<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def verify(path):
 """Verify that `path` is a valid TIFF file"""

        valid = False
        try:
            tf = SingleTifHolo._get_tif(path)
        except (ValueError, IsADirectoryError):
            pass
        else:
            if len(tf) == 1:
                valid = True
        return valid