Python Advanced (2023-09-25 - 2023-09-27)

JSON

user = {
    'id': 1,
    'firstname': 'Joerg',
    'lastname': 'Faschingbauer',
}

user

{'id': 1, 'firstname': 'Joerg', 'lastname': 'Faschingbauer'}

type(user)

dict

import json

data_to_send = json.dumps(user)

type(data_to_send)

str

print(data_to_send)

{"id": 1, "firstname": "Joerg", "lastname": "Faschingbauer"}

repr(data_to_send)

'\'{"id": 1, "firstname": "Joerg", "lastname": "Faschingbauer"}\''

Now data_to_send is sent over a tcp connection, and received into a variable data_received

data_received = data_to_send

type(data_received)

str

user_received = json.loads(data_received)

user_received

{'id': 1, 'firstname': 'Joerg', 'lastname': 'Faschingbauer'}

Equality vs. Identity

d1 = {
    'id': 1,
    'firstname': 'Joerg',
}

d2 = {
    'id': 1,
    'firstname': 'Joerg',
}

d1 == d2

True

d1 is d2

False

id(d1)

140048588115008

id(d2)

140048588341376

id(d1) == id(d2)

False

Functions Are Objects

def add(a, b):
    return a + b

add(1, 2)

3

summe = add

summe(1,2)

3