python - Python 生成器以及如何根据字典中的键正确迭代以删除记录，该键出现在单独的列表中

Question

我是生成器概念的新手，我正在努力解决如何将我的更改应用于从 RISparser 模块返回的生成器对象中的记录。

我知道生成器一次只读取一条记录，实际上并没有将数据存储在内存中，但我很难有效地迭代它并应用我的更改。

我的更改将涉及删除没有包含在 DOI [doi_match] 列表中的 ['doi'] 值的记录。

doi_match = ['10.1002/14651858.CD008259.pub2','10.1002/14651858.CD011552','10.1002/14651858.CD011990']

从 RISparser 返回的生成器对象包含以下信息，这只是返回的 100 条记录中的前 2 条记录。我想对其进行迭代并将生成器中的 'doi': 键与 DOI 列表进行比较。

{'type_of_reference': 'JOUR', 'title': "The CoRe Outcomes in WomeN's health (CROWN) initiative: Journal editors invite researchers to develop core outcomes in women's health", 'secondary_title': 'Neurourology and Urodynamics', 'alternate_title1': 'Neurourol. Urodyn.', 'volume': '33', 'number': '8', 'start_page': '1176', 'end_page': '1177', 'year': '2014', 'doi': '10.1002/nau.22674', 'issn': '07332467 (ISSN)', 'authors': ['Khan, K.'], 'keywords': ['Bias (epidemiology)', 'Clinical trials', 'Consensus', 'Endpoint determination/standards', 'Evidence-based medicine', 'Guidelines', 'Research design/standards', 'Systematic reviews', 'Treatment outcome', 'consensus', 'editor', 'female', 'human', 'medical literature', 'Note', 'outcomes research', 'peer review', 'randomized controlled trial (topic)', 'systematic review (topic)', "women's health", 'outcome assessment', 'personnel', 'publication', 'Female', 'Humans', 'Outcome Assessment (Health Care)', 'Periodicals as Topic', 'Research Personnel', "Women's Health"], 'publisher': 'John Wiley and Sons Inc.', 'notes': ['Export Date: 14 July 2020', 'CODEN: NEURE'], 'type_of_work': 'Note', 'name_of_database': 'Scopus', 'custom2': '25270392', 'language': 'English', 'url': 'https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908368202&doi=10.1002%2fnau.22674&partnerID=40&md5=b220702e005430b637ef9d80a94dadc4'}
{'type_of_reference': 'JOUR', 'title': "The CROWN initiative: Journal editors invite researchers to develop core outcomes in women's health", 'secondary_title': 'Gynecologic Oncology', 'alternate_title1': 'Gynecol. Oncol.', 'volume': '134', 'number': '3', 'start_page': '443', 'end_page': '444', 'year': '2014', 'doi': '10.1016/j.ygyno.2014.05.005', 'issn': '00908258 (ISSN)', 'authors': ['Karlan, B.Y.'], 'author_address': 'Gynecologic Oncology and Gynecologic Oncology Reports, India', 'keywords': ['clinical trial (topic)', 'decision making', 'Editorial', 'evidence based practice', 'female infertility', 'health care personnel', 'human', 'outcome assessment', 'outcomes research', 'peer review', 'practice guideline', 'premature labor', 'priority journal', 'publication', 'systematic review (topic)', "women's health", 'editorial', 'female', 'outcome assessment', 'personnel', 'publication', 'Female', 'Humans', 'Outcome Assessment (Health Care)', 'Periodicals as Topic', 'Research Personnel', "Women's Health"], 'publisher': 'Academic Press Inc.', 'notes': ['Export Date: 14 July 2020', 'CODEN: GYNOA', 'Correspondence Address: Karlan, B.Y.; Gynecologic Oncology and Gynecologic Oncology ReportsIndia'], 'type_of_work': 'Editorial', 'name_of_database': 'Scopus', 'custom2': '25199578', 'language': 'English', 'url': 'https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908351159&doi=10.1016%2fj.ygyno.2014.05.005&partnerID=40&md5=ab5a4d26d52c12d081e38364b0c79678'}

我尝试迭代生成器并应用更改。但是有匹配的记录没有放在匹配列表中。

match = []
for entry in ris_records:
    if entry['doi'] in doi_match:
        match.append(entry)    
    else:
        del entry

关于如何正确迭代生成器的任何建议，谢谢。

标签： pythongenerator