Invalid Syntax problem (?!?)

[harley_quinn]

Hello, I am just starting to learn Python with the Python 3.5.2 version. I am supposed to start with a really easy task, renaming all the files in a folder. (Taking out the numbers out of the filenames.)

But I always get a Syntax-Error message (Invalid Syntax). Can someone please help me? I don't know what is wrong!

line 13: os apparently is a syntax error

import os

def rename_files():
    #(1) get file names form a folder
    file_list = os.listdir(r"C:\Users\harley\Documents\Python\Introduction\rename")
    #print(file_list)
    saved_path = os.getcwd()
    print("Current Wokring Directory is", saved_path)
    os.chdir(r"C:\Users\harley\Documents\Python\Introduction\rename")
    #(2) for each file, rename filename
    for file_name in file_list:
        os.rename(file_name, filename.translate("0123456789")
    os.chdir(saved_path)

rename_files()