How to type snippet keywords when you need it

Question

I am new to vim, I just wonder if I want to actually type the keyword in some cases, how do I do it? Do I need to disable the snippets? For example, if I use impd as keyword for import pandas as pd, then how do I actually type impd without triggering the snippet? I am using Plugin Ultisnip, here's the relevant part in my .vimrc

Plug 'SirVer/ultisnips'  
Plug 'honza/vim-snippets' 
let g:UltiSnipsExpandTrigger = '<tab>' 
let g:UltiSnipsJumpForwardTrigger ='<tab>' 
let g:UltiSnipsJumpBackwardTrigger = '<s-tab>' 
let g:UltiSnipsSnippetDirectories=["UltiSnips"]

And I config the plugin with the following two snippets for LaTeX copied from internet:

snippet beg "begin{} / end{}" bA
\begin{$1}
    $0
\end{$1}
endsnippet

snippet mk "Math" wA
$${1}$`!p
if t[2] and t[2][0] not in [',', '.', '?', '-', ' ']:
    snip.rv = ' '
else:
    snip.rv = ''
`$2
endsnippet

Then the behavior is: the snippet beg only triggers if I type it in a new line, and mk triggers no matter where I type, is there a way to, say, type "mk" without triggering it or disabling the snippet?

Thanks!

Answer 1

Those snippets mentioned in the question have the auto-expand option enabled, as there is an 'A' included in the options of each snippet (eg. bA, wA). To disable auto-expansion of a snippet, remove the 'A'. For example,

snippet mk "Math" w
$${1}$`!p
if t[2] and t[2][0] not in [',', '.', '?', '-', ' ']:
    snip.rv = ' '
else:
    snip.rv = ''
`$2
endsnippet

Now, with <tab> as the trigger, typing mk stays as is, but mk<tab> expands to $$, with the cursor in between the $s.

For more information, have a look at the various snippet options :h Ultisnips-snippet-options (you may need to run :helptags ALL before this).