win7安装python爬虫框架scrapy全纪录

1、安装Python（建议32位）##

建议安装Python2.7.x，3.x貌似还不支持。
安装完了记得配置环境，将python目录和python目录下的Scripts目录添加到系统环境变量的Path里。
在cmd中输入python如果出现版本信息说明配置完毕。

2、安装setuptools##

用来安装egg文件，点击这里下载python2.7的对应版本的setuptools。

3、安装lxml##

lxml是一种使用 Python 编写的库，可以迅速、灵活地处理 XML。点击这里选择对应的Python版本安装。也可以命令行下输入

easy-install lxml

4、安装zope.interface##

可以使用第三步下载的setuptools来安装egg文件，

easy-install zope.interface

现在也有exe版本，点击这里下载。

5、安装Twisted##

Twisted是用Python实现的基于事件驱动的网络引擎框架，点击这里下载。

easy-install Twisted

6、安装pyOpenSSL##

pyOpenSSL是Python的OpenSSL接口，点击这里下载。也可以

easy_install pyOpenSSL==0.13

7、安装win32py##

提供win32api，点击这里下载
安装win32api可能遇到python version 2.7 required 错误，这是需要将如下代码保存为一个文件register.py

#
# script to register Python 2.0 or later for use with win32all
# and other extensions that require Python registry settings
#
# written by Joakim Loew for Secret Labs AB / PythonWare
#
# source:
# http://www.pythonware.com/products/works/articles/regpy20.htm
#
# modified by Valentine Gogichashvili as described in http://www.mail-archive.com/distutils-sig@python.org/msg10512.html
 
import sys
 
from _winreg import *
 
# tweak as necessary
version = sys.version[:3]
installpath = sys.prefix
 
regpath = "SOFTWARE\Python\Pythoncore\%s\" % (version)
installkey = "InstallPath"
pythonkey = "PythonPath"
pythonpath = "%s;%s\Lib\;%s\DLLs\" % (
    installpath, installpath, installpath
)
 
def RegisterPy():
    try:
        reg = OpenKey(HKEY_CURRENT_USER, regpath)
    except EnvironmentError as e:
        try:
            reg = CreateKey(HKEY_CURRENT_USER, regpath)
            SetValue(reg, installkey, REG_SZ, installpath)
            SetValue(reg, pythonkey, REG_SZ, pythonpath)
            CloseKey(reg)
        except:
            print "*** Unable to register!"
            return
        print "--- Python", version, "is now registered!"
        return
    if (QueryValue(reg, installkey) == installpath and
        QueryValue(reg, pythonkey) == pythonpath):
        CloseKey(reg)
        print "=== Python", version, "is already registered!"
        return
    CloseKey(reg)
    print "*** Unable to register!"
    print "*** You probably have another Python installation!"
 
if __name__ == "__main__":
    RegisterPy()

然后命令行下执行

python register.py

即可注册python2.7

8、安装Scrapy##

终于到了激动人心的时候了！安装了那么多小部件之后终于轮到主角登场。
直接在cmd中输入easy_install scrapy回车即可。
出现如下错误

error: Setup script exited with error: Microsoft Visual C++ 9.0 is required (Unable to find vcvarsall.bat). Get it from
http://aka.ms/vcpython27

解决办法的前提是，系统中必须安装了vs的相关版本。

For Windows installations:

While running setup.py for package installations, Python 2.7 searches for an installed Visual Studio 2008. You can trick Python to use a newer Visual Studio by setting the correct path in VS90COMNTOOLS environment variable before calling setup.py.

If you have Visual Studio 2010 installed, execute

SET VS90COMNTOOLS=%VS100COMNTOOLS%

or with Visual Studio 2012 installed (Visual Studio Version 11)

SET VS90COMNTOOLS=%VS110COMNTOOLS%

or with Visual Studio 2013 installed (Visual Studio Version 12)

SET VS90COMNTOOLS=%VS120COMNTOOLS%

9、检查安装##

打开一个cmd窗口，在任意位置执行scrapy命令，得到下列页面，表示环境配置成功。

Scrapy 0.24.4 - no active project

Usage:
  scrapy <command> [options] [args]

Available commands:
  bench         Run quick benchmark test
  fetch         Fetch a URL using the Scrapy downloader
  runspider     Run a self-contained spider (without creating a project)
  settings      Get settings values
  shell         Interactive scraping console
  startproject  Create new project
  version       Print Scrapy version
  view          Open URL in browser, as seen by Scrapy

  [ more ]      More commands available when run from project directory

Use "scrapy <command> -h" to see more info about a command