如何在 Pocket Option 中交易数字期权
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Python 之 pip安装 及 使用详解
ZC·Shou 于 2018-12-14 13:59:34 发布 208304 收藏 452
pip 是啥
pip 是 Python 的包安装程序。其实，pip 就是 Python 标准库（The Python Standard Library）中的一个包，只是这个包比较特殊，用它可以来管理 Python 标准库（The Python Standard Library）中其他的包。pip 支持从 PyPI，版本控制，本地项目以及直接从分发文件进行安装。pip 是一个命令行程序。 安装 pip 后，会向系统添加一个 pip 命令，该命令可以从命令提示符运行。
目前，pip 是 The Python Packaging Authority (PyPA) 推荐的 Python 包管理工具！英文比较好的同学可以直接去官网参看其用户手册
PyPI（The Python Package Index，Python包索引）是 Python 编程语言的软件存储库。通常，我们就是从这上面安装各种 Python 的包，也可以在上面发布自己的包。
The Python Packaging Authority (PyPA) is a working group that maintains many 如何在 Pocket Option 中交易数字期权 of the relevant projects in Python packaging.
从 Python 2 版本 >=2.7.9 或 Python 3 版本 >=3.如何在 Pocket Option 中交易数字期权 4 开始，官网的安装包中已经自带了 pip，在安装时用户可以直接选择安装。或者如果使用由 virtualenv 或者 pyvenv 创建的 Virtual Environment，那么 pip 也是被默认安装的。
如果没有在安装的时候，选择上安装pip，那么也可以从本地安装。例如，直接使用 get-pip.py 进行安装。首先从官网下载 get-pip.py ，然后直接运行 python get-pip.如何在 Pocket Option 中交易数字期权 如何在 Pocket Option 中交易数字期权 py 即可。
安装后，在命令行中键入： pip + 回车，就会出现如下使用说明：
install
命令行直接键入 pip install + 回车，则 如何在 Pocket Option 中交易数字期权 出现如下提示： ERROR: You must give at least one requirement to install (see "pip help install") 。接着我们键入 pip help install ,就会出现 pip install 的使用说明了，如下：
上面一大堆，总结来说，安装命令就是： pip install 或 pip install -r requirements.txt （对于本地安装包可以指定路径）。唯一需要特殊说明的是，安装时可以指定版本号来安装，举例如下：
uninstall
卸载安装包命令： pip uninstall 或 pip uninstall -r requirements.txt
pip install -U 或：pip install --upgrade
freeze
pip freeze 查看已经安装的包及版本信息。导出到指定文件中。例如， pip freeze > requirements.txt ，文件名称随意；也可以使用 pip install -r requirements.txt ，两者等效。
列出当前已经安装的包。使用命令 pip 如何在 Pocket Option 中交易数字期权 list -o 则可查询可升级的包。
显示包所在目录及信息，格式为： pip show 。如果不加包名，则提示 ERROR: Please provide a package name or names. 。
search
搜索包，格式为： pip search 。如果不写关键字，则提示 ERROR: Missing required argument (search query). 。
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