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• Here is how to convert string into lower or upper case in Jinja2, https://stackoverflow.com/questions/23195321/how-to-convert-string-to-uppercase-lowercase-in-jinja2.

{% set string_variable = "any_string".lower() %}
{% set string_variable = "any_string".upper() %}

• This reference is taken from this StackOverflow discussion, https://stackoverflow.com/questions/23195321/how-to-convert-string-to-uppercase-lowercase-in-jinja2.