為什么我的if陳述句函式只將我的列印訊息分配給python字典中的最后一個鍵值-有解無憂

favorite_languges = {
"John": "Python",
"Aisha": "C",
"Newton": "maths",
"Budon": "C  ",
}

# for loop to print all keys

for name in favorite_languges.keys():
    print(name.title())

# for loop to print message to all users in the friends list

friends = ['Budon', 'Aisha']
if name in friends:
    language = favorite_languges[name].title()
    print(f'\t{name.title()}, i see you love {language}')

我正在嘗試將訊息列印print(f'\\t{name.title()}, i see you love {language}')給好友串列和字典中的用戶，但它僅將其分配給字典中的最后一個鍵值

我試圖一次運行每一行，但我似乎沒有出路。我才練了3個月

uj5u.com熱心網友回復：

您可能只在 for 回圈通過后才運行 if 陳述句，這意味著它將始終位于陣列的最后一點，請嘗試如下：

favorite_languges = { "John": "Python", "Aisha": "C", "Newton": "maths", "Budon": "C  "}
friends = ['Budon', 'Aisha']
for name in favorite_languges.keys():
    print(name.title())
    if name in friends:
        language = favorite_languges[name].title()
        print(f'\t{name.title()}, i see you love {language}')

uj5u.com熱心網友回復：

您沒有為第二個回圈使用 for 回圈。所以你需要添加它。還有一件事：你應該檢查一個名字是否在字典中，否則你會得到一個KeyError未知名字。

favorite_languges = { "John": "Python", "Aisha": "C", "Newton": "maths", "Budon": "C  ", }

for name in favorite_languges.keys():
    print(name.title())

favorite_languges = { "John": "Python", "Aisha": "C", "Newton": "maths", "Budon": "C  ", }

for name in favorite_languges.keys():
    print(name.title())


friends = ['Budon', 'Aisha']
for name in friends:
    if name in favorite_languges:
        language = favorite_languges[name].title()
        print(f'\t{name.title()}, i see you love {language}')
    else:
        print(f"No information about {name}")

預期輸出：

John
Aisha
Newton
Budon
John
Aisha
Newton
Budon
    Budon, i see you love C  
    Aisha, i see you love C

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標籤：Python 字典 if 语句

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