目录遍历

import os
def dir_travel(dir_name):
    for x in os.listdir(dir_name):
        if os.path.isdir(os.path.join(dir_name,x)):
            dir_travel(os.path.join(dir_name,x))
        else:
            if os.path.splitext(x)[1]==".py":
                print(os.path.join(dir_name,x))



if __name__ == "__main__":
    dir_travel(".")