How to handle control-C when piping output to tee from Python.

controlc_pipeline.py

# Run with
## python -u controlc_pipeline.py | tee foo.out
# Then press control-C.
## You never see the output without an IOError handler,
## because an IOError is generated (stdout went away) before a KeyboardInterrupt.
## You could catch the IOError and redirect stdout manually. UPDATE: That doesn't seem to work.
## Or you could tell `tee` to ignore SIGINT and exit this program gracefully:
# python -u controlc_pipeline.py | tee -i foo.out

from __future__ import print_function, division

from time import sleep

while True:
    try:
        print( "Awake" )
        sleep(1)
    ## Without this, you'll never catch KeyboardInterrupt
    ## in a pipeline that's control-C'd.
    ## UPDATE: This doesn't seem to work either.
    except IOError:
        import sys
        sys.stdout = open( "controlc_pipeline.out", 'a' )
    except KeyboardInterrupt:
        print( "Control-C" )
        break

print( "Goodbye" )