I needed to find all the files that contained a specific string pattern. The first solution that comes to mind is using find piped with xargs grep:
Using ex/vi editor and globstar option (syntax similar to awk and sed):
ex +"/string1/,/string3/p" -R -scq! file.txt
where aaa is your starting point, and bbb is your ending text.
To search recursively, try:
ex +"/aaa/,/bbb/p" -scq! **/*.py
Note: To enable ** syntax, run shopt -s globstar (Bash 4 or zsh).