-
Notifications
You must be signed in to change notification settings - Fork 0
/
pda.py
360 lines (266 loc) · 13.5 KB
/
pda.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
'''
Final work of LFA
Members:
Santiago Cardoso
Lucas Gabriel
'''
# Imports
import platform
import sys
import json
import time
import keyboard
# Recustion limit
sys.setrecursionlimit(4000)
# Set json file to open
automaton_input = "automaton1.json"
# Write DOT file
def format_transition(transition):
symbol_read = "ε" if transition.symbol_read == "" else transition.symbol_read
symbol_top_pull = "ε" if transition.symbol_top_pull == "" else transition.symbol_top_pull
symbol_push = "ε" if transition.symbol_push == "" else transition.symbol_push
return f'{symbol_read},{symbol_top_pull},{symbol_push}'
def generate_dot_format(states, start_state, final_states, currently_transition):
dot = ['digraph G {', 'rankdir = LR;', 'size = "8.5"', '', 'node [shape = none]; qi', 'node [shape = circle];', '', 'qi -> ' + start_state.get_name() + ';']
string = "node [shape = doublecircle];"
for final in final_states:
string += f"{final.get_name()}; "
dot.insert(3, string)
for state in states:
for transition in state.get_transitions():
next_state = transition.state
label = format_transition(transition)
if transition == currently_transition:
dot.append(f'{state.get_name()} -> {next_state} [label = "{label}" color = "red"];')
else:
dot.append(f'{state.get_name()} -> {next_state} [label = "{label}"];')
dot.append('}')
return '\n'.join(dot)
def update_transition(dot):
# Select all content (Ctrl+A)
keyboard.press_and_release('ctrl+a')
# Erase the selected content with the key delete
keyboard.press_and_release('delete')
keyboard.write(dot)
time.sleep(3) # Wait 3 seconds (can be adjusted)
#keyboard.press_and_release('alt+f4') # Close Edge
# Free keyboard resources
keyboard.unhook_all()
# Classes
class Transition:
def __init__(self, symbol_read, symbol_top_pull, symbol_push, state):
self.symbol_read = symbol_read
self.symbol_top_pull = symbol_top_pull
self.symbol_push = symbol_push
self.state = state
def __str__(self):
return f"Transition=('{self.symbol_read}','{self.symbol_top_pull}','{self.symbol_push}',next_state='{self.state}')"
class State:
def __init__(self, name, transitions, stack):
self.name = name
self.transitions = transitions
self.stack = stack
def __str__(self):
transitions_str = ",".join(map(str, self.transitions))
return f"State=({self.name}=([{transitions_str}],stack={self.stack}))"
def get_transitions(self):
return self.transitions
def get_name(self):
return self.name
class AutomatonStack:
def __init__(self, start_state, states, final_state, input, stack):
self.start_state = start_state
self.states = states
self.final_state = final_state
self.input = input
self.stack = stack
self.accept = False
def __str__(self):
return f"M=({self.start_state},{self.input},{self.states},{self.final_state},{self.stack})"
def read_input(self):
current_transitions = self.start_state.transitions
current_state = self.start_state
count_letters = 0
print(f"Start stack = {self.stack}")
for letter in self.input:
count_letters += 1
empty_movement = False
for transition in current_transitions:
if transition.symbol_read == "":
empty_movement = True
if not transition.symbol_push and not transition.symbol_top_pull:
break
elif transition.symbol_push and not transition.symbol_top_pull:
self.stack.append(transition.symbol_push)
if len(self.stack) == 0:
break
elif transition.symbol_top_pull == self.stack[-1] and not transition.symbol_push:
self.stack.pop()
elif transition.symbol_push and transition.symbol_top_pull == self.stack[-1]:
self.stack.pop()
self.stack.append(transition.symbol_push)
print(f"at {current_state.get_name()}\nletter read = ε\ngo to {transition.state}")
print(f"Stack = {self.stack}\n")
break
if empty_movement:
print("-------------------------------")
print(f"Empty movement!\n")
dot = generate_dot_format(self.states, self.states[0], self.final_state, transition)
update_transition(dot)
new_input = self.input[count_letters - 1:]
new_stack = self.stack.copy()
for state in self.states:
if transition.state == state.get_name():
new_start_state = state
new_automaton = AutomatonStack(new_start_state, self.states, self.final_state, new_input, new_stack)
new_automaton.read_input()
if(new_automaton.accept == False):
print("Stack deleted!")
print(f"-------------------------------\n")
if new_automaton.accept:
self.accept = True
return
for transition in current_transitions:
# Does not remove anything from the top but puts something on the stack
if transition.symbol_read == letter and transition.symbol_top_pull == "":
self.stack.append(transition.symbol_push)
break
# Neither remove nor add anything, just read the input
elif transition.symbol_top_pull == "" and transition.symbol_push == "":
break
elif len(self.stack) == 0 and transition.symbol_top_pull != "":
print(f"at {current_state.get_name()}\nletter read = {letter}\ngo to {transition.state}")
print(f"Stack = {self.stack}\n")
return
# Just remove and don't put anything on the stack
elif transition.symbol_read == letter and self.stack[-1] == transition.symbol_top_pull and transition.symbol_push == "":
self.stack.pop()
break
# Take something out and put something in
elif transition.symbol_read == letter and self.stack[-1] == transition.symbol_top_pull:
self.stack.pop()
self.stack.append(transition.symbol_push)
break
elif transition == current_transitions[-1]:
print(f"at {current_state.get_name()}\nletter read = {letter}\ngo to {transition.state}")
print(f"Stack = {self.stack}\n")
return
if len(current_transitions) == 0:
print(f"{current_state} dont have more transitions")
return
print(f"at {current_state.get_name()}\nletter read = {letter}\ngo to {transition.state}")
print(f"Stack = {self.stack}\n")
dot = generate_dot_format(self.states, self.states[0], self.final_state, transition)
update_transition(dot)
next_state = transition.state
for state in self.states:
if next_state == state.name:
current_transitions = state.transitions
current_state = state
break
#empty movement at the end of the word
for transition in current_transitions:
if transition.symbol_read == "":
empty_movement = True
#&,&,& &,&,a &,a,& &,a,a
if not transition.symbol_push and not transition.symbol_top_pull:
break
elif transition.symbol_push and not transition.symbol_top_pull:
self.stack.append(transition.symbol_push)
if len(self.stack) == 0:
break
elif transition.symbol_top_pull == self.stack[-1] and transition.symbol_push == "":
self.stack.pop()
elif transition.symbol_push and transition.symbol_top_pull == self.stack[-1]:
self.stack.pop()
self.stack.append(transition.symbol_push)
print(f"{transition.state}\nletter read = ε")
print(f"Stack = {self.stack}\n")
dot = generate_dot_format(self.states, self.states[0], self.final_state, transition)
update_transition(dot)
break
if len(self.stack) == 0 and count_letters == len(self.input):
import tkinter as tk
from tkinter import messagebox
# Crie uma janela principal (pode ser invisível)
root = tk.Tk()
root.withdraw() # Torna a janela invisível
# Exiba uma caixa de diálogo de aviso
messagebox.showinfo(":D", "Word accepted!")
print(f"Word accepted!\nStack = {self.stack}")
self.accept = True
return
# Read JSON file
with open(automaton_input, 'r') as file:
data = json.load(file)
states_data = data["pda"]["states"]
stack = []
states = []
for state_name, state_data in states_data.items():
transitions = []
for transition_data in state_data[0:]:
label_parts = transition_data["label"].split(',')
transitions.append(Transition(
symbol_read = label_parts[0],
symbol_top_pull = label_parts[1],
symbol_push = label_parts[2],
state = transition_data["next"],
))
# print(f"{label_parts[0]},{label_parts[1]},{label_parts[2]}")
states.append(State(
name = state_name,
transitions = transitions,
stack = stack
))
# Define the input
input_string = data["tests"]["accept"]
# Define the start state and final states
final_states = []
for state in states:
if state.get_name() == data["start"]:
start_state = state
if state.get_name() in data["final"]: # Still is only one state, it needs to be a list of final states
final_states.append(state)
# Assuming you have already defined start_state, states, and final_states
dot_format = generate_dot_format(states, start_state, final_states, currently_transition = "")
# Opening the website
if platform.system() == "Windows":
keyboard.press_and_release('win+r')
time.sleep(1) # Wait for the dialog box "executar" to show up
keyboard.write('msedge')
keyboard.press_and_release('enter')
time.sleep(3) # Wait for Edge to open
# Type the URL link and press enter
link_url = 'https://dreampuf.github.io/GraphvizOnline/#digraph%20G%20%7B%0A%0A%20%20subgraph%20cluster_0%20%7B%0A%20%20%20%20style%3Dfilled%3B%0A%20%20%20%20color%3Dlightgrey%3B%0A%20%20%20%20node%20%5Bstyle%3Dfilled%2Ccolor%3Dwhite%5D%3B%0A%20%20%20%20a0%20-%3E%20a1%20-%3E%20a2%20-%3E%20a3%3B%0A%20%20%20%20label%20%3D%20%22process%20%231%22%3B%0A%20%20%7D%0A%0A%20%20subgraph%20cluster_1%20%7B%0A%20%20%20%20node%20%5Bstyle%3Dfilled%5D%3B%0A%20%20%20%20b0%20-%3E%20b1%20-%3E%20b2%20-%3E%20b3%3B%0A%20%20%20%20label%20%3D%20%22process%20%232%22%3B%0A%20%20%20%20color%3Dblue%0A%20%20%7D%0A%20%20start%20-%3E%20a0%3B%0A%20%20start%20-%3E%20b0%3B%0A%20%20a1%20-%3E%20b3%3B%0A%20%20b2%20-%3E%20a3%3B%0A%20%20a3%20-%3E%20a0%3B%0A%20%20a3%20-%3E%20end%3B%0A%20%20b3%20-%3E%20end%3B%0A%0A%20%20start%20%5Bshape%3DMdiamond%5D%3B%0A%20%20end%20%5Bshape%3DMsquare%5D%3B%0A%7D'
keyboard.write(link_url)
keyboard.press_and_release('enter')
time.sleep(10)
# Simulate shift press
keyboard.press_and_release('tab')
keyboard.press_and_release('tab')
# Select all content (Ctrl+A)
keyboard.press_and_release('ctrl+a')
# Erase the selected content with the key delete
keyboard.press_and_release('delete')
keyboard.write(dot_format)
# Close the program after a while
time.sleep(5) # Wait 5 seconds (can be adjusted)
#keyboard.press_and_release('alt+f4') # Close Edge
# Free keyboard resources
keyboard.unhook_all()
elif platform.system() == "Linux":
print("Still no suport for Linux platform!\nAccepted platforms: Windows")
else:
print("Still no suport for other platforms!\nAccepted platforms: Windows")
# Create the automaton
automaton = AutomatonStack(start_state, states, final_states, input_string, stack)
automaton.read_input()
if(automaton.accept == False):
import tkinter as tk
from tkinter import messagebox
# Crie uma janela principal (pode ser invisível)
root = tk.Tk()
root.withdraw() # Torna a janela invisível
# Exiba uma caixa de diálogo de aviso
messagebox.showerror(":(", "Word denied!")
print("Word denied!")