parameters: (ref)
return_statement: return os.path.isfile(ref)
docstring: Returns true if the provided reference is a file and exists.
docstring_summary: Returns true if the provided reference is a file and exists.
docstring_tokens: Returns true if the provided reference is a file and exists .
function: def IsValidFile(ref):
    """Returns true if the provided reference is a file and exists."""
    return os.path.isfile(ref)
function_tokens: def IsValidFile ( ref ) : return os . path . isfile ( ref )