点冻结-本地 [英] Pip freeze --local

问题描述

我正在观看视频教程，而那个家伙是这样做的:

I am following a video tutorial and that guy did this:

$ pip freeze --local > requirement.txt
$ cat requirement.txt

这是将所有这些软件包及其版本导出到另一个项目中，但是如何:

this is to export all these packages with their versions in another project, but how:

• 什么是点冻结?和
• 那是什么 requirement.txt ?我们应该将所有这些软件包导出到txt文件中，.txt文件如何做到这一点呢?

• 第二行中的 cat 一词是什么?我的机器无法理解其中任何一个，但是我的机器说，它们在他的计算机上正在工作:

• what is pip freeze? and
• what is that requirement.txt? are we supposed to export all those packages in a txt file, how can .txt file do that does it grab their name?

• what is the word cat in second line? my machine can't understand either of those, but in his computer they were working, my machine says:

如您所见， cat 无法识别.

然后我在virtualenv目录中搜索require.txt，然后找到了

Then I look in virtualenv directory to search for requirement.txt and I find this

是的， requirement.txt 是零字节，其中没有任何内容.有什么问题吗?

Yes, requirement.txt is zero bytes, nothing in it. What is the problem?

接下来，我搜索了什么是 pip Frozen 和什么是 cat ?我找不到关于cat的简单定义.但这是 pip冻结

Next I googled for what is pip freeze and what is cat? I couldn't find a simple definition for cat. but here is pip freeze

用法:点子冻结[选项]说明将安装的软件包输出到需求格式.

Usage : pip freeze [options] Description Output installed packages in requirements format.

软件包以不区分大小写的排序顺序列出.

packages are listed in a case-insensitive sorted order.

什么是需求格式"?那是文本文件吗?

What is "requirements format"? Is that a text file?

然后我在堆栈溢出中遇到了这个问题:如何冻结仅在虚拟环境中安装的软件包?

Then I came to this question in Stack Overflow: How to freeze packages installed only in the virtual environment?

他是说我该如何在虚拟环境中用冰层保存包裹?

Does he means how do I preserve packages with a layer of ice in my virtual environment?

推荐答案

Pip是Python模块的软件包管理器.命令 pip Frozen 输出所有已安装的模块(包括版本号).-local 标志可防止Pip在虚拟环境中打印全局安装的软件包.

Pip is a package manger for Python modules. The command pip freeze outputs all installed modules (including version numbers). The --local flag prevents Pip from printing globally installed packages in a virtual environment.

通常，Python程序依赖于其他模块.您可以将这些必需的模块放在一个文本文件中(按惯例是 requirements.txt )，以便其他人可以通过运行 pip install -r要求来安装这些依赖项.txt .您可以使用 pip冻结方便地创建此类文件.

Usually, a Python program depends on other modules. You can put those required modules in a text file (requirements.txt by convention) so that other people can install those dependencies by running pip install -r requirements.txt. You can conveniently create such a file using pip freeze.

在Linux机器上， cat 用于输出文件的内容.您可以在Windows上使用 type .

On a Linux machine, cat is used to output the contents of a file. You can use type on Windows.

需求格式如下:

docutils==0.11
Jinja2==2.7.2
MarkupSafe==0.19
Pygments==1.6
Sphinx==1.2.2

每行包含一个python模块名称和一个相应的版本.

Each lines consist of a python module name and a corresponding version.

https://pip.pypa.io/en/stable/reference/pip_freeze/
https://pip.readthedocs.io/en/1.1/requirements.html

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