干货 | Python调用百度地图API获取各点的经纬度信息（两种方式）

#coding: utf-8
import requests
import json
import time
import csv
"""
    查询关键字：
"""
FileKey = 'preclass'
KeyWord = u"便利店"
"""
    关注区域的左下角和右上角百度地图坐标(经纬度）
"""
BigRect = {
    'left': {
        'x': 114.239392,
        'y': 30.471019
    },
    'right': {
        'x': 114.385995,
        'y': 30.638208
    }
}
"""
    定义细分窗口的数量，横向X * 纵向Y
"""
WindowSize = {
    'xNum': 10.0,
    'yNum': 10.0
}
"""
获取AK
:return: str
"""
def getBaiduApiAk():
    return "申请的AK"
def getSmallRect(bigRect, windowSize, windowIndex):
    """
    获取小矩形的左上角和右下角坐标字符串（百度坐标系）
    :param bigRect: 关注区域坐标信息
    :param windowSize:  细分窗口数量信息
    :param windowIndex:  Z型扫描的小矩形索引号
    :return: lat,lng,lat,lng
    """
    offset_x = (bigRect['right']['x'] - bigRect['left']['x'])/windowSize['xNum']
    offset_y = (bigRect['right']['y'] - bigRect['left']['y'])/windowSize['yNum']
    left_x = bigRect['left']['x'] + offset_x * (windowIndex % windowSize['xNum'])
    left_y = bigRect['left']['y'] + offset_y * (windowIndex // windowSize['yNum'])
    right_x = (left_x + offset_x)
    right_y = (left_y + offset_y)
    return str(left_y) + ',' + str(left_x) + ',' + str(right_y) + ',' + str(right_x)
def requestBaiduApi(keyWords, smallRect, baiduAk, index, fileKey, count):
    today = time.strftime("%Y-%m-%d")
    pageNum = 0
    logfile = open("./" + fileKey + "-" + today + ".log", 'a+', encoding='utf-8')
    file_csv = open('testdata.csv', 'w+', encoding='utf-8',newline='')  # 追加
    writer = csv.writer(file_csv)
    writer.writerow(["no","area","name","lat","lng"])
    # print('-------------')
    # print(index)
    while True:
        try:
            URL = "http://api.map.baidu.com/place/v2/search?query=" + keyWords + \
                "&bounds=" + smallRect + \
                "&output=json" +  \
                "&ak=" + baiduAk + \
                "&scope=1" + \
                "&page_size=20" + \
                "&page_num=" + str(pageNum)
            print(pageNum)
            print(URL)
            resp = requests.get(URL)
            res = json.loads(resp.text)
            # print(resp.text.strip())
            if len(res['results']) == 0:
                logfile.writelines(time.strftime("%Y%m%d%H%M%S") + " stop " + str(index) + " " + smallRect + " " + str(pageNum) + '\n')
                break
            else:
                for r in res['results']:
                    # print(r)
                    count += 1
                    city_area = r['city'] + r['area']
                    shop_name = r['name']
                    shop_lat = str(r['location']['lat'])
                    shop_lng = str(r['location']['lng'])
                    writer.writerow([str(count), city_area, shop_name, shop_lat, shop_lng])
            pageNum += 1
            time.sleep(1)
        except:
            print("except")
            logfile.writelines(time.strftime("%Y%m%d%H%M%S") + " except "  + str(index) + " " + smallRect + " " + str(pageNum) + '\n')
            break
    return count
def main():
    baiduAk = getBaiduApiAk()
    count = 0
    for index in range(int(WindowSize['xNum'] * WindowSize['yNum'])):
        smallRect = getSmallRect(BigRect, WindowSize, index)
        count = requestBaiduApi(keyWords=KeyWord, smallRect=smallRect, baiduAk=baiduAk, index=index, fileKey=FileKey,count= count)
        time.sleep(1)
        print(str(count))
if __name__ == '__main__':
    main()