How to check whether a string is a template?

[sisp]

What is the best way to check whether a string is a template, i.e. whether it contains template syntax? I've looked into Environment.lex(...) to get the tokens and derive the check from that information by checking whether there is any token of type other than data in the tokens list:

def is_template_string(value: str, env: jinja2.Environment) -> bool:
    return any(token_type != jinja2.lexer.TOKEN_DATA for _, token_type, _ in env.lex(value))

Is this approach correct and is there anything easier I could do? And would it be an interesting feature to be added to the library?

[creatorrr]

this might be simpler and faster, no?

def is_jinja(s):
    return re.search('{{.+}}',s) or re.search('{%.+%}',s)

[creatorrr]

from: https://stackoverflow.com/questions/66041586/check-whether-string-is-jinja2-template-or-not