在while循环中无法正常识别输入

Question

有时，我必须在控制台中引入两次输入，以使我的while循环能够识别它。代码真的很简单，我似乎找不到发生这种情况的原因。

我尝试过更改语法，并修改了while循环，但是结构仍然如此简单，不应失败。每次我遇到相同的错误，即使控制台无法识别它。

note_dict = {
    "F2": 1,
    "F#2": 2,
    "Gb2": 2,
    "G2": 3,
    "G#2": 4,
    "Ab2": 4,
    "A2": 5,
    "A#2": 6,
    "Bb2": 6,
    "B2": 7,
    "C3": 8
}
bases = []
print("Introduce your inputs: (Write exit to finish) \n")

while True:
    base = input("")
    if base == "exit":
        break
    if base in note_dict:
        bases.append(note_dict[base])
        continue
    else:
        print("Not recognized")
        continue


print(bases)

预期是这样的（在控制台中）：

Introduce your inputs: (Write exit to finish)

Bb2
B2
C3
C4
Not recognized
exit
[6, 7, 8]

我通常（在控制台中）得到的东西：

Introduce your inputs: (Write exit to finish)
Bb2
B2
C3
C4
C4
Not recognized <- Had to write it twice to say that
exit
exit <- Again, it didn't recognize it until the second time
[6, 8] <- The results aren't even right...