class SignedIntConverter(IntegerConverter):
regex = r'-?\d+'
app.url_map.converters['signed_int'] = SignedIntConverterThen use <signed_int:user_id> in your route.
Source: pallets/flask#2643 (comment)
class SignedIntConverter(IntegerConverter):
regex = r'-?\d+'
app.url_map.converters['signed_int'] = SignedIntConverterThen use <signed_int:user_id> in your route.
Source: pallets/flask#2643 (comment)