Python 词典输出问题

Question

我是 python 和这个论坛的新手。在线学习对我不起作用，所以我不能只去找家教。这可能是我忘记的小事。我欢迎你能给我的任何帮助。

我试图让输出看起来像这样：她的名字是 Emmylou；她有望在 2021 年秋季毕业；她的账单已经付清；她的专业是考古学；她属于这些学校俱乐部——摄影、表演和欢乐合唱团

Emm = {'name' : 'Emmylou', 'graduate' : 'Fall 2021', 'bill' : 'paid', 'major' : 'Archeology', 'clubs-' : 'Photography, Acting and Glee'}

for Key, Value in Emm.items():

print(f"Her {Key} is {Value} and she is on track to {Key} in {Value}; Her {Key} is {Value}; Her {Key} is {Value}; She belongs to these school {Key} {Value}")

输出一团糟，当我运行时看起来像这样：

Her name is Emmylou and she is on track to name in Emmylou; Her name is Emmylou; Her name is Emmylou; She belongs to these school name Emmylou
Her graduate is Fall 2021 and she is on track to graduate in Fall 2021; Her graduate is Fall 2021; Her graduate is Fall 2021; She belongs to these school graduate Fall 2021
Her bill is paid and she is on track to bill in paid; Her bill is paid; Her bill is paid; She belongs to these school bill paid
Her major is Archeology and she is on track to major in Archeology; Her major is Archeology; Her major is Archeology; She belongs to these school major Archeology
Her clubs- is Photography, Acting and Glee and she is on track to clubs- in Photography, Acting and Glee; Her clubs- is Photography, Acting and Glee; Her clubs- is Photography, Acting and Glee; She belongs to these school clubs- Photography, Acting and Glee

Answer 1

在您的代码中，您将迭代数据中的每个 key-value 对；所以你最终打印了 5 次，每次都是 key-values 对，而不是打印 1 次，所有 key-value 对。

试试这个。

Emm = [
    ('name', 'Emmylou'),
    ('graduate', 'Fall 2021'),
    ('bill', 'paid'),
    ('major', 'Archeology'),
    ('clubs-', 'Photography, Acting and Glee'),
]

flat_items = [item for pair in Emm for item in pair]
print("Her {} is {} and she is on track to {} in {}; Her {} is {}; Her {} is {}; She belongs to these school {} {}".format(*flat_items))

Answer 2

首先，我假设您实际上已经在代码中缩进了 print 语句，否则它根本无法工作。

问题是对于每个循环，您在所有地方都填充了相同的 key/value 对。

根据目的，您可以通过类似的方式获得声明；

Emm = {'name' : 'Emmylou', 'graduate' : 'Fall 2021', 'bill' : 'paid', 'major' : 'Archeology', 'clubs-' : 'Photography, Acting and Glee'}
print(f"Her name is {Emm['name']} and she is on track to graduate in {Emm['graduate']}; Her major is {Emm['major']}; Her clubs - is {Emm['clubs-']}")

您在遍历字典时可能面临的另一个问题是，除非您使用 python 3.7 或更高版本，否则无法保证字典中项目的保存顺序。因此，您的 key/value 对可能不会以相同的顺序出现。

Answer 3

正如其他人告诉您的那样，您正在迭代字典，并且在每次迭代中键和值都被替换并打印在新行中。

如果想使用字典单行打印，可以尝试将字典数组转换成数组，使用format方法打印。

Emm = {
    'name' : 'Emmylou',
    'graduate' : 'Fall 2021',
    'bill' : 'paid',
    'major' : 'Archeology',
    'clubs-' : 'Photography, Acting and Glee'
}

items = []
for (key, value) in Emm.items():
    items = items + [key, value]
print("Her {} is {} and she is on track to {} in {}; Her {} is {}; Her {} is {}; She belongs to these school {} {}".format(*items))

Python 词典输出问题

Python Dictionary output issues

python

dictionary

mergeddictionaries