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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_image_file_path(instance, filename):
 """Returns a unique filename for images."""

    ext = filename.split('.')[-1]
    filename = '%s.%s' % (uuid.uuid4(), ext)
    return os.path.join(
        'user_media', str(instance.user.pk), 'images', filename)