Blames TODOs in Python files

prod.sh

GIT_GREP="$(git grep -i -n -E '#[ ]*TODO' -- '*.py')"

IFS=$'\n' read -rd '' -a LINES <<<"$GIT_GREP"
for LINE in "${LINES[@]}"
do
  IFS=: read FILE LINE MATCH <<<"$LINE"
  echo "$FILE:$LINE"
  git blame $FILE -L $LINE,+1
  echo
done

If you want to run it in subdirectories, add the --full-name option to the GIT_GREP command.