#721 pypiwin32: does not check existence of pywin32_system32 in path before setting

[Dennis Harper]

on pypi, the packages have a line in the pywin32.pth file:
import os;os.environ["PATH"]+=(';'+os.path.join(sitedir,"pywin32_system32"))

however, when you have an application that reloads the modules without exiting the python process, this will cause the path to ultimately over-run the os.environ['PATH'] buffer.

The fix would be to change that line with:
import os;os.environ["PATH"]+=(';'+os.path.join(sitedir,"pywin32_system32")) if "pywin32_system32" not in os.environ["PATH"] else ''

ultimately when the buffer over-runs, all types of bad things happen to the running application.