IDA Python script to NOP (x86/x64) selected bytes

ida-null-bytes.py

import idaapi as ia, idc

def PLUGIN_ENTRY(): return nop()
class nop(ia.plugin_t):
 flags = ia.PLUGIN_UNL
 comment = "NOP"
 help = "select bytes, run"
 wanted_name = "NOP bytes..."
 wanted_hotkey = "Ctrl+Shift+N"

 def init(self): return ia.PLUGIN_OK
 def term(self): pass
 def run(self, arg):
  no = 0x90
  ib = idc.BADADDR
  pb = idc.patch_byte
  s1 = idc.read_selection_start()
  e1 = idc.read_selection_end()

  if s1 == ib or e1 == ib: pb(idc.here(), no)
  else:
   for x in range((e1-s1)):
       pb(s1+x, no)
       idc.create_insn(s1+x)