Déterminez si la chaîne est formatable

import string

formatter = string.Formatter()


def is_formattable(s: str):
    for e in formatter.parse(s):
        if isinstance(e[1], str):
            return True
    return False


print(is_formattable("Hello"))  # False
print(is_formattable("{{}}"))  # False (Double évasion)
print(is_formattable("{}"))  # True
print(is_formattable("{}{}"))  # True
print(is_formattable("{a}{b}{c}"))  # True
print(is_formattable("{a:int}"))  # True

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