我有一个使用总线位置API的脚本,我试图解析作为float对象的lat / lng字段。我一再收到这个错误。
row.append(十进制(项[ '经度']。编码( 'UTF-16'))) AttributeError:'float'对象没有属性'encode'
# IMPORTS
from decimal import *
#Make Python understand how to read things on the Internet
import urllib2
#Make Python understand the stuff in a page on the Internet is JSON
import simplejson as json
from decimal import Decimal
# Make Python understand csvs
import csv
# Make Python know how to take a break so we don't hammer API and exceed rate limit
from time import sleep
# tell computer where to put CSV
outfile_path='C:\Users\Geoffrey\Desktop\pycharm1.csv'
# open it up, the w means we will write to it
writer = csv.writer(open(outfile_path, 'wb'))
#create a list with headings for our columns
headers = ['latitude', 'longitude']
#write the row of headings to our CSV file
writer.writerow(headers)
# GET JSON AND PARSE IT INTO DICTIONARY
# We need a loop because we have to do this for every JSON file we grab
#set a counter telling us how many times we've gone through the loop, this is the first time, so we'll set it at 1
i=1
#loop through pages of JSON returned, 100 is an arbitrary number
while i<100:
#print out what number loop we are on, which will make it easier to track down problems when they appear
print i
#create the URL of the JSON file we want. We search for 'egypt', want English tweets,
#and set the number of tweets per JSON file to the max of 100, so we have to do as little looping as possible
url = urllib2.Request('http://api.metro.net/agencies/lametro/vehicles' + str(i))
#use the JSON library to turn this file into a Pythonic data structure
parsed_json = json.load(urllib2.urlopen('http://api.metro.net/agencies/lametro/vehicles'))
#now you have a giant dictionary.
#Type in parsed_json here to get a better look at this.
#You'll see the bulk of the content is contained inside the value that goes with the key, or label "results".
#Refer to results as an index. Just like list[1] refers to the second item in a list,
#dict['results'] refers to values associated with the key 'results'.
print parsed_json
#run through each item in results, and jump to an item in that dictionary, ex: the text of the tweet
for items in parsed_json['items']:
#initialize the row
row = []
#add every 'cell' to the row list, identifying the item just like an index in a list
#if latitude is not None:
#latitude = str(latitude)
#if longitude is not None:
#longitude = str(longitude)
row.append(Decimal(items['longitude'].encode('utf-16')))
row.append(Decimal(items['latitude'].encode('utf-16')))
#row.append(bool(services['predictable'].unicode('utf-8')))
#once you have all the cells in there, write the row to your csv
writer.writerow(row)
#increment our loop counter, now we're on the next time through the loop
i = i +1
#tell Python to rest for 5 secs, so we don't exceed our rate limit
sleep(5)
答案 0 :(得分:1)
encode
是字符串具有的方法,而不是浮点数。
将row.append(Decimal(items['longitude'].encode('utf-16')))
更改为row.append(Decimal(str(items['longitude']).encode('utf-16')))
,与其他行类似。
答案 1 :(得分:1)
编码仅适用于字符串。在你的情况下,项目['经度']是一个浮点数。 float没有编码方法。您可以键入case然后使用encode。 你可以这样写,
str(items['longitude']).encode('utf-16')
str(items['latitude']).encode('utf-16')
我认为你不能将编码的字符串传递给Decimal对象。