mike11339

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

mike11339

$ curl --help
Usage: curl [options...] <url>
     --abstract-unix-socket <path> Connect via abstract Unix domain socket
     --alt-svc <file name> Enable alt-svc with this cache file
     --anyauth       Pick any authentication method
 -a, --append        Append to target file when uploading
     --basic         Use HTTP Basic Authentication
     --cacert <file> CA certificate to verify peer against
     --capath <dir>  CA directory to verify peer against
 -E, --cert <certificate[:password]> Client certificate file and password

mike11339

Certificate and key commands

1. Verify connection:

$ openssl s_client -connect <host:port> -debug -state -cert <path_to_your_cert.pem> -key <path_to_your_key.pem> -CAfile <path_to_your_CA_cert.pem>

2. Export client cert from PKCS12 keystore to PEM:

mike11339

class Teacher(Job):
    def __init__(self, person_name, school):
        super().__init__(person_name)
        self.school = school

    def task(self):
        print("working")
        
teacher = Teacher2("xiaoxu", "TU delft")
print(teacher.school)

mike11339

class Job:
    def __init__(self, person_name):
        self.name = person_name

    def task(self):
        print("working")

class Teacher(Job):
    def task(self):
        print("teach students")

mike11339

class Job:
    def __init__(self, person_name):
        self.name = person_name

    def task(self):
        print("working")

class Teacher(Job):
    def task(self):
        print("teach students")

mike11339

from confluent_kafka import Producer
from python_kafka import Timer

producer = Producer({'bootstrap.servers': 'localhost:9092'})
msg = ('kafkatest' * 20).encode()[:100]
size = 1000000

def delivery_report(err, decoded_message, original_message):
    if err is not None:
        print(err)

mike11339

from confluent_kafka import Consumer, TopicPartition
size = 1000000

consumer = Consumer(
    {
        'bootstrap.servers': 'localhost:9092',
        'group.id': 'mygroup',
        'auto.offset.reset': 'earliest',
    }
)

mike11339

class Kid(Dad, Mum):
    def __init__(self):
        Mum.__init__(self)
        
kid = Kid()
print(kid.eye_color)
# brown

mike11339

class Dad:
    def __init__(self):
        self.eye_color = "blue"
        self.hair_color = "black"
        self.city = "Amsterdam"
        
    def swim(self):
        print("I can swim")

class Mum: