On 08/10/15 23:17, Alan Gauld wrote:
On 08/10/15 20:40, Andrea Nguy wrote:
What’s happening is that I am trying to take a list of a list as such:
[['1', ' james', ' 1', ' 90'],
['2', ' alice', ' 1', ' 95'],
['5', ' jorgen', ' 1', ' 99’]] (it continues) from a text file.
When you say from a text file, do you mean you are reading the
values in and converting them to the appropriate types? Or are
you just adding them directly to the list? In which case they
will all be strings?
Its late so I'm not reading clearly enough. They are all strings.
So I suspect before multiplying by a float your first job is to convert
the numbers to floats(or ints) using float() (or int())
However, what I am trying to do take the indexes of thelist[0][1]
And I didn't notice this was [0,1] (' james') but read it
as [1,0] (2)
just use a for loop like this:
for sublist in thelist:
sublist[0] *= someFloat
sublist[3] *= someFloat
Which changes the values in place.
Provided its the numbers you want and you convert
them to float/int first.
Sorry for my inattention,
--
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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