pyfiles_ex.py

import os

def pyfiles():
    base_dir = "/home/username/blender-2.76b-linux-glibc211-x86_64/2.76/scripts"
    for dir_name, child_dirs, files in os.walk(base_dir):
        for file_name in files:
            if file_name.endswith(".py"):
                full_path = "{}{}{}".format(dir_name, os.path.sep, file_name)
                yield full_path

for file_path in pyfiles():
    print(file_path)