1 #!/usr/bin/env python3
  2 #-*coding:utf-8-*-
  3 L=[('Bob',75),('Adam',92),('Bart',66),('Lisa',88)]
  4 def by_name(t):
  5     return t[0]
  6 def by_score(t):
  7     return t[1]
  8 L2=sorted(L,key=by_name)
  9 print(L2)
 10 L3=sorted(L,key=by_score,reverse=True)
 11 print(L3)
~