fix for the circular import bug that prevented initialization

[wohltat]

Sorry there was a mishap while branch switching.

[lgtm-com[bot]]

This pull request introduces 1 alert and fixes 2 when merging b168528fb184492f8f2c3a6c2e20b94cb61a91c2 into 0e9012fb77245e0891d86342beb6b46011041957 - view on LGTM.com

new alerts:

• 1 for Syntax error

fixed alerts:

• 2 for Unused import

[chbergmann]

Please read the comments to your commits