How to use projectile-replace only for specific wildcard such as Python?

Question

From this answer, I am using projectile-replace to replace words within a folder. It works fine but it covers all the buffers.

I was able to accomplish it it using find-dired:

(defun my-find-files ()
  (interactive)
  (find-dired "~/project" "-name \\*.py))

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=> How can I apply projectile-replace only for Python files?