Python 调用 wget 命令下载报错如下

save_path = os.path.join("/home/shenjianlin/pdf_file",name)
try:
cmd = ("sudo wget -P -N -o -c -O {} {}".format(save_path, link))
ref = subprocess.call(cmd, shell=True)
if ref != 0:
print ("can't get download")
else:
print("finishing downloading {} page {} row data".format(i,j))
except Exception as e :
print('download error has happend')
print (e)

报错如下：
/bin/sh: $'\350\266\213\345\212\277\345\261\225\346\234\233-82\351\241\265': command not found
can't get download
《 2018 暑期旅游消费趋势预测》：亲子客群占主流  高档海岛酒店占比提升-6 页.pdf
途牛旅游网
2018-06-22 18:01:38
http://pdf1.qimingpian.com/announcement_real/5b2c9ac2320c7.pdf


wget: missing URL
Usage: wget [OPTION]... [URL]...

Try `wget --help' for more options.
can't get download