AttributeError: 'GetKeyUnix' object has no attribute 'getcharsUnix'

Good evening, using your library I came across two errors the
1st in line 568 and 569 was about **sys.out.***** I fixed it on **sys.stdout.***** after that the error "the out argument was not found" disappeared
Еhe 2nd problem that I can't solve at the moment and to understand what can be done about it :
line 373, in getkey
for c in self.getcharsUnix(blocking):
AttributeError: 'GetKeyUnix' object has no attribute 'getcharsUnix'

I work on the Ubuntu operating system

The traceback identifies getkey at line 373 and the GetKeyUnix class; start by locating that class and reproducing the call on Ubuntu. Done means the Unix key-reading path no longer raises the missing getcharsUnix attribute, with the reported stdout/out-argument problem checked separately.

Written by the indexing model from the issue text.