通过python -u标志取消缓冲标准输出

Pass python the -u flag for unbuffering stdout

nohup python -u test.py &

Python将以其他方式缓冲stdout.这不需要更改代码.

Python will buffer stdout otherwise. This doesn't require a code change.

在手册页中:

       -u     Force  stdin,  stdout and stderr to be totally unbuffered.  On systems where it matters, also put stdin, stdout
          and stderr in binary mode.  Note that there is internal buffering in xreadlines(), readlines() and  file-object
          iterators ("for line in sys.stdin") which is not influenced by this option.  To work around this, you will want
          to use "sys.stdin.readline()" inside a "while 1:" loop.