data = {
         "name": "deep",
         "age": 21,
         "roll_no": 114
       }
  class Student:
  def __init__(self,name,age,roll_no):
    self.name = name
    self.age = age
    self.roll_no = roll_no
  @classmethod
  def from_dicts(cls, data):
    students = []
    for row in data:
      student = cls(row['name'], row['age'], row['roll_no'])
      students.append(student)
    return students