本文介绍了将Python函数的输出从STDOUT重定向到Python中的变量的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
这就是我要实现的目标
def fun():
runner = InteractiveConsole()
while(True):
code = raw_input()
code.rstrip('\n')
# I want to achieve the following
# By default the output and error of the 'code' is sent to STDOUT and STDERR
# I want to obtain the output in two variables out and err
out,err = runner.push(code)
到目前为止,我所研究的所有解决方案都使用任一管道发出单独的脚本执行命令(在我的情况下这是不可能的).还有其他方法可以实现这一目标吗?
All the solution that I have looked at till now, use either pipes to issue separate script execution command (which is not possible in my case). Any other way I can achieve this?
推荐答案
import StringIO, sys
from contextlib import contextmanager
@contextmanager
def redirected(out=sys.stdout, err=sys.stderr):
saved = sys.stdout, sys.stderr
sys.stdout, sys.stderr = out, err
try:
yield
finally:
sys.stdout, sys.stderr = saved
def fun():
runner = InteractiveConsole()
while True:
out = StringIO.StringIO()
err = StringIO.StringIO()
with redirected(out=out, err=err):
out.flush()
err.flush()
code = raw_input()
code.rstrip('\n')
# I want to achieve the following
# By default the output and error of the 'code' is sent to STDOUT and STDERR
# I want to obtain the output in two variables out and err
runner.push(code)
output = out.getvalue()
print output
在较新版本的python中,此contezt管理器内置于:
In newer versions of python, this contezt manager is built in:
with contextlib.redirect_stdout(out), contextlib.redirect_stderr(err):
...
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