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Calling function from UI class in maya resulting in nonetype error

I'm building a toolbox UI using python in Maya, and I keep on getting a Nonetype error when I call one of the imported functions. This is the script for the toolbox:
class Toolbox():
import maya.cmds as cmds
def __init__(self):
self.window_name = "mlToolbox"
def create(self):
self.delete()
self.window_name = cmds.window(self.window_name)
self.m_column = cmds.columnLayout(p = self.window_name, adj = True)
cmds.button(p=self.m_column,label = 'MyButton', c=lambda *arg: cmds.polySphere(r = 2))
cmds.button(p=self.m_column, label = 'Make_Control', command = lambda *args: self.ControlBTN())
cmds.button(p=self.m_column, label = 'Find Center of All Selected', command = lambda *args: self.CenterBTN())
cmds.button(p=self.m_column, label = 'Find Center of Each Selected Object', command = lambda *args: self.IndiCenterBTN())
self.colorname = cmds.textField(placeholderText = 'Enter color name...')
cmds.button(p=self.m_column, label = 'ChangeColor', command = lambda *args: self.colorBtn())
self.MinAndMax = cmds.textField()
cmds.button(p=self.m_column, label = 'Random Scatter', command = lambda *args: self.ScatterBTN())
cmds.showWindow(self.window_name)
cmds.button(p=self.m_column, label = 'Select Everything', command = lambda *args: self.selectBTN())
def CenterBTN(self):
import CenterSelected
CenterSelected.Locator()
def ScatterBTN(self):
import Scatter
value = cmds.textField(self.MinAndMax, q=True)
Scatter.RandomScatter(value)
cmds.intField(self.moveMin, self.moveMax, self.rotMin, self.rotMax, self.scaleMin, self.scaleMax, e=True, text='')
def IndiCenterBTN(self):
import ManySelected
ManySelected.LocatorMany()
def colorBtn(self):
import ColorControl
value = cmds.textField(self.colorname, q=True, text = True)
ColorControl.colorControl(value)
cmds.textField(self.colorname, e=True, text='')
def selectBTN(self):
import tools
tools.selectAll()
def delete(self):
if cmds.window(self.window_name, exists=True):
cmds.deleteUI(self.window_name)
def ControlBTN(self):
import CreateControl
CreateControl.createControl()
myTool = Toolbox()
myTool.create()
And this is the function that I'm having trouble with:
def RandomScatter(MinAndMax):
import random
import maya.cmds as cmds
Stuff = cmds.ls(sl=True)
i=0
for i in range(random.randint(1,100)):
Stuff.append(cmds.duplicate(Stuff))
cmds.move( (random.randint(MinAndMax[0], MinAndMax[1])), (random.randint(MinAndMax[0], MinAndMax[1])), (random.randint(MinAndMax[0], MinAndMax[1])), Stuff[i], absolute=True )
cmds.rotate( (random.randint(MinAndMax[2], MinAndMax[3])), (random.randint(MinAndMax[2], MinAndMax[3])), (random.randint(MinAndMax[2], MinAndMax[3])), Stuff[i], absolute=True )
cmds.scale( (random.randint(MinAndMax[4], MinAndMax[5])), (random.randint(MinAndMax[4], MinAndMax[5])), (random.randint(MinAndMax[4], MinAndMax[5])), Stuff[i], absolute=True )
i = i+1
RandomScatter() works fine as long as I call it on it's own using a RandomScatter([a, b, c, d, e, f]) format, but when I try to call it Toolbox(), I get "Scatter.py line 21: 'NoneType' object has no attribute 'getitem'" as an error. It also happens when I try to use the intField() command instead of textField(). The UI window builds just fine; the error only happens after I enter input into the text field and press the button that's supposed to call RandomScatter(). It seems like the input isn't making it to the MinAndMax list, so when it reaches "cmds.move( (random.randint(MinAndMax[0]," it can't find anything to put in the MinAndMax[0] slot, or any of the slots after that, but I can't figure out why. Does anyone have any advice?

I didn't test your code and didn't read it totally, but I can already say that your strange "lambda" usage doesn't make any sens.
lambda *args: self.ControlBTN()
this lambda execute self.ControlBTN during the cmds.button definition and provide to it a function which return None.
that like doing that:
self.ControlBTN()
function = def func(): return None
cmds.button(p=self.m_column, label = 'Make_Control', command=function)
I advise you to reread the documentation about the "python lambda".
replace this by:
cmds.button(p=self.m_column, label = 'Make_Control', command=self.ControlBTN)
...
def ControlBTN(self, *args)
...
That should help
good luck

As written self.MinAndMax is a text field; even if you get the value from it it'll be a string and you won't be able to index into it to get the individual items -- and your indexing will be thrown off if any of the numbers are negative or have decimals. The lazy solution is to use a FloatFieldGrp which lets you have 2-4 numberic inputs. It's a bit annoying to get at all of the values at once (see the way it's done below) but it will avoid many issues with trying to parse the text field.
Also, this line doesn't make sense in context:
cmds.intField(self.moveMin, self.moveMax, self.rotMin, self.rotMax, self.scaleMin, self.scaleMax, e=True, text='')
You're not seeing the error because it's failing in the previous line, but the first argument ought to be the name of an existing intField.
In any case, I'd refactor this a bit to keep the argument parsing out of the scatter function, so you can separate out the working logic from the UI parsing logic. It'll make it much easier to spot where things have gone off the rails:
import random
import maya.cmds as cmds
class TestGUI(object):
def __init__(self):
self.window = cmds.window()
self.layout = cmds.rowLayout(nc=3)
self.min_xyz = cmds.floatFieldGrp( numberOfFields=3, label='min', value1=-10, value2=-10, value3=-10 )
self.max_xyz= cmds.floatFieldGrp( numberOfFields=3, label='min', value1=10, value2=10, value3=10 )
cmds.button(label='scatter', c = self.scatter)
cmds.showWindow(self.window)
def scatter(self, *_):
selected = cmds.ls(sl=True)
if not selected:
cmds.warning("select something")
return
min_xyz = (
cmds.floatFieldGrp(self.min_xyz, q=True, v1=True),
cmds.floatFieldGrp(self.min_xyz, q=True, v2=True),
cmds.floatFieldGrp(self.min_xyz, q=True, v3=True)
)
max_xyz = (
cmds.floatFieldGrp(self.max_xyz, q=True, v1=True),
cmds.floatFieldGrp(self.max_xyz, q=True, v2=True),
cmds.floatFieldGrp(self.max_xyz, q=True, v3=True)
)
print "scatter settings:", min_xyz, max_xyz
rand_scatter(selected, min_xyz, max_xyz)
def rand_scatter(selection, min_xyz, max_xyz):
dupe_count = random.randint(1, 10)
duplicates = [cmds.duplicate(selection) for n in range(dupe_count)]
for dupe in duplicates:
destination = [random.randint(min_xyz[k], max_xyz[k]) for k in range(3)]
cmds.xform(dupe, t=destination, absolute=True)
print (dupe, destination)
t = TestGUI() # shows the window; hit 'scatter' to test
My version changes your logic a bit -- you were duplicating your selection list, which would cause the number of items to grow exponentially (as each duplication would also duplicate the previous dupes). I'm not sure if that's inline with your intention or not.
You can avoid the extra lambdas by including a *_ in the actual button callback; it's a minor maya irritant that buttons always have that useless first argument.
As an aside, I'd try not to do imports inside of function bodies. If the imported module is not available, it's better to know at the time this file is imported rather than only when the user clicks a button -- it's much easier to spot a missing module if you do all your imports in a block at the top.

How do I connect custom Attributes to node inputs?

I'm finally in the end game of the Helper Joint script I'm working on and only 1 last problem stands in my way. Here is how the script is supposed to work. Create a joint, name it "Parent_Joint" then create a "multDoubleLinear" node in the node editor, name it "bob, Hit "Load Parent Joint" after selecting the joint you created and hit add attribute. In an ideal world where I'm smarter on this subject, The custom attribute added to the joint would be plugged into bob's "input1" instead I get an error saying "# Error: The source attribute 'Parent_Joint_HelperJntAttr' cannot be found."
In terms of what I've already tried, I put connectAttr beneath addAttr as common sense would dictate that first the attribute must be created before it's connected: but despite this it's just refusing to connect. I know the fault doesn't fall on the "bob.input1" node, because it only brings up the prefixed attribute name for 'Parent_Joint_HelperJntAttr: so my guess is it's just simply my lack of knowledge in writing this particular procedure.
import maya.cmds as cmds
if cmds.window(window, exists =True):
cmds.deleteUI(window)
window = cmds.window(title='DS Attribute adder')
column = cmds.columnLayout(adj=True)
sld_textFld = cmds.textField('sld_surfaceTextHJ', width =240)
def set_textfield(_):
sel = cmds.ls(selection=True)
cmds.textField(sld_textFld, edit=True, text=sel[0])
load_button = cmds.button( label='Load Parent Joint', c = set_textfield)
def add_Attribute(_):
text_value = cmds.textField(sld_textFld, q = True, text=True)
if text_value:
print "attrAdded:"
cmds.addAttr(ln=text_value +'_HelperJntAttr', defaultValue=5.0, minValue=0, attributeType='float', keyable=True)
cmds.connectAttr( text_value +"_HelperJntAttr", 'bob.input1')
else:
cmds.warning("select an object and add it to the window first!")
node_button = cmds.button( label='add attribute', c = add_Attribute)
cmds.showWindow(window)
I know how to use the connectAttr command on default attributes in maya, but where I fall flat is custom attributes. My hope is I come out of this knowing how to write code that both creates and connects the custom attributes of the joint. Thank you in advance for your help

The way you were using addAttr, it was including the joint's name in the attribute name. Attributes are separated with a ., not an _, so your connectAttr also fails because of that.
You also need to initialize your window variable to some default value or it fails on the line where you check if it exists (but window isn't defined at that point).
Here is the script adding the attribute and connecting it as expected:
import maya.cmds as cmds
window = "" # Need to initialize this variable first or it crashes on next line.
if cmds.window(window, exists =True):
cmds.deleteUI(window)
window = cmds.window(title='DS Attribute adder')
column = cmds.columnLayout(adj=True)
sld_textFld = cmds.textField('sld_surfaceTextHJ', width =240)
def set_textfield(_):
sel = cmds.ls(selection=True)
cmds.textField(sld_textFld, edit=True, text=sel[0])
load_button = cmds.button( label='Load Parent Joint', c = set_textfield)
def add_Attribute(_):
text_value = cmds.textField(sld_textFld, q = True, text=True)
if text_value:
print "attrAdded:"
# Attribute must be created this way.
cmds.addAttr(text_value, ln='HelperJntAttr', defaultValue=5.0, minValue=0, attributeType='float', keyable=True)
# Attribute is separated with a dot.
cmds.connectAttr(text_value + ".HelperJntAttr", 'bob.input1')
else:
cmds.warning("select an object and add it to the window first!")
node_button = cmds.button( label='add attribute', c = add_Attribute)
cmds.showWindow(window)

maya python textField + object name Assistance Please

Here is my plan. First create a joint and open your node editor. When you got your joint created, name it "A_Joint" hit "load joint" after running the script, then hit "test" upon hitting test, you should get a node created with the name "A_Joint_firstGuy"
the objective of this script is to create a node based on the name of whatever you loaded into the textField. It will take the name of the selected object and add it to the front of the name of the node
Atleast thats what should happen, but in truth I lack the knowledge to figure this out and every google search has thus far been fruitless. The script is down below for anyone willing to take a crack at it, thank you for your time and I hope to hear back from you:
https://drive.google.com/file/d/1NvL0MZCDJcKAnVu6voVNYbaW0HurZ6Rh/view?usp=sharing
Or here, in SO format:
import maya.cmds as cmds
if cmds.window(window, exists =True):
cmds.deleteUI(window)
window = cmds.window(title = "DS Selection Loader Demo", widthHeight=(300, 200) )
cmds.columnLayout(adjustableColumn=True)
def sld_loadHelperJoint():
sel = cmds.ls(selection=True)
selString = " ".join(sel)
add = cmds.textField('sld_surfaceTextHJ', edit=True, text=selString)
#def sld_loadParentJoint():
# sel = cmds.ls(selection=True)
# selString = " ".join(sel)
# add = cmds.textField('sld_surfaceTextPJ', edit=True, text=selString)
def createNode():
testNode = cmds.createNode( 'transform', selString = "sld_surfaceTextHJ", name = '_firstGuy' )
cmds.columnLayout(adjustableColumn=True)
sld_textFld = cmds.textField('sld_surfaceTextHJ', width =240)
cmds.button( label='Load Helper Joint', command = "sld_loadHelperJoint()")
cmds.setParent('..')
#cmds.columnLayout(adjustableColumn=True)
#name = cmds.textField('sld_surfaceTextPJ', width =240)
#cmds.button( label="Load Parent Joint", command = "sld_loadParentJoint()")
#cmds.setParent('..')
testNode = cmds.createNode( 'transform', name = textField +'_firstGuy' )
# you must first create "def" group for the attributes you
# want to be created via button, "testNode" is our example
# Connect the translation of two nodes together
#cmds.connectAttr( 'firstGuy.t', 'secondGuy.translate' )
# Connect the rotation of one node to the override colour
# of a second node.
#cmds.connectAttr( 'firstGuy.rotate', 'secondGuy.overrideColor' )
cmds.showWindow (window)

OK, there's a few things going on here to consider.
First, Maya gui widgets look like strings -- just like you make a polyCube and it comes back to you as the string 'pCube1', a widget will come back as a string like 'myWindow' or 'textField72'. Just like working with scene objects, you always need to capture the results of a command so you know what it's really called -- you can't guarantee you'll get the name you asked for, so always capture the results.
So you want to do something like this, just to get the graphics going:
window = cmds.window(title='selection loader demo')
column = cmds.columnLayout(adj=True)
sld_textFld = cmds.textField('sld_surfaceTextHJ', width =240)
load_button = cmds.button( label='Load Helper Joint')
cmds.show_window(window)
If you needed to ask what's in the textField, for example, you'd do:
text_contents = cmds.textField(sld_textFld, q=True, text=True)
You notice that's with the variable, not the string, so we're sure we have whatever worked.
To make the button use that information, though, the button script needs to have access to the variable. There are several ways to do this -- it's a common stack overflow question -- but the easiest one is just to define the button command where you already have that variable. So the above sample becomes:
window = cmds.window(title='selection loader demo')
column = cmds.columnLayout(adj=True)
sld_textFld = cmds.textField('sld_surfaceTextHJ', width =240)
def set_textfield(_):
sel = cmds.ls(selection=True)
add = cmds.textField(sld_textFld, edit=True, text=sel[0])
load_button = cmds.button( label='Load Helper Joint', c = set_textfield)
cmds.showWindow(window)
There are two bits here.
One is the _ in the function definition; Maya buttons always call their functions with one argument. There's nothing magical about the underscore, it's just Python slang for "ignore me" -- but if you don't have an argument in the function def, it will fail.
The more important bit is that the button is given the function definition directly, without quotes. You are saying call this function when clicked. If you use the string version -- a holdover from MEL -- you will run into problems later. The reasons are explained in detail here but the TLDR is don't use the the string form. Ever.
Now that the structural pieces are in place, you should be able to either the node creation to the function I called set_textfield() or make a second button\function combo that does the actual node creation, something like:
window = cmds.window(title='selection loader demo')
column = cmds.columnLayout(adj=True)
sld_textFld = cmds.textField('sld_surfaceTextHJ', width =240)
def set_textfield(_):
sel = cmds.ls(selection=True)
cmds.textField(sld_textFld, edit=True, text=sel[0])
load_button = cmds.button( label='Load Helper Joint', c = set_textfield)
def make_node(_):
text_value = cmds.textField(sld_textFld, q = True, text=True)
if text_value:
print "created:", cmds.createNode('transform', n=text_value +'_firstGuy')
else:
cmds.warning("select an object and add it to the window first!")
node_button = cmds.button( label='Make Node', c = make_node)
cmds.showWindow(window)

use text from textField for naming - maya python

I want to use the output of a textField to serve as a name for a newly created blenshape. However when I press the button to create my shape it only consideres the text that has been defined by me as a stock text that should be replaced. It doesn't consider new letters typed in the box :
def buildUI(self, *args):
self.widgets["bs"] = cmds.textField (tx= "Replace me", editable= True, )
self.widgets["blendshape_name"] = cmds.textField(self.widgets['bs'], q=True, text=True)
cmds.button(label="Create BlendShape ", w=295, h=30, al="center", c=self.blendShape)
def blendShape (self, *args):
cmds.blendShape ( cmds.ls(sl=True)[1], cmds.ls(sl=True)[0],frontOfChain=True, n= self.widgets["blendshape_name"] )

You query the blendshape_name only when you run buildUI function. You have to read the textfield at every click. So query the blendshape_name inside the function blendShape:
def blendShape(self, *args):
blendshape_name = cmds.textField(self.widgets['bs'], q=True, text=True)
cmds.blendShape(cmds.ls(sl=True)[1], cmds.ls(sl=True)[0], frontOfChain=True, n=blendshape_name)

Selecting/Invoking Menubuttons in python Tkinter

I am trying to create a menu that calls an SQL database for life expectancy data across the world. I'm having trouble with menubutton, as I want to set the first value ("No region selected") as my initial value. There are three things that I want: how to set the value as the default (ideally the equivalent of invoked for normal radiobuttons), is there a better for what I want option than menubutton, and is there a decent web page that can help me (tutorialspoint got me in the initial direction, but unless I'm looking in the wrong places, I can't find how to select and invoke radiobuttons in the menubutton).
Ideally, I'd also like advise on how not to have the menuoptions stretch up everywhere too. A limit of say 20?
Here's a look of a somewhat stripped down piece of my code.
Edit: I've found a solution to my select/invoke issues. mb.menu.invoke(0)
from Tkinter import *
import tkMessageBox
import Tkinter
import sqlite3
def selectStuff():
selectionRegion = str(countryVar.get())
mb.config(text = selectionRegion)
sqlLocation = 'AllData/LifeExpectency.sqlite'
sqlDB = sqlite3.connect(sqlLocation)
cursor = sqlDB.cursor()
root = Tk()
frameCountry = Frame(root)
frameCountry.pack()
stringCountry= StringVar()
labelCountry = Label(frameCountry, textvariable=stringCountry)
stringCountry.set("Select Region")
labelCountry.pack()
'''-------------------------------'''
mb = Menubutton ( frameCountry, relief=RAISED, activebackground="white")
mb.grid()
mb.menu = Menu ( mb, tearoff = 0 )
mb["menu"] = mb.menu
sql1 = "SELECT Country FROM total_lifespan"
countryVar = StringVar()
mb.menu.add_radiobutton ( label="No Region Selected", variable =countryVar,
value = "No Region Selected", command =selectStuff)
try:
cursor.execute(sql1)
results = cursor.fetchall()
for row in results:
mb.menu.add_radiobutton ( label=row, variable =countryVar, value = row,
command =selectStuff)
except:
print "Error: unable to retrieve data."
mb.pack()
'''-------------------------------'''
#Edit:
mb.menu.invoke(0)
#/Edit:
root.mainloop()
sqlDB.close()