Python basic logging boilerplate for console log

0.md

https://docs.python.org/2.7/library/logging.html https://docs.python.org/2.7/library/logging.config.html https://docs.python.org/2.7/whatsnew/2.7.html#pep-391-dictionary-based-configuration-for-logging

basic_logging.py

import logging

log = logging.getLogger()
handler = logging.StreamHandler()
handler.setFormatter(logging.Formatter('%(levelname)s: %(message)s'))
log.addHandler(handler)
log.setLevel(logging.INFO)

log.info('Hello World!')

example1.py

import logging

log = logging.getLogger()
handler = logging.StreamHandler()
formatter = logging.Formatter('%(levelname)s: %(message)s')
handler.setFormatter(formatter)
log.addHandler(handler)
log.setLevel(logging.INFO)


class Number(object):
    def __init__(self, default=0):
        self._value = default

    def getValue(self):
        return self._value

    def setValue(self, value):
        self._value = value


class Add(object):
    number1 = Number()
    number2 = Number()
    output = Number()

    _cache = {
    }

    @classmethod
    def cache(cls, inputs):
        if inputs in cls._cache:
            return cls._cache[inputs]

        log.debug("Cache miss: input {0}".format(inputs))

        return None

    @classmethod
    def function(cls, number1, number2):
        return number1 + number2

    def execute(self):
        number1 = self.number1.getValue()
        number2 = self.number2.getValue()

        result = self.cache((number1, number2))
        if result is None:
            result = self.function(number1, number2)
            self._cache[(number1, number2)] = result

        self.output.setValue(result)

add = Add()
add.execute()
print add._cache
add.number1.setValue(100)
log.setLevel(logging.DEBUG)
add.execute()
print add._cache
log.setLevel(logging.INFO)
add.number2.setValue(300)
add.execute()
print add._cache