编写代码，使用百度地图api可视化显示大连市各区域学校数量

以下是使用Python编写的代码，需要安装百度地图API的Python SDK和pandas库：

import requests
import pandas as pd
from urllib.parse import quote_plus

# 设置百度地图API的ak
ak = '你的百度地图AK'

# 获取大连市各区县名称
url = 'http://api.map.baidu.com/place/v2/suggestion'
params = {
    'query': '大连市',
    'region': '大连市',
    'city_limit': 'true',
    'output': 'json',
    'ak': ak
}
response = requests.get(url, params=params)
city_code = response.json()['result'][0]['cityCode']
url = 'http://api.map.baidu.com/place/v2/suggestion'
params = {
    'query': '大连市',
    'region': city_code,
    'output': 'json',
    'ak': ak
}
response = requests.get(url, params=params)
districts = [d['name'] for d in response.json()['result']]

# 获取各区县学校数量
schools = []
for district in districts:
    url = 'http://api.map.baidu.com/place/v2/search'
    params = {
        'query': '学校',
        'region': district,
        'output': 'json',
        'ak': ak
    }
    response = requests.get(url, params=params)
    count = response.json()['total']
    schools.append(count)

# 将数据保存到csv文件
data = pd.DataFrame({'district': districts, 'count': schools})
data.to_csv('schools.csv', index=False)

# 使用百度地图API可视化显示各区县学校数量
url = 'http://api.map.baidu.com/place/v2/search'
params = {
    'query': '大连市',
    'region': '大连市',
    'output': 'html',
    'ak': ak
}
response = requests.get(url, params=params)
html = response.text
for i, row in data.iterrows():
    html = html.replace(quote_plus(row['district']), quote_plus(row['district'] + '（' + str(row['count']) + '）'))
with open('schools.html', 'w') as f:
    f.write(html)

代码执行后，会生成两个文件：schools.csv和schools.html。schools.csv保存了各区县学校数量数据，schools.html是可视化显示的网页，各区县名称后面的括号中是该区县学校的数量。可以用浏览器打开schools.html查看结果。