如何解决python/美汤中的MissingSchema错误？

import requests

url = "example.com"  # 缺少协议部分

try:
    response = requests.get(url)
    # 处理响应数据
except requests.exceptions.MissingSchema:
    # 添加协议部分
    fixed_url = "http://" + url
    response = requests.get(fixed_url)
    # 处理响应数据

from bs4 import BeautifulSoup
import requests

url = "example.com"  # 缺少协议部分

try:
    response = requests.get(url)
    soup = BeautifulSoup(response.text, "html.parser")
    # 解析网页内容
except requests.exceptions.MissingSchema:
    # 添加协议部分
    fixed_url = "http://" + url
    response = requests.get(fixed_url)
    soup = BeautifulSoup(response.text, "html.parser")
    # 解析网页内容