[BUG] Python Generator: '€' symbol in enum generates invalid code

[rubenhoenle]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Euro symbol in enum creates invalid code.

openapi-generator version

v7.17.0 (latest)

OpenAPI declaration file content or url

openapi: 3.1.0
info:
  version: 0.1.0
  title: ''
  description: ''
components:
  schemas:
    Currency:
      type: string
      enum:
        - "$"
        - "€"

Generation Details

# build openapi generator from source
./mvnw clean install
# generate python code
java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate --generator-name python --input-spec spec.yaml --output "euro-fix-output"

Steps to reproduce

Look into euro-fix-output/openapi_client/models/currency.py. The generated enum looks like this:

class Currency(str, Enum):
    """
    Currency
    """

    """
    allowed enum values
    """
    DOLLAR = '$'
    € = '€' # <------------- this is causing problems

    @classmethod
    def from_json(cls, json_str: str) -> Self:
        """Create an instance of Currency from a JSON string"""
        return cls(json.loads(json_str))

Instead it should look like this:

class Currency(str, Enum):
    """
    Currency
    """

    """
    allowed enum values
    """
    DOLLAR = '$'
    EURO = '€' # <------------- expected code

    @classmethod
    def from_json(cls, json_str: str) -> Self:
        """Create an instance of Currency from a JSON string"""
        return cls(json.loads(json_str))

Related issues/PRs

Suggest a fix

Will contribute it 😄

[wing328]

closed via #22144