要按关键词采集阿里巴巴商品，你需要使用1688API接口。以下是一个简单的Python示例，展示了如何使用requests库调用阿里巴巴API并解析返回的数据：

# coding:utf-8
"""
Compatible for python2.x and python3.x
requirement: pip install requests
"""
from __future__ import print_function
import requests
# 请求示例 url 默认请求参数已经做URL编码
url = "https://item_search/?key=<您自己的apiKey>&secret=<您自己的apiSecret>&q=女装&start_price=0&end_price=0&page=1&cat=0&discount_only=&sort=&page_size=40&seller_info=no&nick=&seller_info=&nick=&ppath=&imgid=&filter="
headers = {"Accept-Encoding": "gzip","Connection": "close"
}
if __name__ == "__main__":r = requests.get(url, headers=headers)json_obj = r.json()print(json_obj)

请注意，你需要先获取Api Key和Api Secret。此外，你还需要根据1688阿里巴巴文档生成签名（sign）。

这个示例仅用于演示目的，实际使用时请参考1688API文档以获取更多详细信息和正确处理错误。

API接口请求响应示例

{"items": {"page": "1","real_total_results": 1900,"total_results": 1900,"page_size": 19,"pagecount": 100,"item": [{"title": "2019 wish 跨境秋季欧美爆板女装连衣裙 修身显瘦长款花朵吊带裙","pic_url": "https://cbu01.alicdn.com/img/ibank/2020/636/393/14247393636_846235425.jpg","promotion_price": "17.00","price": "17.00","sales": 7000,"num_iid": "45566582412","tag_percent": "58.6%","area": "广州市","detail_url": "https://detail.1688.com/offer/45566582412.html"},{"title": "连衣裙女2021春夏新款系带泡泡袖显瘦收腰碎花短裙外贸女装批发","pic_url": "https://cbu01.alicdn.com/img/ibank/2020/854/650/22828056458_1179464981.jpg","promotion_price": "17.00","price": "17.00","sales": 140000,"num_iid": "631485240015","tag_percent": "25.5%","area": "普宁市","detail_url": "https://detail.1688.com/offer/631485240015.html"},{"title": "跨境电商ebay热卖欧美女装性感手工钩织流苏休闲套装泳装罩衫 5星","pic_url": "https://cbu01.alicdn.com/img/ibank/2020/875/994/16281499578_212653647.jpg","promotion_price": "50.00","price": "50.00","sales": 5000,"num_iid": "619158432168","tag_percent": "52%","area": "晋江市","detail_url": "https://detail.1688.com/offer/619158432168.html"},{"title": "2021亚马逊跨境欧美春夏女装亚马逊宽松纯色印花无袖休闲套装现货","pic_url": "https://cbu01.alicdn.com/img/ibank/O1CN01KeBeft1fDgDqEAbLX_!!1795473973-0-cib.jpg","promotion_price": "42.00","price": "42.00","sales": 50000,"num_iid": "635637669426","tag_percent": "50.7%","area": "广州市","detail_url": "https://detail.1688.com/offer/635637669426.html"},{"title": "2021欧美春夏女装亚马逊独立站wish新品女透明网纱印花性感两件套","pic_url": "https://cbu01.alicdn.com/img/ibank/O1CN01jErYe826CIe9HUGim_!!6000000007625-0-cib.jpg","promotion_price": "37.00","price": "37.00","sales": 20000,"num_iid": "635021107526","tag_percent": "40.9%","area": "广州市","detail_url": "https://detail.1688.com/offer/635021107526.html"},{"title": "实拍韩国2021夏季新款女装韩版宽松几何印花短袖T恤女豹纹休闲裤","pic_url": "https://cbu01.alicdn.com/img/ibank/O1CN01vVsWfj222u4XacESW_!!2206515787063-0-cib.jpg","promotion_price": "34.30","price": "34.30","sales": 4000,"num_iid": "637815988990","tag_percent": "6.4%","area": 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"https://detail.1688.com/offer/633528105461.html"},{"title": "现货 A8327 欧美女装 2021 春夏纯色多色长袖短裤运动休闲套装","pic_url": "https://cbu01.alicdn.com/img/ibank/O1CN01wT5fne1OR6Myiyev6_!!4019511701-0-cib.jpg","promotion_price": "40.00","price": "40.00","sales": 3000,"num_iid": "638597250778","tag_percent": "51.4%","area": "广州市","detail_url": "https://detail.1688.com/offer/638597250778.html"},{"title": "2021年毛衣女网红韩版女装春季短袖t恤女秋中袖打底针织衫泡泡袖","pic_url": "https://cbu01.alicdn.com/img/ibank/O1CN01j8ugIs1a2caa5B5wM_!!3249173272-0-cib.jpg","promotion_price": "26.00","price": "26.00","sales": 40000,"num_iid": "638033144991","tag_percent": "13.3%","area": "东莞市","detail_url": "https://detail.1688.com/offer/638033144991.html"},{"title": "S936欧美女装时尚印花比基尼绑带罩衫三件套连衣裙","pic_url": "https://cbu01.alicdn.com/img/ibank/O1CN01iCuTMR1D7tzQjEA9t_!!2209219760170-0-cib.jpg","promotion_price": "44.00","price": "44.00","sales": 4000,"num_iid": "638197893788","tag_percent": "51.2%","area": "泉州市","detail_url": 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