Django使用API接口实现 表1:篮球,足球,乒乓球,羽毛球 表2:姓名,密码,爱好,邮箱 表3:表1_id,表2_id 需求利用表1"篮球","足球","乒乓球","羽毛球"等标签对表2多个用户的"爱好"进行打标签

可以使用Django中的REST framework来实现API接口，具体步骤如下：

1.创建Django项目及应用

2.定义数据模型：

class Sport(models.Model):
    name = models.CharField(max_length=20)

class User(models.Model):
    name = models.CharField(max_length=20)
    password = models.CharField(max_length=20)
    hobbies = models.CharField(max_length=50)
    email = models.CharField(max_length=50)

class Tag(models.Model):
    sport = models.ForeignKey(Sport, on_delete=models.CASCADE)
    user = models.ForeignKey(User, on_delete=models.CASCADE)

3.定义序列化器，用于将数据进行序列化和反序列化：

class SportSerializer(serializers.ModelSerializer):
    class Meta:
        model = Sport
        fields = ('id', 'name')

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('id', 'name', 'password', 'hobbies', 'email')

class TagSerializer(serializers.ModelSerializer):
    sport_name = serializers.ReadOnlyField(source='sport.name')
    user_name = serializers.ReadOnlyField(source='user.name')

    class Meta:
        model = Tag
        fields = ('id', 'sport', 'sport_name', 'user', 'user_name')

4.定义视图：

class SportViewSet(viewsets.ModelViewSet):
    queryset = Sport.objects.all()
    serializer_class = SportSerializer

class UserViewSet(viewsets.ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserSerializer

class TagViewSet(viewsets.ModelViewSet):
    queryset = Tag.objects.all()
    serializer_class = TagSerializer
    filter_fields = ('sport__name', 'user__name')

5.配置路由，关联视图：

router = routers.DefaultRouter()
router.register(r'sports', SportViewSet)
router.register(r'users', UserViewSet)
router.register(r'tags', TagViewSet)

urlpatterns = [
    url(r'^', include(router.urls)),
]

6.使用curl或其他API测试工具，调用API接口进行测试。

注意：在开发API接口时，需要保证接口的安全性和合法性，避免出现数据泄露和非法访问等问题。