How to get list of all variables in jinja 2 templates

jinja2
Kracekumar picture Kracekumar · Nov 24, 2011 · Viewed 25.8k times · Source

I am trying to get list of all variables and blocks in a template. I don't want to create my own parser to find variables. I tried using following snippet.

from jinja2 import Environment, PackageLoader
env = Environment(loader=PackageLoader('gummi', 'templates'))
template = env.get_template('chat.html')

template.blocks is dict where keys are blocks, how can I get all variables inside the blocks ?

Answer

Kracekumar picture Kracekumar · Nov 27, 2011

Since no one has answered the question and I found the answer

from jinja2 import Environment, PackageLoader, meta
env = Environment(loader=PackageLoader('gummi', 'templates'))
template_source = env.loader.get_source(env, 'page_content.html')
parsed_content = env.parse(template_source)
meta.find_undeclared_variables(parsed_content)

This will yield list of undeclared variables since this is not executed at run time, it will yield list of all variables.

Note: This will yield html files which are included using include and extends.

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