沒有名為lxml.html的模塊

Question

運行OS X 10.9.4，我正在嘗試使用Scrapy，但出現此錯誤：

Traceback (most recent call last):
File "/usr/local/bin/scrapy", line 3, in <module>
from scrapy.cmdline import execute
File "/Library/Python/2.7/site-packages/scrapy/cmdline.py", line 8, in <module>
from scrapy.crawler import CrawlerProcess
File "/Library/Python/2.7/site-packages/scrapy/crawler.py", line 6, in <module>
from scrapy.core.engine import ExecutionEngine
File "/Library/Python/2.7/site-packages/scrapy/core/engine.py", line 14, in <module>
from scrapy.core.downloader import Downloader
File "/Library/Python/2.7/site-packages/scrapy/core/downloader/__init__.py", line 13, in <module>
from .middleware import DownloaderMiddlewareManager
File "/Library/Python/2.7/site-packages/scrapy/core/downloader/middleware.py", line 7, in <module>
from scrapy.http import Request, Response
File "/Library/Python/2.7/site-packages/scrapy/http/__init__.py", line 11, in <module>
from scrapy.http.request.form import FormRequest
File "/Library/Python/2.7/site-packages/scrapy/http/request/form.py", line 9, in <module>
import lxml.html

而“ pip install lxml”僅返回

/Users/username/.virtualenvs/scraper/lib/python2.7/site-packages

Answer 1

似乎您使用Python的系統版本安裝了scrapy 。

在Python的virtualenv版本中安裝lxml時。

使用以下命令檢查您的pip參考哪個python：

pip -V

---

如果要在virtualenv中安裝scapy ，則需要先卸載scrapy 。 否則，由於PATH問題，它將阻止運行virtualenv版本。

deactive  # deactive first, to use system version of python/pip
pip uninstall -y scrapy
hash -r   # refresh program location.