[Python] How to a match any sequence of text until "#{" in pyparsing

I want to do string templating with py parsing. I have failed multiple times to define a grammar that can parse a string with inserted text inbetween "#{" and "}" (seems pretty basic) :

Example of grammar which doesn't work :

from pyparsing import CharsNotIn, FollowedBy, Group, Literal, OneOrMore, Suppress
# Define the unwanted sequence
hash_tag = Suppress(Literal('#{')) + CharsNotIn('}') + Suppress(Literal('}'))
text_part = CharsNotIn('#{')
# Combine the parts to match the entire string
parser = OneOrMore(Group(hash_tag) | text_part)
test_string = "Some text \n with a stranded # and a stranded { then a correct #{ insertion of \n some # other text } and then some text"

result = parser.searchString(test_string)
expected_result = ["Some text \n with a stranded # and a stranded { then a correct ",[" insertion of \n some # other text "]," and then some text"]
print(result)


The result is not the expected result (I get ["Some text \n with a stranded "])

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