如何在win7x64系统中安装Scrapy-创新互联
如何在win7 x64系统中安装Scrapy？相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
首先安装python，装完以后就可以安装scrapy了，推荐使用pip方式安装，因为scrapy需要调用很多额外的库,pip会全部帮你安装好，不需要你在到处翻找了。
pip在python安装完后就已经有了，不需要额外安装，下面只要按照scrapy官网推荐的方法在命令提示符中输入pip installscrapy
图1
装完以后可以敲入命令pip list看看已安装的库（图2），出来很多啊，pip真是好东西。
图2
现在试下看看建个爬虫项目，按照说明文档键入命令scrapy startproject tutorial，目录已经出来（图3），看来是没问题了。但为了验证是否安装成功，还得跑一下看看，第一次创建项目的时候，系统会提示可以跑个例子看看（图4）。按照提示键入命令
图3
图4
scrapy genspider example example.com创建一个爬虫，再键入命令scrapy crawl example
运行爬虫，结果如下（图5），报错了，貌似是缺少win32api，立即上网下了一个（http://sourceforge.net/projects/pywin32/files/pywin32/Build%20219/），
图5
下的时候注意对应的python版本。win32api装好以后再运行一次爬虫（图6），这次成功了，应该是没问题了。
图6
总结一下，其实刚开始网上找资料的时候看到上面写的要先装这个库那个库的时候心中很忐忑，结果发现不是很复杂，大多数问题pip都给解决了，剩下的就是具体问题具体研究，不过也没碰到很复杂解决不了的问题。另外吐下槽就是网上的教程互抄的太厉害，看着一搜一堆，其实多数都大同小异，真正有价值的没几个，没大腿抱就是辛苦呀。
最后说一下，scrapy目前还不支持python3.x版本，我用的是python2.7，如果你碰到莫名其妙的问题时请先看看自己有没有装错python版本。
下面是其他网友补充的文章
环境
Windows7 64位
Python2.7.6 64位
Python的安装：
打开http://www.python.org/getit/releases/2.7.6/页面，下载Python-2.7.6.amd64.msi 进行安装，安装完成后，需要配置环境变量，环境变量的配置可以参考该文章
测试python是否安装成功，如果python成功安装并且配置好环境变量，那么在cmd中输入python，就能得到python版本的详细信息（如32位或64位）
C:\Users\Administrator>python Python 2.7.6 (default, Nov 10 2013, 19:24:24) [MSC v.1500 64 bit (AMD64)] on win 32
easy_install的安装
保存ez_setup.py至本地，如D盘(如果失效了，可以参考下https://www.jb51.net/article/151027.htm
#!/usr/bin/env python
"""
Setuptools bootstrapping installer.
Maintained at https://github.com/pypa/setuptools/tree/bootstrap.
Run this script to install or upgrade setuptools.
This method is DEPRECATED. Check https://github.com/pypa/setuptools/issues/581 for more details.
"""
import os
import shutil
import sys
import tempfile
import zipfile
import optparse
import subprocess
import platform
import textwrap
import contextlib
from distutils import log
try:
from urllib.request import urlopen
except ImportError:
from urllib2 import urlopen
try:
from site import USER_SITE
except ImportError:
USER_SITE = None
# 33.1.1 is the last version that supports setuptools self upgrade/installation.
DEFAULT_VERSION = "33.1.1"
DEFAULT_URL = "https://pypi.io/packages/source/s/setuptools/"
DEFAULT_SAVE_DIR = os.curdir
DEFAULT_DEPRECATION_MESSAGE = "ez_setup.py is deprecated and when using it setuptools will be pinned to {0} since it's the last version that supports setuptools self upgrade/installation, check https://github.com/pypa/setuptools/issues/581 for more info; use pip to install setuptools"
MEANINGFUL_INVALID_ZIP_ERR_MSG = 'Maybe {0} is corrupted, delete it and try again.'
log.warn(DEFAULT_DEPRECATION_MESSAGE.format(DEFAULT_VERSION))
def _python_cmd(*args):
"""
Execute a command.
Return True if the command succeeded.
"""
args = (sys.executable,) + args
return subprocess.call(args) == 0
def _install(archive_filename, install_args=()):
"""Install Setuptools."""
with archive_context(archive_filename):
# installing
log.warn('Installing Setuptools')
if not _python_cmd('setup.py', 'install', *install_args):
log.warn('Something went wrong during the installation.')
log.warn('See the error message above.')
# exitcode will be 2
return 2
def _build_egg(egg, archive_filename, to_dir):
"""Build Setuptools egg."""
with archive_context(archive_filename):
# building an egg
log.warn('Building a Setuptools egg in %s', to_dir)
_python_cmd('setup.py', '-q', 'bdist_egg', '--dist-dir', to_dir)
# returning the result
log.warn(egg)
if not os.path.exists(egg):
raise IOError('Could not build the egg.')
class ContextualZipFile(zipfile.ZipFile):
"""Supplement ZipFile class to support context manager for Python 2.6."""
def __enter__(self):
return self
def __exit__(self, type, value, traceback):
self.close()
def __new__(cls, *args, **kwargs):
"""Construct a ZipFile or ContextualZipFile as appropriate."""
if hasattr(zipfile.ZipFile, '__exit__'):
return zipfile.ZipFile(*args, **kwargs)
return super(ContextualZipFile, cls).__new__(cls)
@contextlib.contextmanager
def archive_context(filename):
"""
Unzip filename to a temporary directory, set to the cwd.
The unzipped target is cleaned up after.
"""
tmpdir = tempfile.mkdtemp()
log.warn('Extracting in %s', tmpdir)
old_wd = os.getcwd()
try:
os.chdir(tmpdir)
try:
with ContextualZipFile(filename) as archive:
archive.extractall()
except zipfile.BadZipfile as err:
if not err.args:
err.args = ('', )
err.args = err.args + (
MEANINGFUL_INVALID_ZIP_ERR_MSG.format(filename),
)
raise
# going in the directory
subdir = os.path.join(tmpdir, os.listdir(tmpdir)[0])
os.chdir(subdir)
log.warn('Now working in %s', subdir)
yield
finally:
os.chdir(old_wd)
shutil.rmtree(tmpdir)
def _do_download(version, download_base, to_dir, download_delay):
"""Download Setuptools."""
py_desig = 'py{sys.version_info[0]}.{sys.version_info[1]}'.format(sys=sys)
tp = 'setuptools-{version}-{py_desig}.egg'
egg = os.path.join(to_dir, tp.format(**locals()))
if not os.path.exists(egg):
archive = download_setuptools(version, download_base,
to_dir, download_delay)
_build_egg(egg, archive, to_dir)
sys.path.insert(0, egg)
# Remove previously-imported pkg_resources if present (see
# https://bitbucket.org/pypa/setuptools/pull-request/7/ for details).
if 'pkg_resources' in sys.modules:
_unload_pkg_resources()
import setuptools
setuptools.bootstrap_install_from = egg
def use_setuptools(
version=DEFAULT_VERSION, download_base=DEFAULT_URL,
to_dir=DEFAULT_SAVE_DIR, download_delay=15):
"""
Ensure that a setuptools version is installed.
Return None. Raise SystemExit if the requested version
or later cannot be installed.
"""
to_dir = os.path.abspath(to_dir)
# prior to importing, capture the module state for
# representative modules.
rep_modules = 'pkg_resources', 'setuptools'
imported = set(sys.modules).intersection(rep_modules)
try:
import pkg_resources
pkg_resources.require("setuptools>=" + version)
# a suitable version is already installed
return
except ImportError:
# pkg_resources not available; setuptools is not installed; download
pass
except pkg_resources.DistributionNotFound:
# no version of setuptools was found; allow download
pass
except pkg_resources.VersionConflict as VC_err:
if imported:
_conflict_bail(VC_err, version)
# otherwise, unload pkg_resources to allow the downloaded version to
# take precedence.
del pkg_resources
_unload_pkg_resources()
return _do_download(version, download_base, to_dir, download_delay)
def _conflict_bail(VC_err, version):
"""
Setuptools was imported prior to invocation, so it is
unsafe to unload it. Bail out.
"""
conflict_tmpl = textwrap.dedent("""
The required version of setuptools (>={version}) is not available,
and can't be installed while this script is running. Please
install a more recent version first, using
'easy_install -U setuptools'.
(Currently using {VC_err.args[0]!r})
""")
msg = conflict_tmpl.format(**locals())
sys.stderr.write(msg)
sys.exit(2)
def _unload_pkg_resources():
sys.meta_path = [
importer
for importer in sys.meta_path
if importer.__class__.__module__ != 'pkg_resources.extern'
]
del_modules = [
name for name in sys.modules
if name.startswith('pkg_resources')
]
for mod_name in del_modules:
del sys.modules[mod_name]
def _clean_check(cmd, target):
"""
Run the command to download target.
If the command fails, clean up before re-raising the error.
"""
try:
subprocess.check_call(cmd)
except subprocess.CalledProcessError:
if os.access(target, os.F_OK):
os.unlink(target)
raise
def download_file_powershell(url, target):
"""
Download the file at url to target using Powershell.
Powershell will validate trust.
Raise an exception if the command cannot complete.
"""
target = os.path.abspath(target)
ps_cmd = (
"[System.Net.WebRequest]::DefaultWebProxy.Credentials = "
"[System.Net.CredentialCache]::DefaultCredentials; "
'(new-object System.Net.WebClient).DownloadFile("%(url)s", "%(target)s")'
% locals()
)
cmd = [
'powershell',
'-Command',
ps_cmd,
]
_clean_check(cmd, target)
def has_powershell():
"""Determine if Powershell is available."""
if platform.system() != 'Windows':
return False
cmd = ['powershell', '-Command', 'echo test']
with open(os.path.devnull, 'wb') as devnull:
try:
subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
except Exception:
return False
return True
download_file_powershell.viable = has_powershell
def download_file_curl(url, target):
cmd = ['curl', url, '--location', '--silent', '--output', target]
_clean_check(cmd, target)
def has_curl():
cmd = ['curl', '--version']
with open(os.path.devnull, 'wb') as devnull:
try:
subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
except Exception:
return False
return True
download_file_curl.viable = has_curl
def download_file_wget(url, target):
cmd = ['wget', url, '--quiet', '--output-document', target]
_clean_check(cmd, target)
def has_wget():
cmd = ['wget', '--version']
with open(os.path.devnull, 'wb') as devnull:
try:
subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
except Exception:
return False
return True
download_file_wget.viable = has_wget
def download_file_insecure(url, target):
"""Use Python to download the file, without connection authentication."""
src = urlopen(url)
try:
# Read all the data in one block.
data = src.read()
finally:
src.close()
# Write all the data in one block to avoid creating a partial file.
with open(target, "wb") as dst:
dst.write(data)
download_file_insecure.viable = lambda: True
def get_best_downloader():
downloaders = (
download_file_powershell,
download_file_curl,
download_file_wget,
download_file_insecure,
)
viable_downloaders = (dl for dl in downloaders if dl.viable())
return next(viable_downloaders, None)
def download_setuptools(
version=DEFAULT_VERSION, download_base=DEFAULT_URL,
to_dir=DEFAULT_SAVE_DIR, delay=15,
downloader_factory=get_best_downloader):
"""
Download setuptools from a specified location and return its filename.
`version` should be a valid setuptools version number that is available
as an sdist for download under the `download_base` URL (which should end
with a '/'). `to_dir` is the directory where the egg will be downloaded.
`delay` is the number of seconds to pause before an actual download
attempt.
``downloader_factory`` should be a function taking no arguments and
returning a function for downloading a URL to a target.
"""
# making sure we use the absolute path
to_dir = os.path.abspath(to_dir)
zip_name = "setuptools-%s.zip" % version
url = download_base + zip_name
saveto = os.path.join(to_dir, zip_name)
if not os.path.exists(saveto): # Avoid repeated downloads
log.warn("Downloading %s", url)
downloader = downloader_factory()
downloader(url, saveto)
return os.path.realpath(saveto)
def _build_install_args(options):
"""
Build the arguments to 'python setup.py install' on the setuptools package.
Returns list of command line arguments.
"""
return ['--user'] if options.user_install else []
def _parse_args():
"""Parse the command line for options."""
parser = optparse.OptionParser()
parser.add_option(
'--user', dest='user_install', action='store_true', default=False,
help='install in user site package')
parser.add_option(
'--download-base', dest='download_base', metavar="URL",
default=DEFAULT_URL,
help='alternative URL from where to download the setuptools package')
parser.add_option(
'--insecure', dest='downloader_factory', action='store_const',
const=lambda: download_file_insecure, default=get_best_downloader,
help='Use internal, non-validating downloader'
)
parser.add_option(
'--version', help="Specify which version to download",
default=DEFAULT_VERSION,
)
parser.add_option(
'--to-dir',
help="Directory to save (and re-use) package",
default=DEFAULT_SAVE_DIR,
)
options, args = parser.parse_args()
# positional arguments are ignored
return options
def _download_args(options):
"""Return args for download_setuptools function from cmdline args."""
return dict(
version=options.version,
download_base=options.download_base,
downloader_factory=options.downloader_factory,
to_dir=options.to_dir,
)
def main():
"""Install or upgrade setuptools and EasyInstall."""
options = _parse_args()
archive = download_setuptools(**_download_args(options))
return _install(archive, _build_install_args(options))
if __name__ == '__main__':
sys.exit(main())在cmd中运行：
d:\>python ez_setup.py
进行SetupTools的安装
在运行的时候会发生一个错误，该错误为"ascii codec can't decode byte 0xe8 in position 0:ordinal not in range(128)",大意为ascii编码不能解析byte 0xe8。
解决方法：找到并打开python根目录/Lib/mimetypes.py文件，在import urllib后，添加代码:
reload(sys)
sys.setdefaultencoding('gbk')把默认编码方式改为gbk（网上有写用utf8的，在这个脚本中是无效的，需要改成gbk格式）。重新执行python ez_setup.py，如果出现刷屏的安装信息，则说明安装成功了。此时，在python目录下多了一个Script文件夹，easy_install就在里面
Scrapy依赖项的安装
Scrapy的依赖项
安装lxml-3.2.4.win32-py2.7.exe(64位系统需要安装lxml-3.2.4.win-amd64-py2.7.exe)
安装pywin32-218.win32-py2.7.exe(64位系统需要安装pywin32-218.win-amd64-py2.7.exe)
安装Twisted-13.2.0.win32-py2.7.exe(64位系统需要安装Twisted-13.2.0.win-amd64-py2.7.exe)
安装pyOpenSSL-0.13.1.win32-py2.7.exe(64位系统需要安装pyOpenSSL-0.13.1.win-amd64-py2.7.exe)
将zope.interface-4.0.5-py2.7-win32.egg拷贝到C:\Python27\Scripts目录下，执行$ easy_install.exe zope.interface-4.0.5-py2.7-win32.egg
验证scrapy依赖项是否安装成功的方法：
cmd执行$ python进入python控制台
执行import lxml，如果没报错，则说明lxml安装成功
执行import twisted，如果没报错，则说明twisted安装成功
执行import OpenSSL，如果没报错，则说明OpenSSL安装成功
执行import zope.interface，如果没报错，则说明zope.interface安装成功
如果安装成功，那么在cmd中执行& python，然后执行import lxml，如果没有报错，则说明lxml安装成功。
安装Scrapy
方法1： 控制台输入：easy_install scrapy
方法2：解压缩Scrapy-0.22.2.tar.gz，在其目录下执行$ python setup.py install进行Scrapy的安装。
检查Scrapy是否安装成功的方法：可以在cmd控制台执行 $ scrapy ，如果没有报错，说明安装成功。
看完上述内容，你们掌握如何在win7 x64系统中安装Scrapy的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注创新互联成都网站设计公司行业资讯频道，感谢各位的阅读！
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