python - 没有名为 lxml.html 的模块

Question

运行 OS X 10.9.4，我尝试使用 Scrapy，但收到此错误:

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

并且“pip install lxml”仅返回

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

Answer 1

您似乎使用系统版本的 Python 安装了 scrapy。

当您在 Python 的 virtualenv 版本中安装 lxml 时。

使用以下命令检查您的 pip 引用哪个 python:

pip -V

---

如果你想在virtualenv中安装scapy，你需要先卸载scrapy。否则会因为 PATH 问题而阻止 virtualenv 版本的运行。

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