python zipfile.ZipFile makes zip file but can't add folders to them

[CashMunny]

yes. it is correct. i'm now getting a new error, however:

Error:
Traceback (most recent call last):
  File "C:\Python27\ArcGIS10.2\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", line 323, in RunScript
    debugger.run(codeObject, __main__.__dict__, start_stepping=0)
  File "C:\Python27\ArcGIS10.2\Lib\site-packages\pythonwin\pywin\debugger\__init__.py", line 60, in run
    _GetCurrentDebugger().run(cmd, globals,locals, start_stepping)
  File "C:\Python27\ArcGIS10.2\Lib\site-packages\pythonwin\pywin\debugger\debugger.py", line 654, in run
    exec cmd in globals, locals
  File "N:\Common\Script\Drivers\make_zips.py", line 1, in <module>
    import zipfile as zp
  File "C:\Python27\ArcGIS10.2\lib\zipfile.py", line 752, in __init__
    self.fp = open(file, modeDict[mode])
IOError: [Errno 22] invalid mode ('rb') or filename: ' P:\\2018\\Archive\\CO_001_Model.zip'