pip hash 命令用于计算本地包归档的 sha 值

语法格式

pip hash [options] <file> ...

该命令可以和 requirements.txt 文件中的 --hash 一起使用以进行可重复安装

简介

pip hash 命令可以很方便的获取散列摘要以便与散列检查模式一起使用，尤其适用于具有多个归档的包

pip install --require-hashes ... 安装一个包时产生的错误消息中会包含一个哈希值，但如果存在多个存档( 如源和二进制存档 ) ，则需要手动下载并计算其它存档的哈希值

否则，在命令 pip install 中传递一组不同的选项 ( 如 --no-binary ) 时，可能会发生虚假的哈希不匹配

选项

• -a, --algorithm <algorithm>

  摘要算法，可选的值有 sha256, sha384, sha512

范例

1. 下载 requests

   $ pip download requests
   Looking in indexes: https://pypi.douban.com/simple
   Collecting requests
     Downloading https://pypi.doubanio.com/packages/65/47/7e02164a2a3db50ed6d8a6ab1d6d60b69c4c3fdf57a284257925dfc12bda/requests-2.19.1-py2.py3-none-any.whl (91kB)
       100% |████████████████████████████████| 92kB 3.3MB/s 
     Saved ./requests-2.19.1-py2.py3-none-any.whl
   Collecting idna<2.8,>=2.5 (from requests)
     Downloading https://pypi.doubanio.com/packages/4b/2a/0276479a4b3caeb8a8c1af2f8e4355746a97fab05a372e4a2c6a6b876165/idna-2.7-py2.py3-none-any.whl (58kB)
       100% |████████████████████████████████| 61kB 8.0MB/s 
     Saved ./idna-2.7-py2.py3-none-any.whl
   Collecting urllib3<1.24,>=1.21.1 (from requests)
     Downloading https://pypi.doubanio.com/packages/bd/c9/6fdd990019071a4a32a5e7cb78a1d92c53851ef4f56f62a3486e6a7d8ffb/urllib3-1.23-py2.py3-none-any.whl (133kB)
       100% |████████████████████████████████| 143kB 7.5MB/s 
     Saved ./urllib3-1.23-py2.py3-none-any.whl
   Collecting chardet<3.1.0,>=3.0.2 (from requests)
     Using cached https://pypi.doubanio.com/packages/bc/a9/01ffebfb562e4274b6487b4bb1ddec7ca55ec7510b22e4c51f14098443b8/chardet-3.0.4-py2.py3-none-any.whl
     Saved ./chardet-3.0.4-py2.py3-none-any.whl
   Collecting certifi>=2017.4.17 (from requests)
     Downloading https://pypi.doubanio.com/packages/7c/e6/92ad559b7192d846975fc916b65f667c7b8c3a32bea7372340bfe9a15fa5/certifi-2018.4.16-py2.py3-none-any.whl (150kB)
       100% |████████████████████████████████| 153kB 4.6MB/s 
     Saved ./certifi-2018.4.16-py2.py3-none-any.whl
   Successfully downloaded requests idna urllib3 chardet certifi
   

   仔细查看命令的结果，可以看到

   Saved ./requests-2.19.1-py2.py3-none-any.whl
   

   表示下载后的路径为 ./requests-2.19.1-py2.py3-none-any.whl

2. 计算已下载的 requests 的哈希值

   $ pip hash requests-2.19.1-py2.py3-none-any.whl 
   requests-2.19.1-py2.py3-none-any.whl:
   --hash=sha256:63b52e3c866428a224f97cab011de738c36aec0185aa91cfacd418b5d58911d1