L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]
def by_name(t): def k(s): return s[0] return sorted(t,key=k)
print(by_name(L))
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Nathan是只程序猿
L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]
def by_name(t): def k(s): return s[0] return sorted(t,key=k)
print(by_name(L))