This is intended behaviour for subvertpy - svn 1.7 makes incompatible API changes to the wc API so subvertpy.wc is disabled when built against svn 1.7. This change was also one of the main reasons bzr-svn was dropped from saucy.
The correct fix is to upload an SRU of bzr-svn to raring that adds a dependency on "libsvn1 < 1.7".
This is intended behaviour for subvertpy - svn 1.7 makes incompatible API changes to the wc API so subvertpy.wc is disabled when built against svn 1.7. This change was also one of the main reasons bzr-svn was dropped from saucy.
The correct fix is to upload an SRU of bzr-svn to raring that adds a dependency on "libsvn1 < 1.7".