Question

我正在使用python 2.7并在

处出现错误

打印'Article ID：'，paper ['MedlineCitation'] ['PMID']

错误是TypeError

商品ID：追溯（最近一次通话）：在第44行的“ F：/Practicals/Pubmed/pubmed-master/pubmed-master/scrap_pubmed.py”文件中打印“文章ID：”，论文['MedlineCitation'] ['PMID'] TypeError：字符串索引必须为整数

if __name__ == '__main__':
    print "Enter keyword to search for: "
    keyword = raw_input()
    print "Enter number # of articles to fetch (number): "
    number_of_articles = raw_input()
    results = search(keyword, number_of_articles)
    id_list = results['IdList']
    papers = fetch_details(id_list)
    filename = 'pubmed.txt'
    target = open(filename, 'w')

    for i, paper in enumerate(papers):
        number_of_authors = 0
        print 'Article ID: ', paper['MedlineCitation']['PMID']
        target.write('Article ID: ' + paper['MedlineCitation']['PMID'] + '\n')

        print 'ISSN No: ', paper['MedlineCitation']['Article']['Journal']['ISSN']
        target.write('ISSN No: ' + paper['MedlineCitation'][
                     'Article']['Journal']['ISSN'] + '\n')

Answer 1

这是因为您循环错误。

您必须通过将el作为键来访问字典对象。

赞：

  for i, paper in enumerate(papers):
    print papers[paper][0]['MedlineCitation']['PMID']

TypeError：字符串索引必须为整数Python 2

1 个答案: