size + 2)))
|
||
|
|
self._redraw()
|
||
|
|
|
||
|
|
def _toggle_remove_duplicates(self):
|
||
|
|
self._glue.remove_duplicates = not self._glue.remove_duplicates
|
||
|
|
|
||
|
|
self._exampleList.selection_clear(0, 'end')
|
||
|
|
self._readings = []
|
||
|
|
self._populate_readingListbox()
|
||
|
|
self._readingCache = [None for ex in self._examples]
|
||
|
|
self._curExample = -1
|
||
|
|
self._error = None
|
||
|
|
|
||
|
|
self._drs = None
|
||
|
|
self._redraw()
|
||
|
|
|
||
|
|
def _exampleList_select(self, event):
|
||
|
|
selection = self._exampleList.curselection()
|
||
|
|
if len(selection) != 1:
|
||
|
|
return
|
||
|
|
self._exampleList_store_selection(int(selection[0]))
|
||
|
|
|
||
|
|
def _exampleList_store_selection(self, index):
|
||
|
|
self._curExample = index
|
||
|
|
example = self._examples[index]
|
||
|
|
|
||
|
|
self._exampleList.selection_clear(0, 'end')
|
||
|
|
if example:
|
||
|
|
cache = self._readingCache[index]
|
||
|
|
if cache:
|
||
|
|
if isinstance(cache, list):
|
||
|
|
self._readings = cache
|
||
|
|
self._error = None
|
||
|
|
else:
|
||
|
|
self._readings = []
|
||
|
|
self._error = cache
|
||
|
|
else:
|
||
|
|
try:
|
||
|
|
self._readings = self._glue.parse_to_meaning(example)
|
||
|
|
self._error = None
|
||
|
|
self._readingCache[index] = self._readings
|
||
|
|
except Exception as e:
|
||
|
|
self._readings = []
|
||
|
|
self._error = DrtVariableExpression(Variable('Error: ' + str(e)))
|
||
|
|
self._readingCache[index] = self._error
|
||
|
|
|
||
|
|
# add a star to the end of the example
|
||
|
|
self._exampleList.delete(index)
|
||
|
|
self._exampleList.insert(index, (' %s *' % example))
|
||
|
|
self._exampleList.config(
|
||
|
|
height=min(len(self._examples), 25), width=40
|
||
|
|
)
|
||
|
|
|
||
|
|
self._populate_readingListbox()
|
||
|
|
|
||
|
|
self._exampleList.selection_set(index)
|
||
|
|
|
||
|
|
self._drs = None
|
||
|
|
self._redraw()
|
||
|
|
|
||
|
|
def _readingList_select(self, event):
|
||
|
|
selection = self._readingList.curselection()
|
||
|
|
if len(selection) != 1:
|
||
|
|
return
|
||
|
|
self._readingList_store_selection(int(selection[0]))
|
||
|
|
|
||
|
|
def _readingList_store_selection(self, index):
|
||
|
|
reading = self._readings[index]
|
||
|
|
|
||
|
|
self._readingList.selection_clear(0, 'end')
|
||
|
|
if reading:
|
||
|
|
self._readingList.selection_set(index)
|
||
|
|
|
||
|
|
self._drs = reading.simplify().normalize().resolve_anaphora()
|
||
|
|
|
||
|
|
self._redraw()
|
||
|
|
|
||
|
|
|
||
|
|
class DrsWidget(object):
|
||
|
|
def __init__(self, canvas, drs, **attribs):
|
||
|
|
self._drs = drs
|
||
|
|
self._canvas = canvas
|
||
|
|
canvas.font = Font(
|
||
|
|
font=canvas.itemcget(canvas.create_text(0, 0, text=''), 'font')
|
||
|
|
)
|
||
|
|
canvas._BUFFER = 3
|
||
|
|
self.bbox = (0, 0, 0, 0)
|
||
|
|
|
||
|
|
def draw(self):
|
||
|
|
(right, bottom) = DrsDrawer(self._drs, canvas=self._canvas).draw()
|
||
|
|
self.bbox = (0, 0, right + 1, bottom + 1)
|
||
|
|
|
||
|
|
def clear(self):
|
||
|
|
self._canvas.create_rectangle(self.bbox, fill="white", width="0")
|
||
|
|
|
||
|
|
|
||
|
|
def demo():
|
||
|
|
examples = [
|
||
|
|
'John walks',
|
||
|
|
'David sees Mary',
|
||
|
|
'David eats a sandwich',
|
||
|
|
'every man chases a dog',
|
||
|
|
# 'every man believes a dog yawns',
|
||
|
|
# 'John gives David a sandwich',
|
||
|
|
'John chases himself',
|
||
|
|
# 'John persuades David to order a pizza',
|
||
|
|
# 'John tries to go',
|
||
|
|
# 'John tries to find a unicorn',
|
||
|
|
# 'John seems to vanish',
|
||
|
|
# 'a unicorn seems to approach',
|
||
|
|
# 'every big cat leaves',
|
||
|
|
# 'every gray cat leaves',
|
||
|
|
# 'every big gray cat leaves',
|
||
|
|
# 'a former senator leaves',
|
||
|
|
# 'John likes a cat',
|
||
|
|
# 'John likes every cat',
|
||
|
|
# 'he walks',
|
||
|
|
# 'John walks and he leaves'
|
||
|
|
]
|
||
|
|
DrtGlueDemo(examples).mainloop()
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
demo()
|