我正在尝试在文档中提供的QuotesSpider示例（第5页，here），但我很难让它运行。我在根环境中安装了conda的scrapy。我在Ubuntu 14.04,64位机器上。只要我使用以下命令运行给定的代码段：
$ scrapy runspider quotes_spider.py -o quotes.json
我收到以下错误：
Traceback (most recent call last):
File "/home/rip/miniconda2/bin/scrapy", line 4, in <module>
import scrapy.cmdline
File "/home/rip/miniconda2/lib/python2.7/site-packages/scrapy/__init__.py", line 34, in <module>
from scrapy.spiders import Spider
File "/home/rip/miniconda2/lib/python2.7/site-packages/scrapy/spiders/__init__.py", line 10, in <module>
from scrapy.http import Request
File "/home/rip/miniconda2/lib/python2.7/site-packages/scrapy/http/__init__.py", line 11, in <module>
from scrapy.http.request.form import FormRequest
File "/home/rip/miniconda2/lib/python2.7/site-packages/scrapy/http/request/form.py", line 9, in <module>
import lxml.html
File "/home/rip/miniconda2/lib/python2.7/site-packages/lxml/html/__init__.py", line 54, in <module>
from .. import etree
ImportError: libiconv.so.2: cannot open shared object file: No such file or directory
很明显，目标文件似乎丢失了。我是否必须从源头构建scrapy，还是有替代方案？