Json dictionnary on Redis

[DeaD_EyE]

The function json.loads takes 1 positional argument but 2 were given.
The error message is very helpful.

In line number 13, you should change the code from:

counts = json.loads(redis.get('hits'),('{}'))

to

counts = json.loads(redis.get('hits'))

When your intention was to have a default argument, if the key does not exist in redis (returns None), you can use following trick:

counts = json.loads(redis.get('hits')) or {'hits': 0, 'something-else': 'foo'}

First the key 'hits' is returned by redis. If this key is None the dict on the right side is assigned to the name counts. The first object, which evaluates to True is taken.

0, 0.0, (0.0+0j), False, None, empty: bytes, bytearray, list, tuple, dict, set evaluates to False.

bool(None) == False
bool({}) == False
bool([]) == False

You can use this knowledge for default values:

def hello(greeting=''):
    '''
    print greeting on the screen
    if greeting is empty, Hello World is printed
    '''
    text = greeting or 'Hello World'
    print(text)