1.首先使用 pip install scrapy命令安装，快安装完成的时候报了一堆红色错误，
底部提示
You are using pip version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
照着命令输入pip install --upgrade pip，还是提示这个命令，后来在命令后面加入了--user，就更新成功了
命令如下：pip install --upgrade pip --user 或者使用如下命令python -m pip install -U pip
3.再次输入pip install scrapy命令安装时，居然报错'module' object is not callable
这就很奇怪了啊，不知道什么原因，也许是pip还是没安装成功，或者是其他什么原因，只能重新安装了
4.解决方法：输入命令：easy_install pip
此时提示我没权限，直接找到cmd.exe文件，右键管理员身份运行，再执行命令，easy_install pip
Searching for pip
Best match: pip 19.3.1
Adding pip 19.3.1 to easy-install.pth file
Installing pip-script.py script to c:\program files\python37\Scripts
Installing pip.exe script to c:\program files\python37\Scripts
Installing pip3-script.py script to c:\program files\python37\Scripts
Installing pip3.exe script to c:\program files\python37\Scripts
Installing pip3.7-script.py script to c:\program files\python37\Scripts
Installing pip3.7.exe script to c:\program files\python37\Scripts
再输入命令：pip install --upgrade pip
Requirement already up-to-date: pip in /usr/local/lib/python2.7/dist-packages
此时再安装pip install scrapy，就安装成功了