countries
countries(region=None)
Returns a list of countries, optional by a region (see regions())
Returns:
list, datahub_core.datasets.Country
list {
    short_name: str
    alpha2_code: str
    alpha3_code: str
    locale: str
    currency: str
    region: str
    country_id: str
}
Example:
from datahub_core.data import countries
all_countries = countries()
nam_countries = countries('NAM')
emea_countries = countries('EMEA')
apac_countries = countries('APAC')
latam_countries = countries('LATAM')