[closed] HW- 5.4 Please Clear .

1

Hello,

Can anybody tell me how can we get the value of a <"keyword"> when we have its <"value"> ?

Till now , we been doing its reverse. So this thing is kinda new to me.

asked 24 Mar '12, 14:43

Estilo's gravatar image

Estilo
151●5●10●26
accept rate: 0%

closed 24 Mar '12, 16:07

The question has been closed for the following reason "The question is answered, right answer was accepted" by Estilo 24 Mar '12, 16:07

3 Answers:
0

Don't forget all the list handling we've been doing for a while.
Not because we now know dictionaries that everything else is not good anymore...

With a dictionary we can get the content by giving the keywork directly (dict[keyword]), which is cool, but we can still enumerate the keys as keywords in lists.

link

answered 24 Mar '12, 14:47

Angel's gravatar image

Angel
7.0k●6●32●112

edited 24 Mar '12, 15:30

But list operations are fail on dictionary.

(24 Mar '12, 14:50) Estilo Estilo's gravatar image

Hmm now that I look at it again, I must admin I used a method on the dictionary that has net been covered yet...
Which I changed after @yoshi's comment. There are similarities between lists and dictionaries.

(24 Mar '12, 14:58) Angel Angel's gravatar image
0

Try using a for loop to go through all the keywords. For some inspiration, take a look at the example given in the homework.

def courses_offered(courses, hexamester):
    res = []
    for c in courses[hexamester]:
        res.append(c)
    return res
link

answered 24 Mar '12, 15:07

yoshi's gravatar image

yoshi
4.0k●8●26●59

But this implies we have the hexamester, which we don't...

(24 Mar '12, 15:14) Angel Angel's gravatar image
1

True, but this is one level into the dictionary. You can always just do 

for hexamester in courses:

and traverse the hexamesters through that, just like you would for a list.

(24 Mar '12, 15:16) yoshi yoshi's gravatar image

Yeah! I am still not getting the idea of knowing 'keyword' when I have its 'value'. :/

(24 Mar '12, 15:17) Estilo Estilo's gravatar image

Think about it from the list point of view, how would you get all the keywords if you knew the url?

(24 Mar '12, 15:21) yoshi yoshi's gravatar image

@yoshi Doh! /facepalm
@Estilo go from what yoshi wrote (comment). Test key's value against your value....

(24 Mar '12, 15:24) Angel Angel's gravatar image
-1

OMG! Finally I got it.

:/ It took me 1 hour. One things is for sure. Dictionary is really new to me.

Thanks a lot @yoshi and @angel

link

answered 24 Mar '12, 15:32

Estilo's gravatar image

Estilo
151●5●10●26

Glad answers were helpful!

(24 Mar '12, 15:33) Angel Angel's gravatar image

I would have got it in few mins but I just ignored the main key that I was sure of . LOL

(24 Mar '12, 15:34) Estilo Estilo's gravatar image

You're welcome :)

(24 Mar '12, 15:40) yoshi yoshi's gravatar image

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Asked: 24 Mar '12, 14:43

Seen: 319 times

Last updated: 24 Mar '12, 16:07

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