code: def getenv(key, value=None):
      
  
      key = path2fsn(key)
      if is_win and PY2:
          return environ.get(key, value)
      return os.getenv(key, value)
docs: Like `os.getenv` but returns unicode under Windows + Python 2
  
      Args:
          key (pathlike): The env var to get
          value (object): The value to return if the env var does not exist
      Returns:
          `fsnative` or `object`:
              The env var or the passed value if it doesn't exist