TakeV/spacemacs
Archived
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
This repository has been archived on 2024-10-22. You can view files and clone it, but cannot push or open issues or pull requests.
spacemacs/layers/+lang/python/README.org
Ivan Yonchovski 59c4f1f283 Use dap mode layer for python debugging 
- I had to remove the "db" keybinding manually before setting the dap bindings.
  An alternative approach is to use a different binding for it.
2019-04-15 20:56:27 +02:00

432 lines
20 KiB
Org Mode
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

#+TITLE: Python layer
[[file:img/python.png]]
* Table of Contents :TOC_4_gh:noexport:
- [[#description][Description]]
- [[#features][Features:]]
- [[#install][Install]]
- [[#layer][Layer]]
- [[#choosing-a-backend][Choosing a backend]]
- [[#backends][Backends]]
- [[#anaconda][Anaconda]]
- [[#language-server-protocol][Language Server Protocol]]
- [[#additional-tools][Additional tools]]
- [[#syntax-checking][Syntax checking]]
- [[#test-runner][Test runner]]
- [[#automatic-buffer-formatting-on-save][Automatic buffer formatting on save]]
- [[#automatic-save-of-buffer-when-testing][Automatic save of buffer when testing]]
- [[#autoflake][autoflake]]
- [[#pylookup][pylookup]]
- [[#dap-mode-debuggeronly-for-lsp-backend][dap-mode debugger(only for lsp backend)]]
- [[#configuration][Configuration]]
- [[#fill-column][Fill column]]
- [[#sort-imports][Sort imports]]
- [[#management-of-python-versions-and-virtual-environments][Management of Python versions and virtual environments]]
- [[#manage-virtual-environments-with-pyvenv][Manage virtual environments with pyvenv]]
- [[#manage-multiple-python-versions-with-pyenv][Manage multiple Python versions with pyenv]]
- [[#automatic-activation-of-local-pyenv-version][Automatic activation of local pyenv version]]
- [[#key-bindings][Key bindings]]
- [[#inferior-repl-process][Inferior REPL process]]
- [[#running-python-script-in-shell][Running Python Script in shell]]
- [[#testing][Testing]]
- [[#refactoring][Refactoring]]
- [[#pip-package-management][Pip package management]]
- [[#live-coding][Live coding]]
- [[#other-python-commands][Other Python commands]]
- [[#debugger][Debugger]]
* Description
This layer adds support for the Python language.
** Features:
- Support for the following backends:
- [[https://github.com/proofit404/anaconda-mode][anaconda]] (default),
- [[https://github.com/emacs-lsp/lsp-python][Language Server Protocol]] (experimental),
- Auto-completion
- Code Navigation
- Documentation Lookup using [[https://github.com/proofit404/anaconda-mode][anaconda-mode]] and [[https://github.com/tsgates/pylookup][pylookup]]
- Test Runners using [[https://github.com/syl20bnr/nose.el][nose.el]] or [[https://github.com/ionrock/pytest-el][pytest]]
- Virtual Environment using [[https://github.com/jorgenschaefer/pyvenv][pyvenv]] and [[https://github.com/yyuu/pyenv][pyenv]]
- semantic mode is enabled
- PEP8 compliant formatting via [[https://github.com/google/yapf][YAPF]]
- PEP8 checks with [[https://pypi.python.org/pypi/flake8][flake8]] or [[https://pypi.python.org/pypi/pylint/1.6.4][pylint]]
- Suppression of unused import with [[https://github.com/myint/autoflake][autoflake]]
- Use the ~%~ key to jump between blocks with [[https://github.com/redguardtoo/evil-matchit][evil-matchit]]
- Sort imports with [[https://pypi.python.org/pypi/isort][isort]]
- Fix a missing import statement with [[https://github.com/anachronic/importmagic.el][importmagic]]
- Pip package manager with [[https://github.com/brotzeit/pippel][pippel]]
* Install
** Layer
To use this configuration layer, add it to your =~/.spacemacs=. You will need to
add =python= to the existing =dotspacemacs-configuration-layers= list in this
file.
** Choosing a backend
To choose a default backend set the layer variable =python-backend=:
#+BEGIN_SRC elisp
(python :variables python-backend 'anaconda)
#+END_SRC
Backend can be chosen on a per project basis using directory local variables
(files named =.dir-locals.el= at the root of a project), an example to use the
=lsp= backend:
#+BEGIN_SRC elisp
;;; Directory Local Variables
;;; For more information see (info "(emacs) Directory Variables")
((python-mode (python-backend . lsp)))
#+END_SRC
*Note:* you can easily add a directory local variable with ~SPC f v d~.
* Backends
** Anaconda
=anaconda-mode= tries to install the dependencies itself but sometimes
it does not work and you may encounter the following message when
opening a python buffer:
#+BEGIN_EXAMPLE
Blocking call to accept-process-output with quit inhibited!!
#+END_EXAMPLE
To fix this, install the =anaconda-mode= [[https://github.com/proofit404/anaconda-mode/wiki][anaconda-deps]] by hand:
#+BEGIN_SRC sh
pip install --upgrade "jedi>=0.9.0" "json-rpc>=1.8.1" "service_factory>=0.1.5"
#+END_SRC
If you encounter problems with Jedi 1.0 consider downgrading to 0.9.0. See [[https://github.com/davidhalter/jedi/issues/873][this
issue]] for details.
Source: [[https://github.com/proofit404/anaconda-mode#issues]]
If you are facing errors such as “Unable to run anaconda-mode server”, try
setting your =PYTHONPATH= as explained at
[[https://github.com/proofit404/anaconda-mode#pythonpath]]
** Language Server Protocol
You just have to install python language server package:
#+BEGIN_SRC sh
pip install python-language-server
#+END_SRC
Additionally you can install the following other packages:
#+BEGIN_SRC sh
# for import sorting
pip install pyls-isort
# for mypy checking (python 3.4+ is needed)
pip install pyls-mypy
#+END_SRC
If you’ve installed the language server and related packages as development
dependencies in a pipenv environment, you’ll want to set the ~python-pipenv-activate~
config variable to ~t~. This activates your pipenv before enabling the
lsp backend.
* Additional tools
** Syntax checking
Syntax checking uses =flake8= package:
#+BEGIN_SRC sh
pip install flake8
#+END_SRC
** Test runner
Both =nose= and =pytest= are supported. By default =nose= is used.
To choose your test runner set the layer variable =python-test-runner= to
either =nose= or =pytest=.
#+BEGIN_SRC emacs-lisp
(setq-default dotspacemacs-configuration-layers
'((python :variables python-test-runner 'pytest)))
#+END_SRC
If you need both then you can set =python-test-runner= to a list like this:
#+BEGIN_SRC emacs-lisp
(setq-default dotspacemacs-configuration-layers
'((python :variables python-test-runner '(pytest nose))))
#+END_SRC
This means that =pytest= is your primary test runner. To use the secondary test
runner you can call the test functions with a prefix argument e.g. ~SPC u SPC m
t t~ to run one test with =nose=.
To set project specific test runners you can set =python-test-runner= in a
directory local variable in your project root. ~SPC f v d~ in Spacemacs. See
[[https://www.gnu.org/software/emacs/manual/html_node/emacs/Directory-Variables.html][the official documentation]] for more information.
The root of the project is detected with a =.git= directory or a =setup.cfg= file.
** Automatic buffer formatting on save
To enable automatic buffer formatting on save with [[https://github.com/google/yapf][YAPF]] set the variable
=python-enable-yapf-format-on-save= to =t=.
#+BEGIN_SRC emacs-lisp
(setq-default dotspacemacs-configuration-layers '(
(python :variables python-enable-yapf-format-on-save t)))
#+END_SRC
** Automatic save of buffer when testing
By default a buffer is automatically saved before tests are executed upon it,
you can disable this feature by setting =python-save-before-test= to =nil=.
#+BEGIN_SRC emacs-lisp
(setq-default dotspacemacs-configuration-layers '(
(python :variables python-save-before-test nil)))
#+END_SRC
** autoflake
To be able to suppress unused imports easily, install [[https://github.com/myint/autoflake][autoflake]]:
#+BEGIN_SRC sh
pip install autoflake
#+END_SRC
** pylookup
To use =pylookup= on ~SPC m h H~, make sure you update the database first, using
~SPC SPC pylookup-update~.
** dap-mode debugger(only for lsp backend)
To use =dap-mode= for debugging do:
#+BEGIN_SRC bash
pip install "ptvsd>=4.2"
#+END_SRC
* Configuration
** Fill column
If you want to customize the fill column value, use something like this inside
the =user-init= function in your =.spacemacs=:
#+BEGIN_SRC elisp
(setq-default dotspacemacs-configuration-layers '(
(python :variables python-fill-column 99)))
#+END_SRC
** Sort imports
If you want imports to be automatically sorted when you save a file (using
[[https://pypi.python.org/pypi/isort][isort]]), set the =python-sort-imports-on-save= variable in the python layer
config section:
#+BEGIN_SRC elisp
(setq-default dotspacemacs-configuration-layers
'((python :variables python-sort-imports-on-save t)))
#+END_SRC
or as a directory-local variable (for per-project settings).
* Management of Python versions and virtual environments
** Manage virtual environments with pyvenv
A virtual environment provides isolation of your Python package versions. For a
general overview see [[http://docs.python-guide.org/en/latest/dev/virtualenvs/][this site]]. [[http://virtualenvwrapper.readthedocs.io/en/latest/index.html][Virtualenvwrapper]] which is also explained in the
previous link, is a program which manages your virtual environments in a central
location set by the =WORKON_HOME= environment variable.
Spacemacs integration of virtual environments and virtualenvwrapper is provided
by the [[https://github.com/jorgenschaefer/pyvenv][pyvenv]] package. It provides the following key bindings:
| Key binding | Description |
|-------------+-------------------------------------------------|
| ~SPC m V a~ | activate a virtual environment in any directory |
| ~SPC m V d~ | deactivate active virtual environment |
| ~SPC m V w~ | work on virtual environment in =WORKON_HOME= |
** Manage multiple Python versions with pyenv
If you need multiple Python versions (e.g. Python 2 and Python 3) then take a
look at [[https://github.com/yyuu/pyenv][pyenv]]. It enables the installation and managment of multiple
Python versions.
[[https://www.brianthicks.com/post/2015/04/15/automate-your-python-environment-with-pyenv/][This blogpost]] gives a good overview on how to use the tool. Spacemacs
integration is provided by [[https://github.com/proofit404/pyenv-mode][pyenv mode]] which has the following key bindings.
| Key binding | Description |
|-------------+--------------------------------------|
| ~SPC m v s~ | set a pyenv environment with [[https://github.com/pyenv/pyenv][pyenv]] |
| ~SPC m v u~ | unset a pyenv environment with [[https://github.com/pyenv/pyenv][pyenv]] |
Pyenv can also manage virtual environments for each of the Python versions it
has installed. Those will be listed alongside your Python versions.
*** Automatic activation of local pyenv version
A project-specific pyenv version may be written to a file called
=.python-version= using the [[https://github.com/yyuu/pyenv/blob/master/COMMANDS.md#user-content-pyenv-local][pyenv local]] command.
Spacemacs can search in parent directories for this file, and automatically set
the pyenv version. The behavior can be set with the variable
=python-auto-set-local-pyenv-version= to:
- =on-visit= (default) set the version when you visit a python buffer,
- =on-project-switch= set the version when you switch projects,
- =nil= to disable.
The same is also possible on pyvenv with a file called =.venv=. The behavior
can be set with the variable =python-auto-set-local-pyvenv-virtualenv== to:
- =on-visit= (default) set the virtualenv when you visit a python buffer,
- =on-project-switch= set the virtualenv when you switch projects,
- =nil= to disable.
* Key bindings
** Inferior REPL process
Start a Python or iPython inferior REPL process with ~SPC m s i~.
If =ipython= is available in system executable search paths, =ipython=
will be used to launch python shell; otherwise, default =python=
interpreter will be used. You may change your system executable
search path by activating a virtual environment.
Send code to inferior process commands:
| Key binding | Description |
|-------------+-------------------------------------------------|
| ~SPC m s b~ | send buffer and keep code buffer focused |
| ~SPC m s B~ | send buffer and switch to REPL in insert mode |
| ~SPC m s f~ | send function and keep code buffer focused |
| ~SPC m s F~ | send function and switch to REPL in insert mode |
| ~SPC m s i~ | start inferior REPL process |
| ~SPC m s r~ | send region and keep code buffer focused |
| ~SPC m s R~ | send region and switch to REPL in insert mode |
| ~CTRL+j~ | next item in REPL history |
| ~CTRL+k~ | previous item in REPL history |
** Running Python Script in shell
To run a Python script like you would in the shell press ~SPC m c c~
to start the Python script in comint mode. This is useful when working with
multiple Python files since the REPL does not reload changes made in other
modules.
| Key binding | Description |
|-------------+---------------------------------------------------------------------------|
| ~SPC m c c~ | Execute current file in a comint shell |
| ~SPC m c C~ | Execute current file in a comint shell and switch to it in =insert state= |
*Note:* With the universal argument ~SPC u~ you can enter a new
compilation command.
** Testing
Test commands start with ~m t~. To use the secondary test runner call the
function with a prefix argument, for example ~SPC u SPC m t a~.
| No Debug | Description |
|-------------+----------------------------------------------------------|
| ~SPC m t a~ | launch all tests of the project |
| ~SPC m t b~ | launch all tests of the current buffer (same as module) |
| ~SPC m t l~ | launch last tests |
| ~SPC m t m~ | launch all tests of the current module |
| ~SPC m t s~ | launch all tests of the current suite (only with =nose=) |
| ~SPC m t t~ | launch the current test (function) |
| Debug | Description |
|-------------+------------------------------------------------------------------------|
| ~SPC m t A~ | launch all tests of the project in debug mode |
| ~SPC m t B~ | launch all tests of the current buffer (module) in debug mode |
| ~SPC m t M~ | launch all tests of the current module in debug mode |
| ~SPC m t S~ | launch all tests of the current suite in debug mode (only with =nose=) |
| ~SPC m t T~ | launch the current test (function) in debug mode |
** Refactoring
| Key binding | Description |
|-------------+-------------------------------------------------|
| ~SPC m r f~ | fix a missing import statement with [[https://pypi.python.org/pypi/importmagic][importmagic]] |
| ~SPC m r i~ | remove unused imports with [[https://github.com/myint/autoflake][autoflake]] |
| ~SPC m r I~ | sort imports with [[https://pypi.python.org/pypi/isort][isort]] |
** Pip package management
In python buffer type ~SPC m P~ to open buffer listing all installed =pip=
packages in the currently activated virtual environment.
*Note:* To open this menu from outside a python buffer type
~SPC SPC pippel-list-packages RET~.
In the package list buffer:
| Key binding | Description |
|-------------+-------------------------------------------------------------|
| ~RET~ | follow link (=pippel-menu-visit-homepage=) |
| ~d~ | mark for deletion (=pippel-menu-mark-delete=) |
| ~i~ | prompt user for packages (=pippel-install-package=) |
| ~m~ | remove mark (=pippel-menu-mark-unmark=) |
| ~r~ | refresh package list (=pippel-list-packages=) |
| ~U~ | mark all upgradable (=pippel-menu-mark-all-upgrades=) |
| ~u~ | mark for upgrade (=pippel-menu-mark-upgrade=) |
| ~x~ | perform marked package menu actions (=pippel-menu-execute=) |
** Live coding
Live coding is provided by the [[https://github.com/donkirkby/live-py-plugin][live-py-plugin.]]
| Key binding | Description |
|-------------+---------------------|
| ~SPC m l~ | Toggle live-py-mode |
** Other Python commands
| Key binding | Description |
|---------------+-----------------------------------------------------------------------------------|
| ~SPC m =~ | Reformat the buffer according to PEP8 using [[https://github.com/google/yapf][YAPF]] |
| ~SPC m d b~ | toggle a breakpoint using =wdb=, =ipdb=, =pudb=, =pdb= or =python3.7= (and above) |
| ~SPC m g a~ | go to assignment using =anaconda-mode-find-assignments= (~C-o~ to jump back) |
| ~SPC m g b~ | jump back |
| ~SPC m g g~ | go to definition using =anaconda-mode-find-definitions= (~C-o~ to jump back) |
| ~SPC m g u~ | navigate between usages with =anaconda-mode-find-references= |
| ~SPC m h d~ | look for documentation using =helm-pydoc= |
| ~SPC m h h~ | quick documentation using anaconda |
| ~SPC m h H~ | open documentation in =firefox= using [[https://github.com/tsgates/pylookup][pylookup]] |
| ~SPC m v a~ | activate a virtual environment in any directory |
| ~SPC m v d~ | deactivate active virtual environment |
| ~SPC m v s~ | set a pyenv environment with [[https://github.com/pyenv/pyenv][pyenv]] |
| ~SPC m v u~ | unset a pyenv environment with [[https://github.com/pyenv/pyenv][pyenv]] |
| ~SPC m v w~ | work on virtual environment in =WORKON_HOME= |
| ~SPC m v p a~ | activate pipenv in current project |
| ~SPC m v p d~ | deactivate pipenv in current project |
| ~SPC m v p i~ | install module into pipenv environment |
| ~SPC m v p o~ | open pipenv module in buffer |
| ~SPC m v p s~ | launch pipenv shell in current project |
| ~SPC m v p u~ | uninstall module from pipenv environment |
** Debugger
| Key binding | Description |
|---------------+---------------------------------|
| ~SPC m d d d~ | start debugging |
| ~SPC m d d l~ | debug last configuration |
| ~SPC m d d r~ | debug recent configuration |
|---------------+---------------------------------|
| ~SPC m d c~ | continue |
| ~SPC m d i~ | step in |
| ~SPC m d o~ | step out |
| ~SPC m d s~ | next step |
| ~SPC m d v~ | inspect value at point |
| ~SPC m d r~ | restart frame |
|---------------+---------------------------------|
| ~SPC m d .~ | debug transient state |
|---------------+---------------------------------|
| ~SPC m d a~ | abandon current session |
| ~SPC m d A~ | abandon all process |
|---------------+---------------------------------|
| ~SPC m d e e~ | eval |
| ~SPC m d e r~ | eval region |
| ~SPC m d e t~ | eval value at point |
|---------------+---------------------------------|
| ~SPC m d S s~ | switch session |
| ~SPC m d S t~ | switch thread |
| ~SPC m d S f~ | switch frame |
|---------------+---------------------------------|
| ~SPC m d I i~ | inspect |
| ~SPC m d I r~ | inspect region |
| ~SPC m d I t~ | inspect value at point |
|---------------+---------------------------------|
| ~SPC m d b b~ | toggle a breakpoint |
| ~SPC m d b c~ | change breakpoint condition |
| ~SPC m d b l~ | change breakpoint log condition |
| ~SPC m d b h~ | change breakpoint hit count |
| ~SPC m d b a~ | add a breakpoint |
| ~SPC m d b d~ | delete a breakpoint |
| ~SPC m d b D~ | clear all breakpoints |
|---------------+---------------------------------|
| ~SPC m d '_~ | Run debug REPL |
|---------------+---------------------------------|
| ~SPC m d w l~ | list local variables |
| ~SPC m d w o~ | goto output buffer if present |
| ~SPC m d w s~ | list sessions |
| ~SPC m d w b~ | list breakpoints |
Reference in a new issue View git blame Copy permalink