A jinja2 dialect for latex templating in python.
Project description
TempLatex
A jinja2 dialect for latex templating in python.
Quick Start
pip install templatex
from templatex import Environment
from jinja2 import FileSystemLoader
env = Environment(loader=FileSystemLoader('./template_folder'))
template = env.get_template("chapter.latex")
print(template.render(the="variables", go="here"))
Why not the default jinja2?
jinja2's default escape works great for HTML but is not user-friendly for latex because latex heavily uses curly brackets {} .
For example, if you want to produce the following latex code:
x = \frac{b}{c}
Where b and c will be replaced by an actual number, for example: {"b": 42, "c": 3}
.
The jinja2 version will be:
from jinja2 import Template
template = """
x = \\frac{{{ b }}}{{"{"}}{{ c }}{{"}"}}
"""
# {{"}"}} will render to }
data = {
'a': 13,
'b': 42,
'c': 3
}
j2_template = Template(template)
print(j2_template.render(data))
You will notice that because both latex and jinja2 heavily rely on {}
, the template string will be populated
with {}
, make it hard to read and modify.
In templatex
, we can write the following code:
from templatex import Template
template = """
x = \\frac{@= b =@}{@= c =@}
"""
data = {
'a': 13,
'b': 42,
'c': 3
}
j2_template = Template(template)
print(j2_template.render(data))
What this package changes
Changed Default Jinja2 configuration.
Template changes jinja2's default configuration to the following:
Enviroment(
loader,
trim_blocks=True,
block_start_string='@@',
block_end_string='@@',
variable_start_string='@=',
variable_end_string='=@',
autoescape=False,
comment_start_string='\#{',
comment_end_string='}',
line_statement_prefix='%%',
line_comment_prefix='%#',
)
As a result, you only need to adopt the following syntax:
- variable render:
@= var_name =@
- block logic:
@@ for my_item in my_collection @@
- comment:
\#{ your comment }
Add a latex escape filter
Jinja2, by default, will perform auto HTML escaping on rendered variables, but I couldn't figure out how to change its default escape filter implementation. As a result, we disabled this feature and provided a latex escape filter so template authors can manually escape string variables as needed.
For example:
When rendering @= my_var =@
, and if my_var="$5.0"
, the resulting latex code cannot be compiled due to the
unescaped $
character.
You can use @= my_var | escape_latex =@
, where the escape_latex
filter will escape $
character to valid
latex: \$
.
Other features
Since this is still the same jinja2 engine at its core, users should refer to the jinja2 site for documentation on other features.
Inspiration
I adopted the solution from this answer on stackoverflow, and added some modifications.
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