write to file python 3

1with open(filename, 'a') as out:
2    out.write(var + '\n')
3

1with open(filename, 'a') as f:
2    print(var, file=f)
3

1>>> with open('workfile') as f:
2...     read_data = f.read()
3
4>>> # We can check that the file has been automatically closed.
5>>> f.closed
6True
7