import googlemaps
from datetime import datetime
import os
import csv
import pandas as pd
import matplotlib.pyplot as plt
import math# 将已知的多个txt文件中的内容放到一个CSV文件下
def txt2Csv(dataPath, csvname):fileList = os.listdir(dataPath)csvFile = open(dataPath + '\\' + csvname, 'w+')writer = csv.writer(csvFile)for fileName in fileList:with open(dataPath + '\\' + fileName) as fileObj:lines = fileObj.readlines()for line in lines:line = line.split(',')line[-1] = line[-1][0:-1]writer.writerow((line))csvFile.close()# 根据经纬度获取两地之间的距离及花费的时间
def getDistanceDuration(key, path, csvName):gmaps = googlemaps.Client(key=key)df = pd.read_csv(path + '\\' + csvName)df.columns = ['id', 'time', 'longitude', 'latitude']durationList = []distanceList = []try:for i in range(1, 1000):now = datetime.now()# 调取google API的directions:directions_result = gmaps.directions((df.iloc[i, 3], df.iloc[i, 2]),(df.iloc[i+1, 3], df.iloc[i+1, 2]),mode="driving",departure_time=now)# 按照返回的格式，找出distance及duration，追加到列表中并返回distanceList.append(directions_result[0]['legs'][0]['distance']['value'])durationList.append(directions_result[0]['legs'][0]['duration']['value'])except googlemaps.exceptions._RetriableRequest:passreturn distanceList, durationListpath = 'D:\\Learnning\\python\\scrape\\taxiData\\T-drive Taxi Trajectories\\release\\taxi_log_2008_by_id'
txt2Csv(path, 'geodata.csv')distanceList, durationList = getDistanceDuration('AIzaSyD8X6tJx6Ap5TVHlqwSso8iTwZfDWcFsOA', path, 'geodata.csv')
# 对返回数据的单位做转换， 并使用math.ceil对数据向上取整
distanceList = [math.ceil(dis/1000) for dis in distanceList]
durationList = [math.ceil(dis/60) for dis in durationList]totalDistance = 0
totalDuration = 0
# 计算总路程，并画出每段路程的距离在总路程中的占比:
for distance in distanceList:totalDistance += distance
distancePropo = [distance/totalDistance for distance in distanceList]
plt.bar(distanceList, distancePropo)
plt.title("Distance interval")
plt.xlabel("Km")
plt.ylabel("Proportion")
plt.show()# 计算总时间，并画出每段路程花费的时间在总时间中的占比:
for duration in durationList:totalDuration += duration
durationPropo = [duration/totalDuration for duration in durationList]
plt.bar(durationList, durationPropo)
plt.title("Time interval")
plt.xlabel("Min")
plt.ylabel("Proportion")
plt.show()