get url and return content and save to file

def save_to_file(url, file_name='', overwrite=False):
    """
    Get content from url and save to file.
    Default filename is url's name.
    Default will use overwrite=True.
    """
    try:
        r = requests.get(url)
        if r.status_code == requests.codes.ok:
            file_name = file_name or url.split('/')[-1]
            if not overwrite and os.path.exists(file_name):
                print('File {} already exists.'.format(file_name))
            else:
                with open(file_name, 'wb') as fd:
                    for chunk in r.iter_content(chunk_size=1024):
                        fd.write(chunk)
        else:
            r.raise_for_status()
    except requests.RequestException as e:
        print(e)