python programming help

rafaellasav at gmail.com rafaellasav at gmail.com
Sun Dec 8 19:32:31 CET 2013


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 



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