试图得到总数，但似乎不起作用

Question

我正在学习python，正在研究这个问题，但似乎无法使它发挥作用。当这个代码被执行时，我在单独的行中得到数字1到8。我怎么能只打印8的数字呢？你知道吗

honor_roll_count = 0
student_grades = ["A", "C", "B", "B", "C", "A", "F", "B", "B", "B", "C", "A"]
for grade in student_grades:
    if grade in "AB":
        honor_roll_count = honor_roll_count + 1
        print honor_roll_count

Answer 1

honor_roll_count = 0
student_grades = ["A", "C", "B", "B", "C", "A", "F", "B", "B", "B", "C", "A"]
for grade in student_grades:
    if grade in "AB":
        honor_roll_count += 1
print honor_roll_count

Answer 2

向左移动print语句，两个缩进级别：

for grade in student_grades:
    if grade in "AB":
        honor_roll_count = honor_roll_count + 1
print honor_roll_count

现在，它将在循环完成后执行，而不是循环的每次迭代。你知道吗

Answer 3

你的print是缩进的，这意味着它在if的for循环中，所以它发生在每个“A”或“B”中。你想让它在循环之后。你知道吗

for grade in student_grades:
    if grade in "AB":
        honor_roll_count = honor_roll_count + 1
print honor_roll_count