Tips and tricks for python development.
For managing python installs I use pyenv and pyenv-virtualenv.
pyenv Allows you to easily install and manage different versions of python (e.g. 2.7 and 3.6). Further you can set specific versions of python to run within specific directories, or set a default global version.
pyenv-virtualenv allows you to create 'virtualenvs', or isolated python environments. This is useful if - say - you have two projects that both require the same library but one is unable to work with a newer version of that library.
As a general rule - I create a virtualenv for every new project.
After I have installed packages for a project I run:
pip freeze > requirements.txt
This creates a file that looks like this:
alabaster==0.7.10
aniso8601==1.3.0
appnope==0.1.0
argcomplete==1.9.3
arrow==0.12.0
asn1crypto==0.23.0
Each line is a python package with an == and the exact version that was installed. If you send your project to someone else all they need to do is run:
pip install -r requirements.txt
Within a virtualenv, and all the packages will be installed using the versions listed in the requirements.txt file.
Sublime Text is my favorite text editor.
- Package UI - A visual way of examining what Python packages you have installed.
- SendCode - Send code to the terminal (iterm2)
In order for Sublime-Text to run the pyenv-specified version or virtualenv of python you are using you have to use a custom build system. Go to Tools → Build System → New Build System..._ to create a new build system.
The text below can be used to create a pyenv build system.
{
"cmd": ["/usr/local/var/pyenv/shims/python", "-u", "$file"],
"file_regex": "^[ ]*File \"(...*?)\", line ([0-9]*)",
"selector": "source.python"
}