def _get_dotted_config_value()

in awscli/customizations/configure/get.py [0:0]


    def _get_dotted_config_value(self, varname):
        parts = varname.split('.')
        num_dots = varname.count('.')

        # Logic to deal with predefined sections like [preview], [plugin] and
        # etc.
        if num_dots == 1 and parts[0] in PREDEFINED_SECTION_NAMES:
            full_config = self._session.full_config
            section, config_name = varname.split('.')
            value = full_config.get(section, {}).get(config_name)
            if value is None:
                # Try to retrieve it from the profile config.
                value = full_config['profiles'].get(
                    section, {}).get(config_name)
            return value

        if parts[0] == 'profile':
            profile_name = parts[1]
            config_name = parts[2]
            remaining = parts[3:]
        # Check if varname starts with 'default' profile (e.g.
        # default.emr-dev.emr.instance_profile) If not, go further to check
        # if varname starts with a known profile name
        elif parts[0] == 'default' or (
                parts[0] in self._session.full_config['profiles']):
            profile_name = parts[0]
            config_name = parts[1]
            remaining = parts[2:]
        else:
            profile_name = self._session.get_config_variable('profile')
            if profile_name is None:
                profile_name = 'default'
            config_name = parts[0]
            remaining = parts[1:]

        value = self._session.full_config['profiles'].get(
            profile_name, {}).get(config_name)
        if len(remaining) == 1:
            try:
                value = value.get(remaining[-1])
            except AttributeError:
                value = None
        return value