
from operator import itemgetter
#按名字排序
L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]
def by_name(t):
return t
L3 = sorted(L, key=lambda x:x[0])
L2 = sorted(L, key=by_name)
print(L3)
print(L2)
#按学分排序
def by_score(t):
return t[1]
L3 = sorted(L, key=lambda x:x[1])
L2 = sorted(L, key=by_score)
print(L3)
print(L2)



