import sys try: import _os as os except ImportError: import os if not hasattr(os, "unlink"): print("SKIP") sys.exit() try: os.unlink("testfile") except OSError: pass # Should create a file f = open("testfile", "a") f.write("foo") f.close() f = open("testfile") print(f.read()) f.close() f = open("testfile", "a") f.write("bar") f.close() f = open("testfile") print(f.read()) f.close()