c893383fe4
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183 lines
8.5 KiB
Org Mode
183 lines
8.5 KiB
Org Mode
#+TITLE: Python layer
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#+HTML_HEAD_EXTRA: <link rel="stylesheet" type="text/css" href="../../../css/readtheorg.css" />
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[[file:img/python.png]]
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* Table of Contents :TOC_4_org:noexport:
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- [[Description][Description]]
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- [[Features:][Features:]]
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- [[Install][Install]]
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- [[Layer][Layer]]
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- [[Test runner][Test runner]]
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- [[Anaconda dependencies][Anaconda dependencies]]
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- [[Automatic buffer formatting on save][Automatic buffer formatting on save]]
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- [[autoflake][autoflake]]
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- [[pylookup][pylookup]]
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- [[Key Bindings][Key Bindings]]
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- [[Inferior REPL process][Inferior REPL process]]
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- [[Running Python Script in shell][Running Python Script in shell]]
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- [[Testing][Testing]]
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- [[Refactoring][Refactoring]]
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- [[Other Python commands][Other Python commands]]
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- [[Configuration][Configuration]]
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- [[Fill column][Fill column]]
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* Description
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This layer adds support for the Python language.
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** Features:
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- Auto-completion using [[https://github.com/proofit404/anaconda-mode][anaconda-mode]]
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- Code Navigation using [[https://github.com/proofit404/anaconda-mode][anaconda-mode]]
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- Documentation Lookup using [[https://github.com/proofit404/anaconda-mode][anaconda-mode]] and [[https://github.com/tsgates/pylookup][pylookup]]
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- Test Runners using [[https://github.com/syl20bnr/nose.el][nose.el]] or [[https://github.com/ionrock/pytest-el][pytest]]
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- Virtual Environment using [[https://github.com/jorgenschaefer/pyvenv][pyvenv]] and [[https://github.com/yyuu/pyenv][pyenv]]
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- semantic mode is enabled
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- PEP8 compliant formatting via [[https://github.com/google/yapf][YAPF]]
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- Suppression of unused import with [[https://github.com/myint/autoflake][autoflake]]
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- Use the ~%~ key to jump between blocks with [[https://github.com/redguardtoo/evil-matchit][evil-matchit]]
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* Install
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** Layer
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To use this contribution add it to your =~/.spacemacs=
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#+BEGIN_SRC emacs-lisp
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(setq-default dotspacemacs-configuration-layers '(python))
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#+END_SRC
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** Test runner
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Both =nose= and =pytest= are supported. By default =nose= is used.
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To choose your test runner set the layer variable =python-test-runner= to
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either =nose= or =pytest=.
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The root of the project is detected with a =.git= directory or a =setup.cfg= file.
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#+BEGIN_SRC emacs-lisp
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(setq-default dotspacemacs-configuration-layers
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'((python :variables python-test-runner 'pytest)))
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#+END_SRC
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** Anaconda dependencies
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=anaconda-mode= tries to install the dependencies itself but sometimes
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it does not work and you may encounter the following message when
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opening a python buffer:
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#+begin_example
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Blocking call to accept-process-output with quit inhibited!!
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#+end_example
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To fix this, install the =anaconda-mode= [[https://github.com/proofit404/anaconda-mode/blob/master/requirements.txt][anaconda-deps]] by hand:
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#+begin_src sh
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pip install jedi==0.8.1 json-rpc==1.8.1 service_factory==0.1.2
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#+end_src
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Source: https://github.com/proofit404/anaconda-mode#issues
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If you are facing errors such as "Unable to run anaconda-mode server", try
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setting your ~PYTHONPATH~ as explained at
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https://github.com/proofit404/anaconda-mode#pythonpath
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** Automatic buffer formatting on save
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To enable automatic buffer formatting on save with [[https://github.com/google/yapf][YAPF]] set the variable
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=python-enable-yapf-format-on-save= to =t=.
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#+BEGIN_SRC emacs-lisp
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(setq-default dotspacemacs-configuration-layers '(
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(python :variables python-enable-yapf-format-on-save t)))
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#+END_SRC
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** autoflake
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To be able to suppress unused imports easily, install [[https://github.com/myint/autoflake][autoflake]]:
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#+BEGIN_SRC sh
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pip install autoflake
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#+END_SRC
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** pylookup
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To use =pylookup= on ~SPC m h H~, make sure you update the database first, using
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~SPC : pylookup-update~.
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* Key Bindings
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** Inferior REPL process
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Start a Python or iPython inferior REPL process with ~SPC m s i~.
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If =ipython= is available in system executable search paths, =ipython=
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will be used to launch python shell; otherwise, default =python=
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interpreter will be used. You may change your system executable
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search path by activating a virtual environment.
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Send code to inferior process commands:
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| Key Binding | Description |
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|-------------+-------------------------------------------------|
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| ~SPC m s b~ | send buffer and keep code buffer focused |
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| ~SPC m s B~ | send buffer and switch to REPL in insert mode |
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| ~SPC m s f~ | send function and keep code buffer focused |
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| ~SPC m s F~ | send function and switch to REPL in insert mode |
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| ~SPC m s i~ | start inferior REPL process |
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| ~SPC m s r~ | send region and keep code buffer focused |
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| ~SPC m s R~ | send region and switch to REPL in insert mode |
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| ~CTRL+j~ | next item in REPL history |
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| ~CTRL+k~ | previous item in REPL history |
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** Running Python Script in shell
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To run a Python script like you would in the shell press ~SPC m c c~
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to start the Python script in comint mode. This is useful when working with
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multiple Python files since the REPL does not reload changes made in other
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modules.
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| Key Binding | Description |
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|-------------+---------------------------------------------------------------------------|
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| ~SPC m c c~ | Execute current file in a comint shell |
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| ~SPC m c C~ | Execute current file in a comint shell and switch to it in =insert state= |
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*Note:* With the universal argument ~SPC u~ you can enter a new
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compilation command.
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** Testing
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Test commands start with ~m t~:
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| No Debug | Description |
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|-------------+----------------------------------------------------------|
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| ~SPC m t a~ | launch all tests of the project |
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| ~SPC m t b~ | launch all tests of the current buffer (same as module) |
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| ~SPC m t m~ | launch all tests of the current module |
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| ~SPC m t s~ | launch all tests of the current suite (only with =nose=) |
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| ~SPC m t t~ | launch the current test (function) |
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| Debug | Description |
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|-------------+------------------------------------------------------------------------|
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| ~SPC m t A~ | launch all tests of the project in debug mode |
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| ~SPC m t B~ | launch all tests of the current buffer (module) in debug mode |
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| ~SPC m t M~ | launch all tests of the current module in debug mode |
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| ~SPC m t S~ | launch all tests of the current suite in debug mode (only with =nose=) |
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| ~SPC m t T~ | launch the current test (function) in debug mode |
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** Refactoring
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| Key Binding | Description |
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|-------------+--------------------------------------|
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| ~SPC m r i~ | remove unused imports with [[https://github.com/myint/autoflake][autoflake]] |
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** Other Python commands
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| Key Binding | Description |
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|-------------+------------------------------------------------------------------------------|
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| ~SPC m =~ | Reformat the buffer according to PEP8 using [[https://github.com/google/yapf][YAPF]] |
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| ~SPC m d b~ | toggle a breakpoint |
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| ~SPC m g g~ | go to definition using =anaconda-mode-find-definitions= (~C-o~ to jump back) |
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| ~SPC m g a~ | go to assignment using =anaconda-mode-find-assignments= (~C-o~ to jump back) |
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| ~SPC m g u~ | navigate between usages with =anaconda-mode-find-references= |
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| ~SPC m h d~ | look for documentation using =helm-pydoc= |
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| ~SPC m h h~ | quick documentation using anaconda |
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| ~SPC m h H~ | open documentation in =firefox= using [[https://github.com/tsgates/pylookup][pylookup]] |
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| ~SPC m v s~ | activate a virtual environment with [[https://github.com/yyuu/pyenv][pyenv]] |
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| ~SPC m v u~ | deactivate a virtual environment with [[https://github.com/yyuu/pyenv][pyenv]] |
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| ~SPC m V~ | activate a virtual environment with [[https://github.com/jorgenschaefer/pyvenv][pyvenv]] |
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* Configuration
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** Fill column
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If you want to customize the fill column value, use something like this inside the ~user-init~ function in your ~.spacemacs~:
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#+BEGIN_SRC elisp
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(setq python-fill-column 99)
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#+END_SRC
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