Moodle in English

What is the problem in following code.

Moodle Produce following Error

"cat: file2: No such file or directory"

vpl_Evalute.sh

#! /bin/bash
   
cat > vpl_execution <<EOF
#! /bin/bash

cat fun.py > user_source


cat user_source | grep "def" user_source > cut_fun_line


cat cut_fun_line | head -n 1 cut_fun_line > new_file


cat new_file | cut -d " " -f1 > file2

head=$(cat file2)

br="def"


if [ "$head" = "$br" ]
then
   echo "function Available"
   else
   echo "Without function"
fi



EOF

chmod +x vpl_execution

Fun.py

def add():
    print "hello"




add()