old_contents: from sqlalchemy import (
      Column,
      Integer,
      ForeignKey,
      String
  )
  
  from devmine.app.models import Base
  
  
  class Score(Base):
      """Model of a score."""
  
      __tablename__ = 'scores'
  
      id = Column(Integer, primary_key=True)
      ulogin = Column(String,
                      ForeignKey('users.login'),
                      nullable=False)
      did = Column(Integer,
                   ForeignKey('developers.id'),
                   nullable=False)
      fname = Column(String,
                     ForeignKey('features.name'),
                     nullable=False)
      score = Column(Integer)
  
      def __init__(self):
          pass
  
new_contents: from sqlalchemy import (
      Column,
      Integer,
      ForeignKey,
      String,
      Float
  )
  
  from devmine.app.models import Base
  
  
  class Score(Base):
      """Model of a score."""
  
      __tablename__ = 'scores'
  
      id = Column(Integer, primary_key=True)
      ulogin = Column(String,
                      ForeignKey('users.login'),
                      nullable=False)
      did = Column(Integer,
                   ForeignKey('developers.id'),
                   nullable=False)
      fname = Column(String,
                     ForeignKey('features.name'),
                     nullable=False)
      score = Column(Float)
  
      def __init__(self):
          pass
  
subject: change score type from Integer to Float