python项目依赖库生成requirements.txt文件

第一种：pip freeze > requirements.txt
第二种：pipreqs 项目根目录（不能有中文）--encoding=utf8
                
requirements已存在：    pipreqs 项目根目录 --encoding=utf8 --force

第一种：pip freeze > requirements.txt

步骤：

1. cd 到你的项目根目录

2. 执行：pip freeze > requirements.txt

   C:\Users\dyunren>i:
   
   I:\>cd I:\python20\softwaredate\py_basics
   

---

缺点：`你本机python环境所有依赖都会写到 requirements.txt文件当中。

如图展示：

image.png

第二种：pipreqs

pipreqs的安装：

pip install pipreqs

查看版本：

pip show pipreqs  或 pipreqs --version

image.png

使用：pipreqs python项目根目录

C:\Users\dyunren>i:

I:\>cd I:\python20\softwaredate\py_basics

I:\python20\softwaredate\py_basics>pipreqs
Traceback (most recent call last):
  File "d:\software\python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "d:\software\python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:\software\python37\Scripts\pipreqs.exe\__main__.py", line 9, in <modul
e>
  File "d:\software\python37\lib\site-packages\pipreqs\pipreqs.py", line 470, in
 main
    init(args)
  File "d:\software\python37\lib\site-packages\pipreqs\pipreqs.py", line 409, in
 init
    follow_links=follow_links)
  File "d:\software\python37\lib\site-packages\pipreqs\pipreqs.py", line 122, in
 get_all_imports
    contents = f.read()
UnicodeDecodeError: 'gbk' codec can't decode byte 0xaf in position 207: illegal
multibyte sequence

• 如上图出现了编码出错'gbk',需要转换成utf-8

pipreqs I:\python20\softwaredate\py_basics --encoding=utf8

ERROR: Failed on file: I:\python20\softwaredate\py_basics\列表操作\列表序列通用
操作.py
Traceback (most recent call last):
  File "d:\software\python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "d:\software\python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:\software\python37\Scripts\pipreqs.exe\__main__.py", line 9, in <modul
e>
  File "d:\software\python37\lib\site-packages\pipreqs\pipreqs.py", line 470, in
 main
    init(args)
  File "d:\software\python37\lib\site-packages\pipreqs\pipreqs.py", line 409, in
 init
    follow_links=follow_links)
  File "d:\software\python37\lib\site-packages\pipreqs\pipreqs.py", line 138, in
 get_all_imports
    raise exc
  File "d:\software\python37\lib\site-packages\pipreqs\pipreqs.py", line 124, in
 get_all_imports
    tree = ast.parse(contents)
  File "d:\software\python37\lib\ast.py", line 35, in parse
    return compile(source, filename, mode, PyCF_ONLY_AST)
  File "<unknown>", line 1
    # -*- coding: utf-8 -*-
    ^
SyntaxError: invalid character in identifier

报错为标识符错误，是因为我文件名有带中文了。真的是坑啊，只好换个项目试一下了。

• pipreqs D:\softwaredate\TestAPI --encoding=utf8

image.png

如果报requirements.tx存在的警告信息：

• 可以使用--force 参数来覆盖

C:\Users\dyunren>pipreqs D:\softwaredate\TestAPI --encoding=utf8
WARNING: Requirements.txt already exists, use --force to overwrite it

pipreqs D:\softwaredate\TestAPI --encoding=utf8 --force

image.png

requirements.txt中的依赖如何安装：

pip install -r requirements.txt