Self Replication

[Tech B]

I've been reading a lot here lately on self replicating code. I wanted to try my hand at it.

It only copies itself in forward directories. I.E. "C:\Users\cd.." is not supported yet but will be later.

I wanted to post it here to see if anyone had ideas, tips, and help with code layout. I know my code has to be sloppy and could be improved.

import os, random, sys

cur = os.listdir(os.getcwd())


def ishere(dir):
  for i in dir:
    if i == "PySpawn.exe":
      return False
    else:
      return True

def dirList(dir):
  lis = []
  for i in dir:
    try:
      if i.index("."):
        continue
    except ValueError: lis.append(i)
  return lis
    
li = dirList(cur)

if ishere(cur) == True:
  f = open("PySpawn.exe","rb")
  f = f.read()
  l = open("library.zip","rb")
  l = l.read()
  os.chdir(os.getcwd()+"\\"+li[random.randint(1,len(li)-1)])
  x = open("PySpawn.exe","wb")
  x.write(f)
  lx = open("library.zip","wb")
  lx.write(l)