python写了一个简易MIPS汇编器，代码出错，求高手解答,该怎么解决

import wx
import string
def process(event):
    destination.Clear()
    lineNo=source.GetNumberOfLines()
    for i in range(0, lineNo, 1):
        destination.AppendText(macCode(source.GetLineText(i))+'\n')

def clr(event):
    source.Clear()
    destination.Clear()
    
def macCode(mipsStr):
    mipsStr=string.replace(mipsStr, ",", "")
    mipsStr=string.replace(mipsStr, "(", " ")
    mipsStr=string.replace(mipsStr, "$", "")
    codeList=string.split(mipsStr, ' ')
    if codeList[0]=="add" or "sub" or "and" or "or" or "slt":
        macStr=getOp(codeList[0])+getRegAsm(codeList[2])+getRegAsm(codeList[3])+getRegAsm(codeList[1])+getShamt(codeList[0])+getFunc(codeList[0])
    elif codeList[0]=="lw" or "sw":
        macStr=getOp(codeList[0])+getRegAsm(codeList[3])+getRegAsm(codeList[1])+getImAsm(codeList[2])
    elif codeList[0]=="beq":
        macStr=getOp(codeList[0])+getRegAsm(codeList[2])+getRegAsm(codeList[1])+getImAsm(codeList[3])
    elif codeList[0]=="j":
        macStr=getOp(codeList[0])+getJaddressAsm(codeList[1])
    elif codeList[0]=="nop":
        macStr="00000000000000000000000000000000"
    else: macStr="Invalid line..."
    return macStr

def getOp(instType):
    if instType=="add" or "sub" or "and" or "or" or "slt":
        return "000000"
    elif instType=="lw":
        return "100011"
    elif instType=="sw":
        return "101011"
    elif instType=="beq":
        return "000100"
    elif instType=="j":
        return "000010"
    else: return "000000"

def toBinary(num, length):
    result=''
    tmp=int(num, 10)
    for i in range(0, length, 1):
        if tmp%2:
            result='1'+result
            tmp-=1
        else: result='0'+result
        tmp/=2
    return result

def getRegAsm(num):
    return toBinary(num, 5)

def getImAsm(num):
    return toBinary(num, 16)

def getJAddressAsm(num):
    return toBinary(num, 26)

def getShamt(instType):
    if instType=="add" or "sub" or "and" or "or" or "slt":
        return "000000"
    else: return "000000"

def getFunc(instType):
    if instType=="add":
        return "100000"
    elif instType=="sub":
        return "100010"
    elif instType=="and":
        return "100100"
    elif instType=="or":
        return "100101"
    elif instType=="slt":
        return "101010"
    else: return "000000"

    
#UI part...
app=wx.App()
win=wx.Frame(parent=None, title="MIPS 汇编器", size=(420, 500))
bkg=wx.Panel(win)
source=wx.TextCtrl(parent=bkg, pos=(8,10), size=(390, 200), style=wx.TE_MULTILINE|wx.HSCROLL)
destination=wx.TextCtrl(parent=bkg, pos=(8, 250), size=(390, 200), style=wx.TE_MULTILINE|wx.HSCROLL)
clrButton=wx.Button(parent=bkg, pos=(315,215), size=(80, 30), label="清空")
proButton=wx.Button(parent=bkg, pos=(230,215), size=(80, 30), label="汇编")
source.SetValue("nop\nadd $1, $2, $3\nsub $1, $2, $3\nand $2, $3, $4\nor $1, $5, $3\nslt $1, $2, $5\nlw $1, 10($2)\nsw $1, 10($1)\nbeq $1, $2, 10\nj 10000")
proButton.Bind(wx.EVT_BUTTON, process)
clrButton.Bind(wx.EVT_BUTTON, clr)
win.Show()
app.MainLoop()
#End of UI part

def macCode(mipsStr):
    mipsStr = string.replace(mipsStr, ",", "")
    mipsStr = string.replace(mipsStr, "(", " ")
    mipsStr = string.replace(mipsStr, ")", "")
    mipsStr = string.replace(mipsStr, "$", "")
    codeList = string.split(mipsStr, ' ')
    if codeList[0] in ["add", "sub", "and", "or", "slt"]:
        macStr = getOp(codeList[0]) + getRegAsm(codeList[2]) + getRegAsm(codeList[3]) + getRegAsm(codeList[1]) + getShamt(codeList[0]) + getFunc(codeList[0])
    elif codeList[0] in ["lw", "sw"]:
        macStr = getOp(codeList[0]) + getRegAsm(codeList[3]) + getRegAsm(codeList[1]) + getImAsm(codeList[2])
    elif codeList[0] == "beq":
        macStr = getOp(codeList[0]) + getRegAsm(codeList[2]) + getRegAsm(codeList[1]) + getImAsm(codeList[3])
    elif codeList[0] == "j":
        macStr = getOp(codeList[0]) + getJAddressAsm(codeList[1])
    elif codeList[0] == "nop":
        macStr = "00000000000000000000000000000000"
    else: macStr = "Invalid line..."
    return macStr