以下是我個人在安裝scrapy時遇見的問題及我的解決方法

(1)執行命令

pip install Scrapy

在執行到“Collecting Twisted>=13.1.0 (from Scrapy)”時報錯：Exception:Traceback (most recent call last).....

原因：我當前的版本是pip 9.0.1，需要升級到9.0.3

執行命令：

python -m pip install --upgrade pip

(2)升級後再次執行

pip install Scrapy

報錯：Command "python setup.py egg_info" failed with error code 1 in C:\Users\LUOXIA~1\AppData\Local\Temp\pip-build-5hi6welx\Twisted\Complete output from command python setup.py egg_info:

原因：setup.py的版本問題

執行命令：

pip install setuptools==33.1.1

(3)再次執行

pip install Scrapy

報錯“Command ""c:\program files\python36\python.exe" -u -c "import setuptools, tokenize;__file__='C:\\Users\\LUOXIA~1\\AppData\\Local\\Temp\\pip-build-rdyp2fl9\\Twisted\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\LUOXIA~1\AppData\Local\Temp\pip-pge7_20d-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\LUOXIA~1\AppData\Local\Temp\pip-build-rdyp2fl9\Twisted\”

解決方法：下載安裝twisted對應版本的whl檔案，比如：我的是Twisted-17.9.0-cp36-cp36m-win_amd64.whl，cp後面是python版本，amd64代表64位

執行命令：

pip install F:\python\mytool\Twisted-17.9.0-cp36-cp36m-win_amd64.whl

其中install後面為下載的whl檔案的完整路徑名

(4)安裝完成後，再次執行：

pip install Scrapy

報錯：Collecting pyasn1 (from service-identity->Scrapy)

  Could not find a version that satisfies the requirement pyasn1 (from service-identity->Scrapy) (from versions: )
No matching distribution found for pyasn1 (from service-identity->Scrapy)

原因：缺少pyasn1

執行命令：

pip install pyasn1

pip install Scrapy