安装完对Scrapy进行测试的时候发现了问题

    1. scrapy -h
    2. Fatal error in launcher: Unable to create process ...

    第一次运行scrapy出现了上面的报错，原因是电脑中安装了多个python版本，所以导致报错。
    解决方法就是指明使用的Python版本就好。我的Win10默认使用anaconda中的Python3，所以直接使用 python -m scrapy -h 命令就可以。不同的版本可以将 python 替换为 python2 或者 python3 进行调用即可

    1. python -m scrapy -h
    2. Scrapy 2.1.0 - no active project
    4. Usage:
    5.   scrapy <command> [options] [args]
    7. Available commands:
    8.   bench         Run quick benchmark test
    9.   fetch         Fetch a URL using the Scrapy downloader
    10.   genspider     Generate new spider using pre-defined templates
    11.   runspider     Run a self-contained spider (without creating a project)
    12.   settings      Get settings values
    13.   shell         Interactive scraping console
    14.   startproject  Create new project
    15.   version       Print Scrapy version
    16.   view          Open URL in browser, as seen by Scrapy
    18.   [ more ]      More commands available when run from project directory
    20. Use "scrapy <command> -h" to see more info about a command