Re: [Tutor] __getitem__
Hi:
Thank you very much for ALL your postings. They help a lot and now things make
sense.
Thank you
Monika
-- Original Message --
From: Alan Gauld via Tutor
To: tutor@python.org
Subject: Re: [Tutor] __getitem__
Date: Wed, 23 Nov 2016 22:25:08 +
On 23/11/16 12:25, monik...@netzero.net wrote:
> I have two questions in regards to below code:
> 1. largest is a list, not a list of lists.
> [('deit', 4), ('acer', 3), ('aceilmr', 2), ('arst', 2)]
> so why when I do largest[0] I get the whole list again,
I don't know you will need to show us some real code.
Ideally input at the >>> prompt.
> 2. largest = [sorted(analist, key=lambda analist: analist[1], reverse=True)]
> brings back the same result as:
> largest = [sorted(analist, key=lambda d: d[1], reverse=True)]
> and the same result as:
> largest = [sorted(analist, key=lambda x: x[1], reverse=True)]
Yes because it doesn't matter what you call the parameter of the lambda,
it's like any other function:
def add2(x): return x+2
def add2(y): return y+2
def add2(z): return z+2
All of these functions are identical they always do the same
regardless of what you call the parameter. Remember a lambda
is just a shortcut for a function
key = lambda d: d[1]
is identical to
def key(d): return d[1]
and
key = lambda analist: analist[1]
is identical to
def key(analist): return analist[1]
Just like the add2() examples it doesn't matter what
name you use for the parameter.
> ...but where does it get the x, what is the value of x?
See my other post about how sorted() works.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos
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[Tutor] Python code
I need help to write a code for this problem. Please help Ask the user to enter a series of numbers. Stop reading numbers when they enter a negative number. Calculate the average of the numbers given not including the final negative number. Question 9 options: With best regards urfa jamil ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Python code
On 24/11/16 23:14, urfa jamil wrote: > I need help to write a code for this problem. > > Please help OK, But what exactly do you want help with? Have you written any code yet? If so show us. Also if you get an error message post it. > Ask the user to enter a series of numbers. Can you do this bit? Can you get the user to enter a single number and store it? > Stop reading numbers when they enter a negative number. Can you do this bit? > Calculate the average of the numbers given Can you calculate the average of a collection of numbers? > not including the final negative number. Can you exclude the last element? > Question 9 options: No idea what that means! -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Python code
urfa jamil writes: > I need help to write a code for this problem. We can help by discussing the solution you have written. Simply post a reply, and include the program code you wrote for solving the problem. > Please help Note that “help” is not the same as “write the solution for me”. You have to do the work yourself, and we can help by discussing what you've done. -- \ “Try to learn something about everything and everything about | `\ something.” —Thomas Henry Huxley | _o__) | Ben Finney ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
