Get the duplicate value on DuplicateKeyError

Question

In pymongo, when a DuplicateKeyError caught, what\'s the proper way to find out the duplicate value behind the the exception?

Currently I do this

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Answer 1

In dev version of pymongo (2.7) you can check with error_document property:

try:
    db.coll.insert({name: 'some_value'})
except pymongo.errors.DuplicateKeyError, e:
    print e.error_document

As far as I know, in 2.6 and earlier versions, all info except error msg and code is discarded.