Python读/写文件而不关闭

Question

有时当我打开文件以用Python读写时

f = open('workfile', 'r')

要么

f = open('workfile', 'w')

我读/写文件，但最后我忘了做f.close()。在完成所有读/写操作或代码完成处理后，是否可以自动关闭？

Answer 1

with open('file.txt','r') as f:
    #file is opened and accessible via f 
    pass
#file will be closed before here