Wikidata:Pywikibot - Python 3 Tutorial/Setting qualifiers

This chapter will introduce the concept of adding, removing and modifying qualifiers.

Danger ZoneEdit

Make sure before running the examples that the bot is editing test.wikidata.org.

Check your user-config.py

family = 'wikidata'
mylang = 'test'
usernames['wikidata']['test'] = u'YOUR_BOT_OR_USER_NAME'

Check your login (note the wikidata:test):

$ python3 pwb.py login
Logged in on wikidata:test as YOUR_BOT_OR_USER_NAME.

Then make sure that each script calls the test-site:

site = pywikibot.Site("test", "wikidata")

All examples use the Wikidata Sandbox (Q4115189) item to further prevent accidental vandalism to Wikidata-proper by people copy-pasting code. Because the item does not exist on test.wikidata you can just create a new item (https://test.wikidata.org/wiki/Special:NewItem) for your practice edits. If you copy-paste the examples and run them, two things might happen: You will edit Wikidata Sandbox (Q4115189) or you will see an error message of test.wikidata that tells you that the item does not exist on that site.

pywikibot.data.api.APIError: no-such-entity: Could not find such an entity (Can't access entity Q4115189, revision may have been deleted.) [help:See https://test.wikidata.org/w/api.php for API usage; messages:[{'parameters': [], 'html': {'*': 'Could not find such an entity'}, 'name': 'wikibase-api-no-such-entity'}]]

ID's of properties and values do differ between test and live, so unexpected errors (like: ValueError: wikidata:test:Q101352 is not type <class 'str'>.) may arise if you use property and qualifier ID's from live.

Simple ExampleEdit

# -*- coding: utf-8  -*-
import pywikibot
"""
Adding a qualifier to newly-created claim/statement
"""
site = pywikibot.Site("test", "wikidata")
repo = site.data_repository()
item = pywikibot.ItemPage(repo, "Q210194")

#CLAIM
claim = pywikibot.Claim(repo, u'P131') #Adding located in the administrative territorial entity (P131)
target = pywikibot.ItemPage(repo, u"Q4546") #Connecting P131 with Cambridge (Q350), who is a Q-id.
claim.setTarget(target) #Set the target value in the local object.
item.addClaim(claim, summary=u'Adding claim to Q210194') #Inserting value with summary to Q210194

#QUALIFIER
qualifier = pywikibot.Claim(repo, u'P100')
target = pywikibot.ItemPage(repo, "Q35409")
qualifier.setTarget(target)
claim.addQualifier(qualifier, summary=u'Adding a qualifier.')

Simple example on how to use addQualifier() on a newly-created claim/statement. Make your own tests to make sure that it is added right.

Adding qualifier to existing statements/claimsEdit

# -*- coding: utf-8  -*-
import pywikibot
"""
Adding a qualifier to existing claims/statements
"""
site = pywikibot.Site("test", "wikidata")
repo = site.data_repository()
item = pywikibot.ItemPage(repo, "Q210194")
item.get() #Fetch all page data, and cache it.

#QUALIFIER FOR EXISTENCE STATEMENTS/CLAIMS
qualifier = pywikibot.Claim(repo, u'P100')
target = pywikibot.ItemPage(repo, "Q35409")
qualifier.setTarget(target)
for claim in item.claims['P131']: #Finds all statements (P131)
    if 'P100' not in claim.qualifiers: #If not already exist
        claim.addQualifier(qualifier, summary=u'Adding a qualifier.') #Adding qualifier to all statements (P131)

Remove qualifier from statements/claimsEdit

With removeQualifier()Edit

# -*- coding: utf-8  -*-
import pywikibot
"""
Remove a qualifier from claims/statements
"""
site = pywikibot.Site("test", "wikidata")
repo = site.data_repository()
item = pywikibot.ItemPage(repo, "Q210194")
item.get() #Fetch all page data, and cache it.

for claim in item.claims['P131']: #Finds all statements (P131)
    if 'P100' in claim.qualifiers: #If has the qualifier we want to remove
        for qual in claim.qualifiers['P100']: #iterate over all P100
            claim.removeQualifier(qual, summary=u'Remove qualifier.') #remove P100

With removeQualifiers()Edit

# -*- coding: utf-8  -*-
import pywikibot
"""
Remove a qualifiers form claims/statements
"""
site = pywikibot.Site("test", "wikidata")
repo = site.data_repository()
item = pywikibot.ItemPage(repo, "Q210194")
item.get() #Fetch all page data, and cache it.

#DON'T program like this. It's just to show the function 'removeQualifiers()'.
claim = item.claims['P115'][0] #Claim
qual_1 = claim.qualifiers[u'P580'][0] #qualifier
qual_2 = claim.qualifiers[u'P88'][0] #qualifier
claim.removeQualifiers([qual_1, qual_2], summary=u'Removes 2 qualifiers.') #Remove both in ONE edit. Uses list.