fn enable_truncation()

in bindings/python/src/tokenizer.rs [732:783]
50 lines of code
4 McCabe index (conditional complexity)

    fn enable_truncation(
        &mut self,
        max_length: usize,
        kwargs: Option<&Bound<'_, PyDict>>,
    ) -> PyResult<()> {
        let mut params = TruncationParams {
            max_length,
            ..Default::default()
        };

        if let Some(kwargs) = kwargs {
            for (key, value) in kwargs {
                let key: String = key.extract()?;
                match key.as_ref() {
                    "stride" => params.stride = value.extract()?,
                    "strategy" => {
                        let value: String = value.extract()?;
                        params.strategy = match value.as_ref() {
                            "longest_first" => Ok(TruncationStrategy::LongestFirst),
                            "only_first" => Ok(TruncationStrategy::OnlyFirst),
                            "only_second" => Ok(TruncationStrategy::OnlySecond),
                            _ => Err(PyError(format!(
                                "Unknown `strategy`: `{}`. Use \
                                 one of `longest_first`, `only_first`, or `only_second`",
                                value
                            ))
                            .into_pyerr::<exceptions::PyValueError>()),
                        }?
                    }
                    "direction" => {
                        let value: String = value.extract()?;
                        params.direction = match value.as_ref() {
                            "left" => Ok(TruncationDirection::Left),
                            "right" => Ok(TruncationDirection::Right),
                            _ => Err(PyError(format!(
                                "Unknown `direction`: `{}`. Use \
                                 one of `left` or `right`.",
                                value
                            ))
                            .into_pyerr::<exceptions::PyValueError>()),
                        }?
                    }
                    _ => println!("Ignored unknown kwarg option {}", key),
                }
            }
        }

        if let Err(error_message) = self.tokenizer.with_truncation(Some(params)) {
            return Err(PyError(error_message.to_string()).into_pyerr::<exceptions::PyValueError>());
        }
        Ok(())
    }