根据字典值打印单数/复数

Question

favorite_languages = {'jen': ['python', 'ruby'], 'sarah': ['c'], 'edward': ['ruby', 'go'],
                  'phil': ['python', 'haskell'],}


for name, languages in favorite_languages.items():

   print("\n" + name.title() + "'s favorite languages are:")
   for language in languages:print("\t" + language.title())

output:Jen's favorite languages are:
Python
Ruby

Sarah's favorite languages are:
C
enter code here

Edward's favorite languages are:
Ruby
Go

Phil's favorite languages are:
Python
Haskell

我想显示“莎拉最喜欢的语言是”而不是“是”。 无法弄清楚如何编写 if 语句来执行此操作。

Answer 1

请尝试以下操作：

print("\n" + name.title() + "'s favorite language" + 
      ("s are:" if len(languages) > 1 else " is:"))

然后它应该打印：

Jen's favorite languages are:
    Python
    Ruby

Sarah's favorite language is:
    C

Edward's favorite languages are:
    Ruby
    Go

Phil's favorite languages are:
    Python
    Haskell

与您的问题没有直接关系，但不赞成使用+连接字符串。 有关最佳实践，请参阅此问题。

Answer 2

当前/最佳方式

for name, languages in favorite_languages.items():
  print()
  if len(languages) > 1:
    print(f"{name}'s favoutire language are")

else:
    print(f'{name} language is')


for language in languages:
     print(language)