corpus summary method crashes for FreDraCor (invalid date)

[DanilSko]

I ran the following code (for demo purposes):

import pydracor
corpus = pydracor.Corpus('fre')
corpus.summary()

At the last line I had an error:
ValueError: invalid literal for int() with base 10: '1678-02-25'

I also attach a screenshot

[DanilSko]

UPD: also seems to break on GerDraCor
the Russian corpus works fine though..

[lehkost]

Has to do with the possibility to use exact premiere dates that we started to introduce a while ago (example here). We discussed the same issue regarding rdracor. The API wrappers should transform exact dates back to years.