from datetime import date
from flask.json import JSONEncoder
import string
import random

class CustomJSONEncoder(JSONEncoder):
    def default(self, obj):
        try:
            if isinstance(obj, date):
                return obj.isoformat()
            iterable = iter(obj)
        except TypeError:
            pass
        else:
            return list(iterable)
        return JSONEncoder.default(self, obj)

def generate_activation_code(length=5):
	chars = string.ascii_lowercase + string.digits
	# remove easily misintepreted chars
	chars = chars.translate(None,'0oil1wv')
	return ''.join(random.choice(chars) for _ in range(length))