Fix error when the user try insert in interval.

The pointer is in stranger value because the dumps method.

main.py

@@ -17,7 +17,7 @@ class Node(object):
 
   def __init__(self):
     self.value = None
-    self.sequence = None
+    self.label = None
     self.age = None
     self.index = None
     super(Node, self).__init__()
@@ -35,24 +35,36 @@ def __init__(self):
 
   def init_file(self):
     n = Node()
-    n.method = n.value = n.sequence = n.age = n.index = ''
+    n.value = n.label = n.age = n.index = ''
     dumpped = pickle.dumps(n)
     obj_size = sys.getsizeof(dumpped)
+    self.open_file()
     self.file.seek(self.SIZE_OF_FILE * obj_size)
     self.close_file()
 
+  def create_file(self):
+    self.file = file(self.filename, 'w+b')
+    # self.open_file()
+    # self.file.seek(0)
+    # THE FLAG WILL POIN TO LAST REGISTER POSSIBLE IN FILE
+    # self.file.write('%s' % self.SIZE_OF_FILE)
+    # self.close_file()
+
   def main(self):
-    method = raw_input()
-    self.filename = 'lisch.dat' if method == 'l' else 'eisch.dat'
-    self.open_file()
-    self.init_file()
+    self.method = raw_input()
+    self.filename = 'lisch.dat' if self.method == 'l' else 'eisch.dat'
+    if not os.path.exists(self.filename):
+      self.create_file()
+      self.init_file()
 
     operation = raw_input()
     while operation != 'e':
       if operation == 'i':
         self.insert_record()
       elif operation == 'c':
         self.query()
+      elif operation == 'r':
+        self.remove()
       operation = raw_input()
     return
 
@@ -64,33 +76,38 @@ def solve_colision(self):
 
   def point_to_value(self, value):
     """ This method point to index in a file """
-
+    self.file.seek(0)
     value = int(value)
     index = self.mod(value)
     length = 211 if index > 1 else 1 # TODO - Change 211 to global dynamic variable
-    self.file.seek(index * length)
+    self.file.seek(index * length) # + len(str(self.SIZE_OF_FILE))
 
   def insert_record(self):
     # if os.path.getsize(self.filename) >= self.SIZE_OF_FILE:
     #   print 'Arquivo cheio'
-    self.open_file()
 
     value = raw_input()
-    sequence = raw_input()
+    label = raw_input()
     age = raw_input()
     n = Node()
     n.value = value
-    n.sequence = sequence
+    n.label = label
     n.age = age
-
+    self.open_file()
     if self.file:
       self.point_to_value(n.value)
-      if self.file.read() != '': # ie, if has colision
+      obj = None
+      try:
+        obj = pickle.loads(self.file.read())
+      except Exception:
+        pass
+      if obj: # ie, if has colision
         print 'chave ja existente: %s' % n.value
         self.solve_colision()
       else:
+        self.point_to_value(n.value)
         self.file.write(pickle.dumps(n))
-        self.close_file()
+      self.close_file()
 
   def query(self):
     self.open_file()
@@ -101,17 +118,21 @@ def query(self):
     # TODO, Implements when the position doesn't exist
     try:
       obj = pickle.loads(self.file.read())
-    except IOError:
+    except Exception:
       print u'chave não encontrada: %s' % value
-      return
 
     if obj:
       print 'chave: %s' % obj.value
-      print 'self.sequence: %s' % obj.sequence
-      print 'self.age %s' % obj.age
+      print obj.label
+      print obj.age
+    self.close_file()
+
+  def remove(self):
+    value = raw_input()
+    pass
 
   def open_file(self):
-    self.file = open(self.filename, 'rb+')
+    self.file = open(self.filename, 'r+b')
 
   def close_file(self):
     if self.file: