strike project django serializer file

 from rest_framework import serializers

class UserSelectedSerializer(serializers.Serializer):

    symbol = (serializers.CharField(required=True),)

    instrument = (serializers.CharField(required=True),)

    strikeprice = serializers.IntegerField(required=True)

    option_type = (serializers.CharField(required=True),)

    expiery = (serializers.DateField(required=True),)

    start_date = (serializers.DateField(required=True),)

class GetNearestStrike(serializers.Serializer):

    symbol=(serializers.CharField(required=True),)

    monthly_exp = (serializers.DateField(required=True),)

    multiplier= serializers.IntegerField(required=True)

    selected_exp = (serializers.DateField(required=True),)

    instrument= (serializers.CharField(required=True),)

    start_date = (serializers.DateField(required=True),)

class GetTrendingStrike(serializers.Serializer):

    symbol=(serializers.CharField(required=True),)

    monthly_exp= (serializers.DateField(required=True),)

    selected_exp= (serializers.DateField(required=True),)

    instrument= (serializers.CharField(required=True),)

    start_date= (serializers.DateField(required=True),)