Add some more tools for fixing problems with Python files

autoload/ale/fix/registry.vim

@@ -2,10 +2,30 @@
 " Description: A registry of functions for fixing things.
 
 let s:default_registry = {
+\   'autopep8': {
+\       'function': 'ale#handlers#python#AutoPEP8',
+\       'suggested_filetypes': ['python'],
+\       'description': 'Fix PEP8 issues with autopep8.',
+\   },
 \   'eslint': {
 \       'function': 'ale#handlers#eslint#Fix',
 \       'suggested_filetypes': ['javascript'],
-\       'description': '',
+\       'description': 'Apply eslint --fix to a file.',
+\   },
+\   'isort': {
+\       'function': 'ale#handlers#python#ISort',
+\       'suggested_filetypes': ['python'],
+\       'description': 'Sort Python imports with isort.',
+\   },
+\   'remove_trailing_lines': {
+\       'function': 'ale#fix#generic#RemoveTrailingBlankLines',
+\       'suggested_filetypes': [],
+\       'description': 'Remove all blank lines at the end of a file.',
+\   },
+\   'yapf': {
+\       'function': 'ale#handlers#python#YAPF',
+\       'suggested_filetypes': ['python'],
+\       'description': 'Fix Python files with yapf.',
 \   },
 \}
 

autoload/ale/handlers/python.vim

@@ -41,3 +41,25 @@ function! ale#handlers#python#AutoPEP8(buffer, lines) abort
     \   'command': 'autopep8 -'
     \}
 endfunction
+
+function! ale#handlers#python#ISort(buffer, lines) abort
+    let l:config = ale#path#FindNearestFile(a:buffer, '.isort.cfg')
+    let l:config_options = !empty(l:config)
+    \   ? ' --settings-path ' . ale#Escape(l:config)
+    \   : ''
+
+    return {
+    \   'command': 'isort' . l:config_options . ' -',
+    \}
+endfunction
+
+function! ale#handlers#python#YAPF(buffer, lines) abort
+    let l:config = ale#path#FindNearestFile(a:buffer, '.style.yapf')
+    let l:config_options = !empty(l:config)
+    \   ? ' --style ' . ale#Escape(l:config)
+    \   : ''
+
+    return {
+    \   'command': 'yapf --no-local-style' . l:config_options,
+    \}
+endfunction