使用for循环打印名称

Question

president = [('D. Trump',2017), ('Barack Obama',2009), ('B. Clinton',1993), 
             ('George W. Bush',2001)]

max_w = president[0][1]
min_w = president[0][1]

for word in president:

    if word[1] > max_w:
        max_w = word
    elif word[1] < min_w:
        min_w = word   

print(max_w, min_w)

为什么max_w和min_w是一个元组？应该是int吗？

Answer 1

我认为您希望在这些条件中使用max_w = word[1]和min_w = word[1]。

或者，您可以这样写：

for name, year in president:
    if year > max_w:
        max_w = year
    if year < min_w:
        min_w = year

或者保存初始化并执行此操作（甚至是更好的IMO）：

max_w = max(year for name, year in president)
min_w = min(year for name, year in president)