プログレスバーとかでよくあるパーセンテージの手計算

percent= 100*i/arr_len 

# -*- coding: utf-8 -*-
import os
from functools import partial
import time
import imp


import maya.cmds as cmds
from maya import OpenMaya
import maya.api.OpenMaya as om
from collections import OrderedDict
import math
from pymel.core import *
import pymel.core as pm
import maya.mel as mel

    
try:
    imp.find_module('PySide2')
    from PySide2.QtWidgets import *
    from PySide2.QtGui import *
    from PySide2.QtCore import *

except ImportError:
    from PySide.QtGui import *
    from PySide.QtCore import *


def get_maya_pointer():

    try:
        import maya.cmds as cmds
        from maya import OpenMayaUI

    except ImportError:
        return None


    try:
        imp.find_module("shiboken2")
        import shiboken2
        return shiboken2.wrapInstance(long(OpenMayaUI.MQtUtil.mainWindow()), QWidget)

    except ImportError:
        import shiboken
        return shiboken.wrapInstance(long(OpenMayaUI.MQtUtil.mainWindow()), QWidget)

class Sample_UI(QMainWindow):

    def __init__(self, parent = None):
        super(Sample_UI, self).__init__(parent)

        self.setObjectName("Sample_Window")
        self.setWindowTitle("Sample Window")
        #self._initUI()
        self.errorDialog = QErrorMessage(self) 
           
    def _initUI(self):
        wrapper = QWidget()
        self.setCentralWidget(wrapper)

        mainLayout = QVBoxLayout()
        self.havyFunc()
    
    def _showProgressDialog(self):
        print("---------------------ProgressBar Starting--------------------------")

        self.max = 100
        self.progressDialog = QProgressDialog("Progress...", "Cancel", 0, self.max, self)
        self.progressDialog.setWindowTitle("Progress Dialog")
    
    def setProgress(self,count):
        print("---------------------setProgress ( "+str(count)+"/100 )--------------------------")
        qApp.processEvents()
        if self.progressDialog.wasCanceled():
            self.progressDialog.setValue(100)
        self.progressDialog.setValue(count)
        self.progressDialog.setLabelText("Progress... %d %%" % count)

    def havyfunc(self):
        
        #--------------------------------------------------
        self._showProgressDialog()
        self.setProgress(1)
        #--------------------------------------------------
        duplicatedMesh_vtx_arr=[1,2,3,4,5]
        arr_len=len(duplicatedMesh_vtx_arr)
        for i in range(0,duplicatedMesh_vtx_arr_len):
            #---------------------------------------------------
            parcent=(100*i/duplicatedMesh_vtx_arr_len) /2
            self.setProgress(parcent)
            print("setProgress("+str(parcent)+")")
            #---------------------------------------------------
            #重たい処理１
        
        for i in range(0,duplicatedMesh_vtx_arr_len):
            
            #---------------------------------------------------
            parcent=(100*i/duplicatedMesh_vtx_arr_len) /2 +50
            
            self.setProgress(parcent)
            
            print("setProgress("+str(parcent)+")")
            
            #---------------------------------------------------
            #重たい処理２
              
        #--------------------------------------
        self.setProgress(100)
        print("setProgress("+str(100)+")")
        #--------------------------------------
           
def start():
    maya_win = get_maya_pointer()
    ui = Sample_UI(parent = maya_win)
    #ui= MyDialog()
    ui.show()
    return ui

def starter():
    app = QApplication.instance()
    if app is None:
        app = QApplication([])
    ui = start()
    app.exec_()

print("__name__= "+__name__)
#if __name__ == '__main__':
if __name__ == 'NppMaya' or __name__ == '__main__':
    starter()