python programming help

[YBM]

Le 08.12.2013 19:32, rafaellasav at gmail.com a écrit :
> On Sunday, December 8, 2013 6:27:34 PM UTC, bob gailer wrote:
>> On 12/8/2013 12:59 PM, rafaellasav at gmail.com wrote:
>>
>>> i have a dictionary with names and ages for each name. I want to write a function that takes in an age and returns the names of all the people who are that age.
>>
>>> please help
>>
>> Welcome to the python list. Thanks for posting a question.
>>
>>
>>
>> If you were hoping for one of us to write the program for you ... well
>>
>> that's not what we do on this list.
>>
>>
>>
>> Please post the code you have so far and tell us exactly where you need
>>
>> help.
>>
>>
>>
>> Also tell us what version of Python, what OS, and what you use to write
>>
>> and run Python programs.
>
> name = ['Alice', 'Bob', 'Cathy', 'Dan', 'Ed', 'Frank', 'Gary', 'Helen', 'Irene', 'Jack', 'Kelly', 'Larry']
> age = [20, 21, 18, 18, 19, 20, 20, 19, 19, 19, 22, 19]
> dic={}
> def combine_lists(name,age):
>      for i in range(len(name)):
>          dic[name[i]]= age[i]
> combine_lists(name,age)
> print dic
>
> def people(age):
>      people=lambda age: [name for name in dic if dic[name]==age]
>
> people(20)
>
>
>
>
> this is the code i have so far(with the help of the first post ;p). i understand how a function and a dictionary works and what I'm asked to find. but i don't get the lambda age part. and this code doesn't give me any result
>

You didn't write a function which return a result, so you have no
result.