python速查

2019独角兽企业重金招聘Python工程师标准>>>

虚拟环境

$ python3 -m venv .venv
$ pip --version
$ source .venv/bin/activate
$ pip install --upgrade pip
$ deactivate

删除

(.venv) $ deactivate
$ rm -rf .venv

帮助

$ python3 -m venv -h
usage: venv [-h] [--system-site-packages] [--symlinks | --copies] [--clear]
            [--upgrade] [--without-pip] [--prompt PROMPT]
            ENV_DIR [ENV_DIR ...]

Creates virtual Python environments in one or more target directories.

positional arguments:
  ENV_DIR               A directory to create the environment in.

optional arguments:
  -h, --help            show this help message and exit
  --system-site-packages
                        Give the virtual environment access to the system
                        site-packages dir.
  --symlinks            Try to use symlinks rather than copies, when symlinks
                        are not the default for the platform.
  --copies              Try to use copies rather than symlinks, even when
                        symlinks are the default for the platform.
  --clear               Delete the contents of the environment directory if it
                        already exists, before environment creation.
  --upgrade             Upgrade the environment directory to use this version
                        of Python, assuming Python has been upgraded in-place.
  --without-pip         Skips installing or upgrading pip in the virtual
                        environment (pip is bootstrapped by default)
  --prompt PROMPT       Provides an alternative prompt prefix for this
                        environment.

Once an environment has been created, you may wish to activate it, e.g. by
sourcing an activate script in its bin directory.

频繁切换也可以考虑 virtualenvwrapper库。

$ pip install virtualenvwrapper
# .bashrc or .bash_profile
export WORKON_HOME=~/.virtualenvs
source /usr/local/bin/virtualenvwrapper.sh
$ mkvirtualenv automation_cookbook
$ deactivate
$ workon automation_cookbook
(automation_cookbook) $

更多参考 https://virtualenvwrapper.readthedocs.io/en/latest/index.html

安装库

建立requirements.txt：

delorean==1.0.0
requests==2.18.4

安装

$ pip install -r requirements.txt
...
Successfully installed babel-2.5.3 certifi-2018.4.16 chardet-3.0.4 delorean-1.0.0

查看已经安装模块：

pip freeze > requirements.txt

更多库参考：

https://github.com/china-testing/python-api-tesing

转载于:https://my.oschina.net/u/1433482/blog/2246057