دوست من فکر کنم معنی اون یعنی قابل نصب نیست
اینم خروجی دستوری که گزاشتید:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python-elementtree is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package python-elementtree has no installation candidate
همچنان منتظرم