Method fmt

python3-sys/build.rs:15–23

(&self, f: &mut fmt::Formatter)

impl fmt::Display for PythonVersion {
    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
        self.major.fmt(f)?;
        f.write_str(".")?;
        match self.minor {
            Some(minor) => minor.fmt(f)?,
            None => f.write_str("*")?,
        };
        Ok(())
    }
}

const CFG_KEY: &str = "py_sys_config";