How to get list of all variables in jinja 2 templates

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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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