old_contents: from ..tools._pypairs import cyclone, sandbag
  from ..tools._phate import phate
  from ..tools._phenograph import phenograph
  
new_contents: from ..tools._pypairs import cyclone, sandbag
  from ..tools._phate import phate
  from ..tools._phenograph import phenograph
  from ..tools._palantir import palantir
  
subject: Update tl.py