小白，‘url’没有获取到？

import requests
def  getHTMLText(url):
	try:
		r.requests.get(url,timeout=30)
		r.raise_for_status()
		r.encoding = r.apparent_encoding
		return r.text
	except:
		return "报异常"
		if __name__=="main":
			url = "http://baidu.com"
print(getHTMLText(url)