python doesn't work

[sohei.hori]

I'm not good at English.
It can be difficult to read. excuse me.

I'm learning Python using MAYA.
what i want to do
I want to change the thickness of NurbsCurve all at once.

Please have a look at the code and tell me what is wrong.

Thank you for watching.

from maya import cmds

nodes = cmds.ls(selection=True)
for node in nodes:
      
 if cmds.window(ram, exists =True):
    cmds.deleteUI(ram)
    
    
    
ram = cmds.window( w=300, h=300 )
cmds.columnLayout( adj=True )

cmds.getAttr(node + ".lineWidth")

cubW = cmds.floatField(pre=1, editable = True, value = 1,)

cmds.button(l= "Apply", c="LW()" )

cmds.showWindow(ram)

def LW():
    myCubeWidth = cmds.floatField(cubW , q = True, value = True)
    finalThickness = cmds.setAttr(node + ".lineWidth", n= "LW")

[Kahylan]

Hi!

There were quite a few problems,

1) You were setting a new window for each curve, changing all their values at once would not have been possible.

2) you were referencing the attribute node, in a function that did not know about it

3) you didn't provide a value in the setAttr command

And probably some more.

Here is how I would suggest your code should look like.

from maya import cmds

 
if cmds.window("ram", exists =True):
    cmds.deleteUI(ram)
    
ram = cmds.window("ram", w=300, h=300 )
cmds.columnLayout( adj=True )

cmds.getAttr(cmds.ls(sl= True)[0] + ".lineWidth")

cubW = cmds.floatField(pre=1, editable = True, value = 1,)

cmds.button(l= "Apply", c="LW()" )

cmds.showWindow(ram)

def LW():
    lineWidth = cmds.floatField(cubW , q = True, value = True)
    
    nodes = cmds.ls(selection=True)
    for node in nodes:
        cmds.setAttr(node + ".lineWidth", lineWidth)

I hope it helps!