Hi and thank you so much for your fast reply! That was it, I actually forgot to define which file should be opened 
So now it seems to have worked as it shows me a bunch of adresses, must be about 50 or more including privates.
So  these are all my adresses? Meaning, if it shows up a balance on one of them, its one of my adresses? Sorry, have
 no idea 

Hi Guys,

so I found this old wallet from 2012. Downloaded Bitcoin Core and waited patiently for the blockchain to
sync. Unfortunately Bitcoin Core was running in pruning mode so now it doesnt let me open my wallet.dat, instead
it creates a new one. Since my internet connection is terrible and I dont have enough space on my
harddrive, I wanted to try out pywallet to check, if there is any balances on the wallet.

I installed python and put the wallet.dat and the pywallet.py files in the same folder (C:\Python27\).
Problem is, when I navigate to the folder in cmd and then use the command "python pywallet.py --dumpwallet --datadir=. > wallet.txt"
it creates a .txt that only includes the pywallet options instead of my public keys.

What am I doing wrong? Also, I'm a complete python noob.

Many thanks in advance!