NameError: имя 'сериализаторы' не определено

Question

esal = serializers.FloatField (обязательно = False) NameError: имя 'serializers' не определено

serializers.py:

from rest_framework import serializers
from restapp.models import employee

class EmployeeSerializer(serializers.ModelSerializer):
    esal=serializers.FloatField(required=False)
    class Meta:
        model=employee
        fields='__all__'

models.py:

class employee(models.Model):
    eno = models.IntegerField()
    ename = models.CharField(max_length=60)
    esal = models.FloatField()
    eaddr = models.CharField(max_length=100)