#Please not that the Python script needs to reside in tc/scripts directory
#in this example

mkdir a 
echo "b" > a/aa 

p4 configure set dm.integ.engine=3

p4 add -t text a/aa
p4 submit -d "add two files"

p4 integ a/... b/...
p4 submit -d "a to b" 

python tc/scripts/edit_files.py 3 a/aa
python tc/scripts/edit_files.py 3 b/aa

p4 integ b/... a/...
p4 integ a/... b/...
p4 resolve -at
p4 submit -d t 

p4 sync b/aa#2,2 a/aa#3,3
p4 delete a/aa
p4 submit -d t 

p4 filelog //depot/a/aa //depot/b/aa
p4 integ -o b/... a/...
p4 resolve -at
p4 submit -d t 
p4 filelog //depot/a/aa //depot/b/aa