Simple partial Callback in Pyside

from PySide import QtGui
import maya.OpenMayaUI as mui
import shiboken
import pymel.core as pm
import maya.cmds as cmds

from functools import partial

def get_maya_window():
    pointer = mui.MQtUtil.mainWindow()
    return shiboken.wrapInstance(long(pointer), QtGui.QWidget)

###---Functions---###a

def move_keys(spinBox):
    spinBoxVal = spinBox.value()

curSel = pm.selected()

pm.keyframe(curSel, relative=True, tc=(spinBoxVal))

####---Window code---###

windowName = "myWin"

#check for window
if cmds.window("myWin", exists = True):
    cmds.deleteUI("myWin", wnd=True)

#window
parent = get_maya_window()
window = QtGui.QMainWindow(parent)
window.setObjectName(windowName)
window.setWindowTitle("Anim Tools")

#font
font = QtGui.QFont()
font.setPointSize(12)
font.setBold(True)

#main widget
mainWidget = QtGui.QWidget()
window.setCentralWidget(mainWidget)

#Translate layout
translateLayout = QtGui.QHBoxLayout()

#Vertical layout
verticalLayout = QtGui.QVBoxLayout(mainWidget)
parent = get_maya_window()
verticalLayout.addLayout(translateLayout)

#Label
label = QtGui.QLabel("Shift Value:")
translateLayout.addWidget(label)

#SpinBox
spinBox = QtGui.QSpinBox()
spinBox.setRange(0,10000)
spinBox.setValue(50)
translateLayout.addWidget(spinBox)

#button
button = QtGui.QPushButton("Shift")
verticalLayout.addWidget(button)
button.setMinimumSize(100,40)
button.setFont(font)
button.setMaximumSize(400,40)
button.setStyleSheet("background-color:rgb(59,248,130); color: black")
button.clicked.connect(partial(move_keys, spinBox))#                                        <---------This is where I don't know what to do!

#show window
window.show()

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