[中文]

用途:

• 获取指定垂类下消费者人群画像（即"观看该垂类视频的用户"画像）
• 与 fetch_content_author_portrait 互为补充：一个看作者，一个看观众

参数:

• tag_id: 垂类ID（必填，不支持 0=全部，需传入具体垂类 ID，可通过 fetch_item_filter_options 获取）
• period: 时间粒度，"week"=按周（end_date 必须为周日）, "month"=按月（end_date 必须为月末，如 20260331）
• end_date: 结束日期 YYYYMMDD，需与 period 对齐

返回:

• 消费者画像数据：性别分布、年龄段分布、地域分布、兴趣偏好、设备分布等

[English]

Purpose:

• Get consumer (viewer) portrait for a category (i.e. profile of users who watch videos in this category)
• Counterpart to fetch_content_author_portrait: one for creators, one for viewers

Parameters:

• tag_id: Category ID (required, does NOT support 0=all, must pass a specific category ID)
• period: "week" (end_date must be a Sunday) or "month" (end_date must be month-end, e.g. 20260331)
• end_date: End date YYYYMMDD, must align with period

Return:

• Consumer portrait: gender, age group, region, interest, device distributions

[示例/Example]

tag_id = "601" period = "month" end_date = "20260331"