空的 pubmed 搜索词和 query_key - 无事可做

Question

我正在使用下面的代码从化合物列表中搜索 pubmed。 我有兴趣获得 pmid、文章标题、期刊和摘要。 我是 R 人，但在这种情况下必须使用 python。 当我运行代码时，出现以下错误：

RuntimeError: Empty term and query_key - nothing todo


from Bio import Entrez
import pandas

# gives a list of Citation IDs in response to a search word
def search(query):
    Entrez.email = 't@gmail.com'
    handle = Entrez.esearch(db='pubmed',
                            sort='relevance',
                            retmax='15',
                            retmode='xml',
                            datatype = 'pdat',
                            term=(query)
                            )
    results = Entrez.read(handle)
    return results

# Fetch the details for all the retrieved articles via the fetch utility.
def fetch_details(id_list):
    ids = ','.join(id_list)
    Entrez.email = 't@gmail.com'
    handle = Entrez.efetch(db='pubmed',
                           retmode='xml',
                           id=ids)
    results = Entrez.read(handle)
    return results

if __name__ == '__main__':
    results = search('fever')
    id_list = results['IdList']
    papers = fetch_details(id_list)

df_list = []

num_unique=unique_names_df.shape[0]

for i in range(num_unique):
    query=unique_names_df.loc[i,'IUPACName']

#for index, row in props_df.iterrows():
#    print (row['IUPACName'])

## PUT YOUR SEARCH TERM HERE ##
#    query = row['IUPACName']
    papers=search(query)

    pmid = []
    title = []
    pubyear = []
    abstract = []

for i, paper in enumerate(papers['PubmedArticle']):
    try:
        pm = paper['MedlineCitation']['PMID']
        tit = paper['MedlineCitation']['Article']['ArticleTitle']
        pbyr = paper['MedlineCitation']['Article']['Journal']['JournalIssue']['PubDate']['Year']
        ab = paper['MedlineCitation']['Article']['Abstract']['AbstractText']
    except KeyError as e:
        continue
    pmid.append(str(pm))
    title.append(tit)
    pubyear.append(pbyr)
    abstract.append(str(ab))

# create empty dataframe
paper_df = pandas.DataFrame()

# add the PMID, Title, Publication Year, and Abstract columns
paper_df['Article_PMID'] = pmid
paper_df['Article_Title'] = title
paper_df['Publication_Year'] = pubyear
paper_df['Article_Abstract'] = abstract

#Add the query to the first column
paper_df.insert(loc=0,  column='Query', value=query)

paper_df.head(10)

#Append results to dataframe
df_list.append(paper_df)

我认为这个错误意味着搜索字符串没有结果。 关于如何处理这个问题的任何想法？ 谢谢！