gen = pagegenerators.RecentChangesPageGenerator(
    site=self.site,
    namespaces=[6],  # File namespace
    changetype="new",
    total=100
)                
        
"""Seek to first page without mediainfo."""
for page in gen:
    if not 'mediainfo' in page.latest_revision.slots:
        item = page.data_item()    
        """Get fails as there is no mediainfo."""
        item.get()

Traceback (most recent call last):
  File "/Users/kimmovirtanen/wikitech/core/tests/file_tests.py", line 400, in test_file_exist_but_without_item
    item.get()
  File "/Users/kimmovirtanen/wikitech/core/pywikibot/page/_wikibase.py", line 427, in get
    data = self.file.latest_revision.slots['mediainfo']['*']
KeyError: 'mediainfo'

gen = pagegenerators.RandomPageGenerator(total=1000, site=site, namespaces=[6])  # Namespace 6 corresponds to files

"""Seek to first pagewith  mediainfo."""
for page in gen:
    if 'mediainfo' in page.latest_revision.slots:
        item = page.data_item()
        """Get fails in first item where is no statements in mediainfo."""
        data=item.get()

Traceback (most recent call last):
  File "/Users/kimmovirtanen/pywikibot/latestfiles.py", line 23, in <module>
    data=item.get()
  File "/Users/kimmovirtanen/pywikibot/venv/lib/python3.10/site-packages/pywikibot/page/_wikibase.py", line 446, in get
    return super().get(force=force)
  File "/Users/kimmovirtanen/pywikibot/venv/lib/python3.10/site-packages/pywikibot/page/_wikibase.py", line 275, in get
    value = cls.fromJSON(self._content.get(key, {}), self.repo)
  File "/Users/kimmovirtanen/pywikibot/venv/lib/python3.10/site-packages/pywikibot/page/_collections.py", line 213, in fromJSON
    for key, claims in data.items():
AttributeError: 'list' object has no attribute 'items'
CRITICAL: Exiting due to uncaught exception AttributeError: 'list' object has no attribute 'items'

import pywikibot
site = pywikibot.Site('commons', 'commons')
page = pywikibot.FilePage(site,'Image:Montemurro1857.png')
item = page.data_item()
data=item.get()
print(data)