import os
from pprint import pprint
from environs import Env, EnvValidationError
from marshmallow.validate import OneOf, Email, Length, Range
os.environ["TTL"] = "-2"
os.environ["NODE_ENV"] = "invalid"
os.environ["EMAIL"] = "^_^"
env = Env(eager=False)
TTL = env.int("TTL", validate=Range(min=0, max=100))
NODE_ENV = env.str("NODE_ENV",
validate=OneOf(["production", "development"],
error="NODE_ENV must be one of: {choices}"))
EMAIL = env.str("EMAIL", validate=[Length(min=4), Email()])
# This will raise an error with the combined validation messages
try:
env.seal()
except EnvValidationError as error:
pprint(error.error_messages)
