Shell Programming and Scripting

i'm calling a python script from shell script. the python needs Y as an input everytime. how can i giv it thru shell script.
I tried below code

for arg in `cat erd_gen_list.lst`
do
generateErdSql.py -S $arg << Y
done

This is giving me err : `<<' unmatched

pls help.

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---------- Post updated at 10:18 AM ---------- Previous update was at 10:17 AM ----------

you should have a programed named "yes" on your computer.

Code:

yes | python script