0
import csv
from geopy import geocoders

g = geocoders.Google()

spamReader = csv.reader(open('locations.csv', 'rb'), delimiter='\t', quotechar='|')

for row in spamReader:
    a = ', '.join(row)
    #print a
    place, (lat, lng) = g.geocode(a, exactly_one=False)
    print "%s: %.5f, %.5f" % (place, lat, lng)

location.csv 中的数据如下所示:

6943     Australia
6944     Australia
6945     Australia
6946     Australia
6947     Australia
6951     Australia

出于某种原因,我留下了“太多值无法解包”错误。如果我使用带注释的打印语句,这些值会打印出来。有谁知道为什么会发生这种情况?

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2 回答 2

1

问题exactly_one在于g.geocode. 当我在 shell 中运行它时,我得到:

 >>> g.geocode('6943, Australia', exactly_one=False)
 [(u'Australia 6943, Villafontana, Tijuana Municipality, Baja California, Mexico',
  (32.4988788, -116.8620506)),
 (u'Australia 6943, Castelar, Buenos Aires Province, Argentina',
  (-34.7036339, -58.6423071)),
 (u'Australia 6943, Rosario, Santa Fe Province, Argentina',
  (-32.9913482, -60.6398934)),
 (u'Australia, Lebanon', (33.8879118, 35.4749439)),
 (u'Australia, Juliaca, Peru', (-15.4897806, -70.146677)),
 (u'Australia, Lima District 15007, Peru', (-12.0397296, -76.9944836)),
 (u'Australia, Manila, Philippines', (14.48538, 121.0394822)),
 (u'Australia, Conchal\xed, Santiago Metropolitan Region, Chile',
  (-33.3929606, -70.6780826)),
 (u'Australia, Chiguayante, Biob\xedo Region, Chile',
  (-36.9556346, -73.0145556)),
 (u'Australia, Copiap\xf3, Atacama Region, Chile', (-27.3978776, -70.2934656))]

现在,您正试图将这个大列表分解为 just place, (lat, lng),而实际上它是那些列表;too many values该列表中只有to unpack两个(place(lat, lng)),因为实际上有10个。你可以做类似的事情

for place, (lat, lng) in g.geocode(a, exactly_one=False):
     print place, lat, lng

或做一些其他类型的列表操作或其他。

于 2012-05-27T05:33:15.000 回答
1

g.geocode()返回嵌套元组的列表(place, (lat, lng))。只需使用列表推导将其展平在单级元组列表(place, lat, lng)中,以便像这样进行操作:

data = ((place, lat, lng) for place, (lat, lng) in g.geocode(a, exactly_one=False))
print "\n".join("%s: %.5f, %.5f" % t for t in data)
于 2012-05-27T06:24:18.577 回答