Update main.py

main.py

@@ -1,3 +1,4 @@
+import re
 pointer = 0
 cell = []
 code = ""
@@ -11,11 +12,22 @@ def main():
     global code, cell, pointer
     code = input("Enter the code: ")
     print("\n\n")
+    code=codeClear(code)
     if code != "":
         for i in range(len(code)):
             interpreter(code[i], i)
     print("\n\n")
 
+def codeClear(input):
+    """
+    Clears the code from unnecessary characters
+    """
+    pattern = "[\][\[\,\.\>\<\-\+]"
+    tmp=re.findall(pattern, input)
+    result=""
+    for i in range(len(tmp)):
+        result+=tmp[i]
+    return result
 
 def interpreter(znak, i):
     """
@@ -39,10 +51,13 @@ def interpreter(znak, i):
     match znak:
         case ">":
             pointer += 1
+            if(pointer > len(cell) - 1):
+                cell.append(0)
         case "<":
             pointer -= 1
             if pointer < 0:
                 pointer = 0
+                cell.insert(0, 0)
         case "+":
             try:
                 cell[pointer] += 1
@@ -52,25 +67,35 @@ def interpreter(znak, i):
         case "-":
             try:
                 cell[pointer] -= 1
+                if cell[pointer] < 0:
+                    cell[pointer] = 0
             except:
                 cell.append(0)
-                cell[pointer] -= 1
         case ".":
+            try:
                 if cell[pointer] == 10 or cell[pointer] == 13:
                     print("\n")
                 else:
                     print(chr(cell[pointer]), end="")
+            except:
+                cell.append(0)
+                print(chr(cell[pointer]), end="")
         case ",":
+            try:
+                cell[pointer] = ord(input("Enter a character: "))
+            except:
+                cell.append(0)
                 cell[pointer] = ord(input("Enter a character: "))
         case "[":
+            try:
                 loop_begin = i
-            loop_end = code.find("]", i)
                 if cell[pointer] != 0:
                     loop_end = code.find("]", i)
                     for a in range(0, cell[pointer]-1):
                         for j in range(1, loop_end-loop_begin):
                             interpreter(code[loop_begin + j], loop_begin + j)
-
+            except:
+                cell.append(0)
 
 if __name__ == '__main__':
     main()