Python Data Graph

Hi there,

i’m currently learning about python in general and about blender python specifically.
But i’m at the very beginning so this might not make a lot of sense.

I tried to write a little script ( that takes in a number of lists containing values from 0 to 1. These lists are wrapped into another list so that i can access this list without worrying about how many “sublists” i entered.

[SUB]# Data Source[/SUB]
[SUB]n = [ [/SUB]
[SUB][0.1, 0.5, 0.3, 1.0 , 0.7, 1.0, .5], [/SUB]
[SUB][0.5, 0.3, 0.1, 0.1, 0.2, 1.0, .5], [/SUB]
[SUB][0.1, 0.5, 0.3, 1.0 , 0.7, 1.0, .5],[/SUB]
[SUB][0.5, 0.3, 0.1, 0.1, 0.2, 1.0, .5] [/SUB]

[/SUB][SUB]index1 = 0[/SUB]
[SUB]index2 = 0[/SUB]
The next step would be to create a row of scaled cubes to represent the items in the sublists. And there should be as many rows as there are sublists in n. This works fine with this:

[SUB]# Grid Generation[/SUB]
[SUB]for i in range (0, len(n)): [/SUB]
[SUB] for j in range (0, len(n[0])): [/SUB]
[SUB] x = i [/SUB]
[SUB] y = j [/SUB]
[SUB] z = 0[/SUB]
[SUB] bpy.ops.mesh.primitive_cube_add(radius=1, view_align=False, enter_editmode=False, location=(y, x, 0))[/SUB]

[SUB] bpy.ops.transform.resize(value=(.25, .25, n[index1][index2]))[/SUB]
[SUB] bpy.ops.transform.translate(value=(0, 0, n[index1][index2]))[/SUB]

[SUB] if index2 < len(n[0]):[/SUB]
[SUB] index2 += 1[/SUB]
[SUB] if index2 == len(n[0]):[/SUB]
[SUB] index1 += 1[/SUB]
[SUB] index2 = 0[/SUB]
[SUB] if index1 == len(n):[/SUB]
[SUB] break[/SUB]

In the attached file there are comments which might make things more obvious. Now this is probably not very well done but it works fine with just one exception that i can’t figure out why. In the console it keeps telling me
“convertViewVec: called in an invalid context” which i figured out is caused by the translate method in the for loop.

Is this a problem? Or maybe someone has a quick idea how this can be avoided? I think maybe accessing the list for a vector Coordinate might be inappropriate but I don’t know how to do it differently.

Thanks in advance if someone has a look at it.


search the forum, it’s discussed somewhere. It’s basically a warning which can be ignored.

See also:

Thank you. Good to know it can be ignored. Also nice way of adding objects to the scene. Haven’t thought about the copy() method. Looks more intuitively than my index1, index2 thing.

Good starting point to add a conditional statement for n rows …