Question

我已经尝试实现基于地理位置的流式传输的代码并获得相同的代码，但我不断收到错误＆＃34;全球名称＆＃39; requeststid＆＃39;没有定义。＆＃34; 编写的代码如下：

# Geolocation twitter crawler using streaming API
import os
import sys
import math
import time
from datetime import datetime
import simplejson as json
from tweepy import Stream
from tweepy import OAuthHandler
from tweepy.streaming import StreamListener
from geopy import geocoders

adress = str(sys.argv[1])  # Location (City name, adress...)
halfradius = float(sys.argv[2])  # Radius in Km of the Bounding Box
outputlocation = str(sys.argv[3])
datereq = datetime.utcnow().strftime("%d%m%Y")
access_token = "749913608-Z9LiTN6xv7PluHoyNn3Ggot4rnkGObr2OVZsmv5i"
access_token_secret = "wKK0BWG1dXdNBKAVPCeasbtqQI4W3Vf0jCusRIhu6LKla"
consumer_key = "f9CE9GjsMCioQ8NnTEJXn4IxE"
consumer_secret = "a53Ro5lCnsYG6Lq0jW3J6ulEMzy3HQYKknRqUnvdhJFdbsPAuy"


class listener(StreamListener):

    def on_data(self, data):
        data = json.loads(data)
        logfile = open(os.path.join(outputlocation, adress + "-" + datereq + "-
Request" + str(requestid) + ".csv"), "a")

        tweet_date = unicode(data['created_at']).encode("ascii", "ignore")[:10] + " " + unicode(data['created_at']).encode("ascii", "ignore")[-4:]
        tweet_time = unicode(data['created_at']).encode("ascii", "ignore")[11:-11]
        user_id = unicode(data['user']['id']).encode("ascii", "ignore")
        text_id = unicode(data['id']).encode("ascii", "ignore")
        user_location = unicode(data['user']
['location']).encode("ascii", "ignore")

        user_lang = unicode(data['user']['lang']).encode("ascii", "ignore")
        text_msg = unicode(data['text']).encode("utf8", "ignore").replace(',', ' ')

        if data['coordinates'] == None :
            # print >>logfile, '[No geotag for this tweet]'
            print '[No geotag for this tweet]'
            longitude = ""
            latitude = ""

        else:
            coord = unicode(data['coordinates']['coordinates']).encode("ascii", "ignore")
            longitude = coord[:coord.rfind(',')].replace("[", "")
            latitude = coord.split(" ")[1].replace("]", "")
            stream_log = longitude + "," + latitude + "," + tweet_date + "," + tweet_time + "," + user_id + "," + user_location + "," + user_lang + "," + text_id + "," + text_msg
            stream_log = stream_log.replace('\n', ' ')
            print stream_log
            print >> logfile, stream_log
        logfile.close()
        return True

    def on_error(self, statut):
        print statut

# degrees to radians
def deg2rad(degrees):
    return math.pi * degrees / 180.0

# radians to degrees
def rad2deg(radians):
    return 180.0 * radians / math.pi

# Semi-axes of WGS-84 geoidal reference
WGS84_a = 6378137.0  # Major semiaxis [m]
WGS84_b = 6356752.3  # Minor semiaxis [m]

# Earth radius at a given latitude, according to the WGS-84 ellipsoid [m]
def WGS84EarthRadius(lat):
    # http://en.wikipedia.org/wiki/Earth_radius
    An = WGS84_a * WGS84_a * math.cos(lat)
    Bn = WGS84_b * WGS84_b * math.sin(lat)
    Ad = WGS84_a * math.cos(lat)
    Bd = WGS84_b * math.sin(lat)
    return math.sqrt((An * An + Bn * Bn) / (Ad * Ad + Bd * Bd))

# Bounding box surrounding the point at given coordinates,
# assuming local approximation of Earth surface as a sphere
# of radius given by WGS84
def boundingBox(latitudeInDegrees, longitudeInDegrees, halfSideInKm):
    lat = deg2rad(latitudeInDegrees)
    lon = deg2rad(longitudeInDegrees)
    halfSide = 1000 * halfSideInKm

    # Radius of Earth at given latitude
    radius = WGS84EarthRadius(lat)

    # Radius of the parallel at given latitude
    pradius = radius * math.cos(lat)
    latMin = lat - halfSide / radius
    latMax = lat + halfSide / radius
    lonMin = lon - halfSide / pradius
    lonMax = lon + halfSide / pradius
    return (rad2deg(latMin), rad2deg(lonMin), rad2deg(latMax), rad2deg(lonMax))

def main():
    g = geocoders.GoogleV3()
    place, (lat, lng) = g.geocode(adress)
    location = [boundingBox(lng, lat, halfradius)
[0], boundingBox(lng, lat, halfradius)[1], boundingBox(lng, lat, halfradius)[2], boundingBox(lng, lat, halfradius)[3]]

    # print "Location of "+ adress+" :",lng,lat
    auth = OAuthHandler(consumer_key, consumer_secret)
    auth.set_access_token(access_token, access_token_secret)
    twitterStream = Stream(auth, listener())
    twitterStream.filter(locations=location)

main()

Answer 1

requestid未按指示定义。我对这段代码一无所知;但是，请求捆绑在收到的JSON数据包中吗？如果是这样，在使用它之前从中提取它以在on_data（...）方法中构建csv文件名。

全局变量未定义错误

1 个答案: