Добавил sub и unsub

SpreadsheetsService/models/student.py

@@ -4,13 +4,16 @@ from .assignment import Assignment
 class Student(dict):
     """Позволяет выполнять операции над студентами."""
 
-    def __init__(self, number: int, name: str, group_id: str, tg_id: int = None, subjects: list = None):
+    def __init__(self, number: int, name: str, group_id: str, 
+                    tg_id: int = None, subjects: list = None,
+                    is_subbed: bool = False):
         self.number: int = number
         self.name: str = name
         self.group_id: str = group_id
         self.tg_id: int = tg_id
         self.subjects = subjects
         self.assignments = []
+        self.is_subbed = is_subbed
 
         dict.__init__(
             self,
@@ -19,6 +22,7 @@ class Student(dict):
             group_id=self.group_id,
             tg_id=self.tg_id,
             assignments=self.assignments,
+            is_subbed=self.is_subbed
         )
 
     def add_assignment(self, assignment: Assignment):