Python项目生成所有依赖包的清单

最近写完的自动化脚本，分享给同事的时候发现依赖包很难解决（使用的不是virtualenv环境）。想起来之前看开源接口平台项目的时候可以一键下载依赖包，于是就找到了第三方包pipreqs，可以自动帮助我们自动生成requirements.txt

• github原文介绍：pipreqs-根据任何项目的导入生成pip requirements.txt文件
• 链接:https://github.com/bndr/pipreqs

第一步：下载pipreqs工具包（pip install pipreqs）

Microsoft Windows [版本 10.0.17134.1069]
(c) 2018 Microsoft Corporation。保留所有权利。

C:\Users\wy.DESKTOP-KENPKKP\Desktop\Dingda\dingAPI>pip install pipreqs
Collecting pipreqs
  Downloading https://files.pythonhosted.org/packages/f8/8d/2e7c15bc5fcab54f9c5b404b5668fdac65f5e3224b2116097fae1299fc98/pipreqs
-0.4.9-py2.py3-none-any.whl
Collecting docopt
  Downloading https://files.pythonhosted.org/packages/a2/55/8f8cab2afd404cf578136ef2cc5dfb50baa1761b68c9da1fb1e4eed343c9/docopt-
0.6.2.tar.gz
Collecting yarg
  Downloading https://files.pythonhosted.org/packages/8b/90/89a2ff242ccab6a24fbab18dbbabc67c51a6f0ed01f9a0f41689dc177419/yarg-0.
1.9-py2.py3-none-any.whl
Installing collected packages: docopt, yarg, pipreqs
    Running setup.py install for docopt ... done
Successfully installed docopt-0.6.2 pipreqs-0.4.9 yarg-0.1.9

第二步：切换到项目路径下，生成依赖包的txt文档（pipreqs ./ --encoding=utf8）

期间遇到报错：编码错误（UnicodeDecodeError: 'gbk' codec can't decode byte 0x95 in position 40）

C:\Users\wy.DESKTOP-KENPKKP\Desktop\Dingda\dingAPI>pipreqs ./
Traceback (most recent call last):
  File "c:\users\wy.desktop-kenpkkp\appdata\local\programs\python\python36\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
    ......
    extra_ignore_dirs=extra_ignore_dirs)
  File "c:\users\wy.desktop-kenpkkp\appdata\local\programs\python\python36\lib\site-packages\pipreqs\pipreqs.py", line 75, in ge
t_all_imports
    contents = f.read()
UnicodeDecodeError: 'gbk' codec can't decode byte 0x95 in position 40: illegal multibyte sequence

找到原因是因为在Windows下需要制定编码方式为：uft-8，操作如下

C:\Users\wy.DESKTOP-KENPKKP\Desktop\Dingda\dingAPI>pipreqs ./ --encoding=utf8
INFO: Successfully saved requirements file in ./requirements.txt

第三步：查看需要的依赖包（type requirements.txt）

C:\Users\wy.DESKTOP-KENPKKP\Desktop\Dingda\dingAPI>type  requirements.txt
requests==2.18.4
xlutils==2.0.0
xmltodict==0.12.0
xlrd==1.2.0
dicttoxml==1.7.4

下载依赖包方法（pip install -r requriements.txt）

C:\Users\wy.DESKTOP-KENPKKP\Desktop\Dingda\dingAPI>pip install -r  requirements.txt
Requirement already satisfied: requests==2.18.4 in c:\users\wy.desktop-kenpkkp\appdata\local\programs\python\python36\lib\site-p
ackages (from -r requirements.txt (line 1)) (2.18.4)
Requirement already satisfied: xlutils==2.0.0 in c:\users\wy.desktop-kenpkkp\appdata\local\programs\python\python36\lib\site-pac
kages (from -r requirements.txt (line 2)) (2.0.0)
Requirement already satisfied: xmltodict==0.12.0 in c:\users\wy.desktop-kenpkkp\appdata\local\programs\python\python36\lib\site-
packages (from -r requirements.txt (line 3)) (0.12.0)
Requirement already satisfied: xlrd==1.2.0 in 

附带pipreqs详细用法

gitbug地址：https://github.com/bndr/pipreqs

• 用法：

• pipreqs [选项] <路径>
  

• 选项：
• use-local仅使用本地软件包信息，而不是查询PyPI
• pypi-server <URL>使用自定义PyPi服务器
• proxy <url>使用代理，参数将传递到请求库。您也可以只设置终端中的environment参数：
  • $ export HTTP_PROXY =“ http://10.10.1.10:3128”
  • $ export HTTPS_PROXY =“ https://10.10.1.10:1080”
  • debug打印调试信息
• ignore <目录> ...忽略多余的目录
• encoding <charset>使用encoding参数打开文件
• savepath <文件>将需求列表保存在给定文件中
• print在标准输出中输出需求列表
• force覆盖现有的requirements.txt
• clean <文件>通过删除项目中未导入的模块来清理requirements.txt。