There is a simplified version of xml:

<items> <item> <eissn>12-12</eissn> </item> <item> <eissn>11-13</eissn> <issn>11-12</issn> </item> <item> </item> </items>

I need to extract all issn and eissn, but if neither one nor the other is present, this line should not exist at all. And if there is both issn and eissn, then the priority should be issn. Expected option:

 #1105: Статья в журнале #963: 12-12 ***** #1105: Статья в журнале #963: 11-12 ***** #1105: Статья в журнале *****

With this feature, I get issn and eissn:

 def get_issn_eissn(item) -> str: return item.find("issn") or item.find("eissn") from bs4 import BeautifulSoup root = BeautifulSoup(text, 'html.parser') for item in root.select('item'): issn_eissn = get_issn_eissn(item) issn_eissn = '#963: ' + str(issn_eissn) issn_eissn = re.sub(r'\<.*?\>', '', issn_eissn) print(issn_eissn)

Please tell me how you can set the priority and if there is nothing, get:

 #1105: Статья в журнале *****

Thanks in advance for your reply.

    1 answer 1

    Head-on:

     def get_issn(item): x = item.find('issn') or item.find('eissn') return '#1105: Статья в журнале' + (f'\n#963: {x.text}' if x else '') + '\n*****' 
     In [17]: for item in root.select('item'): ...: print(get_issn(item)) ...: #1105: Статья в журнале #963: 12-12 ***** #1105: Статья в журнале #963: 11-12 ***** #1105: Статья в журнале *****
    • one
      Thank you very much!!! Everything worked !!! - Ireen1985