goofy shit 100

turing_machine.py

@@ -22,13 +22,23 @@ class TuringMachine:
     blank_symbol: Symbol = " "
 
     def run(
-        self, tape_input: str, max_steps: int = 10_000, verbose: bool = True
+        self,
+        tape_input: str,
+        head: int = 0,
+        max_steps: int = 10_000,
+        verbose: bool = True,
     ) -> Tuple[State, Tape]:
         tape: Tape = list(tape_input) + [self.blank_symbol] * 20
-        head = 0
         state = self.start_state
         steps = 0
 
+        # normalize head position
+        if head < 0:
+            tape = [self.blank_symbol] * (-head) + tape
+            head = 0
+        elif head >= len(tape):
+            tape += [self.blank_symbol] * (head - len(tape) + 1)
+
         def debug_print():
             tape_view = "".join(tape).replace(self.blank_symbol, "_")
             head_marker = " " * head + "^"
@@ -109,6 +119,81 @@ tm = TuringMachine(
     reject_state="reject",
 )
 
-final_state, final_tape = tm.run("00110")
+tape_input = "00110"
+final_state, final_tape = tm.run(tape_input)
 print("Final State:", final_state)
-print("Final Tape:", "".join(final_tape).strip())
+final_tape_str = "".join(final_tape).strip()
+print("Final Tape:", final_tape_str)
+
+classic: TransitionFunction = {}
+
+# ok idk
+
+classic[("want_copy", "1")] = ("past_og_1", "X", "R")
+classic[("want_copy", "0")] = ("past_og_0", "Y", "R")
+
+for sym in ["0", "1"]:
+    classic[("past_og_1", sym)] = ("past_og_1", sym, "R")
+    classic[("past_og_0", sym)] = ("past_og_0", sym, "R")
+
+classic[("past_og_1", " ")] = ("copy_1", " ", "R")
+classic[("past_og_0", " ")] = ("copy_0", " ", "R")
+
+for sym in ["0", "1"]:
+    classic[("copy_1", sym)] = ("copy_1", sym, "R")
+    classic[("copy_0", sym)] = ("copy_0", sym, "R")
+
+classic[("copy_1", " ")] = ("back", "1", "L")
+classic[("copy_0", " ")] = ("back", "0", "L")
+
+for sym in ["0", "1", " "]:
+    classic[("back", sym)] = ("back", sym, "L")
+
+for sym, target in [("X", "1"), ("Y", "0")]:
+    classic[("back", sym)] = ("want_copy", target, "R")
+
+classic[("want_copy", " ")] = ("accept", " ", "R")
+
+tm_classic = TuringMachine(
+    transition_function=classic,
+    start_state="want_copy",
+    accept_state="accept",
+    reject_state="reject",
+)
+
+final_state, final_tape = tm_classic.run(tape_input)
+print("Final State (Classic):", final_state)
+final_tape_str = "".join(final_tape).strip()
+print("Final Tape (Classic):", final_tape_str)
+
+# for now it will copy with a blank in between. so 00110 → 00110 00110, not 0011000110. but it works. and the other one works too. so that's good enough for now.
+
+left_shift_1: TransitionFunction = {}
+
+left_shift_1[("want_copy", "1")] = ("copy_1", " ", "L")
+left_shift_1[("want_copy", "0")] = ("copy_0", " ", "L")
+left_shift_1[("want_copy", " ")] = ("accept", " ", "R")
+
+for sym, target in [("copy_0", "0"), ("copy_1", "1")]:
+    # override for now, i can make a wrapping one but i wont
+    left_shift_1[(sym, "1")] = ("going_balls", target, "R")
+    left_shift_1[(sym, "0")] = ("going_balls", target, "R")
+    left_shift_1[(sym, " ")] = ("going_balls", target, "R")
+
+left_shift_1[("going_balls", " ")] = ("want_copy", " ", "R")
+
+left_shift_machine = TuringMachine(
+    transition_function=left_shift_1,
+    start_state="want_copy",
+    accept_state="accept",
+    reject_state="reject",
+)
+
+left_shift_input = "101010"
+
+left_shift_final_state, left_shift_final_tape = left_shift_machine.run(
+    left_shift_input, head=1
+)
+print("Final State (Left Shift):", left_shift_final_state)
+left_shift_final_tape_str = "".join(left_shift_final_tape).strip()
+print("Final Tape (Left Shift):", left_shift_final_tape_str)