How to make a newline without autoindent

Question

Is there a command to make a newline without the autoindent? In other words, I want o and O to normally autoindent, but is there another command that will not autoindent for just the duration of that command?

Alternatively (if there isn't a way to that exactly), what's a better workaround than just backspacing a ton after autoindenting many tabs too far.

---

Example

if some_check():
    self.some_long_function_name(withlots, ofargs
                                 andmaybe=keywordargs)
                               # ^ Indents to the caret

Pressing o on the andmaybe=keywordargs line leaves me way more indented than I want to be.

Answer 1

I don't think there is an normal mode command to start a new line without indent. You can, however, remove the indent while in insert mode with the keystrokes 0Ctrl-D, and so it's easy to set up new mappings to do so:

nnoremap <leader>o o0<C-D>
nnoremap <leader>O O0<C-D>

Personally, though, I'd install an indent plugin to handle this for you*.

I use vim-python-pep8-indent which handles your example nicely.

_{Or indeed, just use the Python indent script included in Vim (via the :filetype command) instead of the 'autoindent' setting. This is the one @Ralf describes in the comments.}