my ALE linter is not working for python - shows only style errors

Question

I have an ALE configuration for both shell & python. The shell lint seems to work, but the python only style issues, e.g.

for this dummy file:

  import ..foo      # bad import                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                           
>>def a(a,b,c):                                                                                                                                                                                                                                                            
>>    print(d)A     #  << using unknown parameter                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                           
>>def a(a, b. c):   #  << "." instead of ","                                                                                                                                                                                                                               
>>    pass          #  << not using the parameters                                                                                                                                                                                                                         
                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                           
>>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  

I only get the following errors:

1. Line too long
2. inline comment should start with '# '
3. missing whitespace

but what about the blatant errors this file has? (which I commented myself)

This is my .vimrc

" Plugins                                                                                                                                                                                                                                                                  
call plug#begin('~/.vim/plugged')     
" linter                                                                                                                                                                                                                                                                   
Plug 'dense-analysis/ale'
call plug#end()                                                                                                                                                                                                                                                            
" Plugins end  

" ALE config                                                                                                                                                                                                                                                               
let g:ale_linters = {                                                                                                                                                                                                                                                      
        \   'python': ['flake8', 'pylint', 'bandit', 'mypy', 'pycodestyle'],                                                                                                                                                                                               
        \   'shell': ['shellcheck'],                                                                                                                                                                                                                                       
        \} 

I'm using

• Ubuntu 16.04
• default python version: 2.7.12
• Vim: 8.2.2251

Answer 1

Well, bandit and mypy are not found, so not run at all.

flake8, pycodestyle, and pylint run. Flake8 and Pylint don't have output, and the style stuff is from pycodestyle.

If you want a more "compiler"-like experience, you'll need to enable and possibly install other linters (which ones to use is a bit of a personal preference; I have them all enabled for python, but in practice have only mypy, pyls, and pycodestyle enabled).