How to replace values in a list at indexed positions?

wxPython Users
1

I have following list of text positions with all values being set to ‘-999’ as default:

List = [(70, 55), (170, 55), (270, 55), (370, 55),

(70, 85), (170, 85), (270, 85), (370, 85)]

for val in List:

self.depth = wx.TextCtrl(panel, -1, value=’-999’, pos=val, size=(60,25))

I have indexed list and corresponding values at them such as:

indx = [‘2’,‘3’]

val = [‘3.10’,‘4.21’]

I want to replace index locations ‘2’ and ‘3’ with values ‘3.10’ and ‘4.21’ respectively in ‘List’ and keep the rest as ‘-999’. Any suggestions?

2

I have following list of text positions with all values being set to '-999'
as default:

        List = [(70, 55), (170, 55), (270, 55), (370, 55),
                (70, 85), (170, 85), (270, 85), (370, 85)]

        for val in List:
            self.depth = wx.TextCtrl(panel, -1, value='-999', pos=val,
size=(60,25))

I have indexed list and corresponding values at them such as:

        indx = ['2','3']
        val = ['3.10','4.21']

I want to replace index locations '2' and '3' with values '3.10' and '4.21'
respectively in 'List' and keep the rest as '-999'. Any suggestions?

Hi,
to manipulate the list elements, you can set directly the respective
positions (zero-based).

lst = list("ABCDEF")
lst

['A', 'B', 'C', 'D', 'E', 'F']

lst[2] = "CCCCCC"
lst

['A', 'B', 'CCCCCC', 'D', 'E', 'F']

however, if you need to work with multiple texctrl widgets, you need
to reference them in some way - either via variables
textctrl_0 = wx.TextCtrl(...)
textctrl_1 = wx.TextCtrl(...)

...

textctrl_1.SetValue(...)

if there are many widgets like this, you can collect them in a dict or
a list and access them from there:

textctrls_dct = {}
textctrls_dct[0] = wx.TextCtrl(...)

textctrls_dct[0].SetValue(...)

hth,
   vbr

···

2013/12/20 Ibraheem Khan <ibraheem.khan99@gmail.com>:

3

Ibraheem Khan wrote:

I have following list of text positions with all values being set to
'-999' as default:

        List = [(70, 55), (170, 55), (270, 55), (370, 55),
                (70, 85), (170, 85), (270, 85), (370, 85)]

        for val in List:
            self.depth = wx.TextCtrl(panel, -1, value='-999', pos=val,
size=(60,25))

I have indexed list and corresponding values at them such as:

        indx = ['2','3']
        val = ['3.10','4.21']

I want to replace index locations '2' and '3' with values '3.10' and
'4.21' respectively in 'List' and keep the rest as '-999'. Any
suggestions?

Why are the indx values strings? I think you probably want integers
there. Also, if those two lists are associated with each other, then
you should probably make it a dictionary instead of two lists. For example:

    vals = { 2: '3.10', 3: '4.21' }

In any case, here's a sample:
    indx = [2 ,3]
    val = ['3.10', '4.21']
    for i,v in zip(indx,val):
        self.depth[i].SetValue( v )

···

--
Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.