I would like to do something like this in jinja2:

   {{ lengthy_snap_expression }}, {% trim -%}
   {{ lengthy_crackle_expression }}, {% trim -%}
   {{ lengthy_pop_expression }}

to produce

   SNAP, CRACKLE, POP

where SNAP, CRACKLE, and POP are the results of evaluating lengthy_snap_expression, lengthy_crackle_expression and lengthy_pop_expression, all of which are lengthy expressions in my case

My intent is to keep the template readable but remove space from the generated output.

Otherwise it seems like I have to write on one line

{{ lengthy_snap_expression }}, {{ lengthy_crackle_expression }}, {{ lengthy_pop_expression }}

and in my case this can be several hundred characters which would be better split for readability in the template itself.

Any suggestions?

I would like to do something like this in jinja2:

   {{ lengthy_snap_expression }}, {% trim -%}
   {{ lengthy_crackle_expression }}, {% trim -%}
   {{ lengthy_pop_expression }}

to produce

   SNAP, CRACKLE, POP

where SNAP, CRACKLE, and POP are the results of evaluating lengthy_snap_expression, lengthy_crackle_expression and lengthy_pop_expression, all of which are lengthy expressions in my case

My intent is to keep the template readable but remove space from the generated output.

Otherwise it seems like I have to write on one line

{{ lengthy_snap_expression }}, {{ lengthy_crackle_expression }}, {{ lengthy_pop_expression }}

and in my case this can be several hundred characters which would be better split for readability in the template itself.

Any suggestions?

• jinja2
• removing-whitespace

2 Answers 2

Comments seem to do the trick, although somewhat unsatisfyingly so.

   {{ lengthy_snap_expression }}, {#
 #}{{ lengthy_crackle_expression }}, {#
 #}{{ lengthy_pop_expression }}

Dashes can be used to specify manual whitespace trimming in {{ ... }} and {# ... #} just like they do in {% ... %}, so if you render:

{{ 'SNAP' }},
{{- 'CRACKLE' }},
{{- 'POP' }}

you'd get:

SNAP,CRACKLE,POP

and if you want to preserve the whitespace after each comma you can use a dash at the end of an empty comment following a whitespace after each comma:

{{ 'SNAP' }}, {# -#}
{{ 'CRACKLE' }}, {# -#}
{{ 'POP' }}

which outputs:

SNAP, CRACKLE, POP