out = open( 'data.test', 'w') # out = open( 'data.test', 'a') append L = [ 'def', 'ghi'] out.write( "abc\n") out.writelines( L) out.close() inp = open( 'data.test', 'r') print( "<") print( inp.read()) # -> abc # defghi print( ">") inp.close() inp = open( 'data.test', 'r') print( inp.readline()) # -> abc inp.close() inp = open( 'data.test', 'r') print( inp.readlines()) # -> ['abc\n', 'defghi'] inp.close()