How to change a file's permissions/attributes to make it not readable in Windows with Python

Question

I am trying to test some code, and to test it I need to get an exception in a specific location:

def makeThisFunctionReturnTrue(filename):
    if os.path.exists(input) and os.path.isfile(filename):
        try: 
            open(filename, "r")
        except IOError, err:
            return True
    return False

I need to figure out what input filename would cause the above function to return True. I think that the solution lies with either changing permissions or attributes in the file. I am able to force the error manually by going into the properties of a file through windows explorer and then going to security and then denying permissions. However, I need to be able to create the file dynamically in Python and then change the permissions through Python to force the error.

My first thought was to use os.chmod(); however, this function appears to be limited in a Windows environment.

A co-worker of mine suggested that I use win32file.SetFileAttributes(), but I cannot find any good documentation on this function.

Thanks for the help.

Caleb Rouleau

Answer 1

自己提出异常

raise IOError('SUITABLE INFO HERE')