redirecting stdout to a file as well as screen

[SamG]

On Apr 12, 12:40 pm, "Ant" <ant... at gmail.com> wrote:
> On Apr 12, 8:14 am, "SamG" <mad.vi... at gmail.com> wrote:
>
> > How could i make, from inside the program, to have the stdout and
> > stderr to be printed both to a file as well the terminal(as usual).
>
> One way would be to create a custom class which has the same methods
> as the file type, and held a list of file-like objects to write to.
> e.g.
>
> class multicaster(object):
>     def __init__(self, filelist):
>         self.filelist = filelist
>
>     def write(self, str):
>         for f in self.filelist:
>             f.write(str)
>     def writelines(self, str_list):
>         #etc
>
> Then assign stdout and stderr to a new instance of one of these
> objects:
>
> mc = multicaster([sys.stdout, sys.stderr, log_file])
> sys.stdout = mc
> sys.stderr = mc
>
> HTH



I have written this....

import sys

class multicaster(object):
    def __init__(self, filelist):
        self.filelist = filelist

    def write(self, str):
        for f in self.filelist:
            f.write(str)

log_file='out.log'
mc = multicaster([sys.stdout, sys.stderr, log_file])
sys.stdout = mc
sys.stderr = mc

print "Hello"

And i get this when i run the porgram.

HelloHelloTraceback (most recent call last):
Traceback (most recent call last):

Kindly advice!