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from typing import Type, Union


class BaseType:
    pass

class EvenType:
    pass

class OddType:

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import requests


class Req1:
  
    def __init__(self):
        self._session = requests.Session()
   
    def do_req():
        with self._session:

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def register_cleanup_hook(app: fastapi.FastAPI):

    @app.on_event('shutdown')
    async def cleanup_seq_handler():
        print('Worker shutting down. Cleaning up ...')
        logger.info('Worker shutting down. Cleaning up ...')
        
        # do some cleanup ...

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# THE SOLUTION IS THE FUNCTION `generate_first_elements`

# write a function which takes an iterable of iterators as
# an argument and returns a generator of first elements of
# the input iterators


def generate_first_elements(iterable_arg):

    # return a "generator object" that produces the first

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from functools import wraps


def log(utf8_string, tags):
    # do some logging
    pass


def log_on_exception(*tags):
    """Decorate a function to log any exception it raises.

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A Brief Introduction to Fabric

Fabric is a deployment management framework written in Python which makes remotely managing multiple servers incredibly easy. If you've ever had to issue a change to a group servers, this should look pretty familiar:

for s in $(cat servers.txt); do ssh $s service httpd graceful; done

Fabric improves on this process by providing a suite of functions to run commands on the servers, as well as a number of other features which just aren't possible in a simple for loop. While a working knowledge of Python is helpful when using Fabric, it certainly isn't necessary. This tutorial will cover the steps necessary to get started with the framework and introduce how it can be used to improve on administering groups of servers.

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import socket

hostname, sld, tld, port = 'www', 'integralist', 'co.uk', 80
target = '{}.{}.{}'.format(hostname, sld, tld)

# create an ipv4 (AF_INET) socket object using the tcp protocol (SOCK_STREAM)
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# connect the client
# client.connect((target, port))

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tcp        0      0 192.163.X.Y:53           0.0.0.0:*                   LISTEN      
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      
tcp        0      0 :::22                       :::*                        LISTEN      
unix  2      [ ACC ]     STREAM     LISTENING     118650122 /var/run/dovecot/log-errors
unix  2      [ ACC ]     STREAM     LISTENING     118650220 /var/run/dovecot/anvil-auth-penalty
unix  2      [ ACC ]     STREAM     LISTENING     118650224 /var/run/dovecot/quota-status
unix  2      [ ACC ]     STREAM     LISTENING     118650227 /var/run/dovecot/master

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###########
# Python 2:
###########
try:
    raise Exception
except Exception as e:
    s,r = getattr(e, 'message') or str(e), getattr(e, 'message') or repr(e)
    print 's:', s, 'len(s):', len(s)
    print 'r:', r, 'len(r):', len(r)
    

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; Sample supervisor config file.

[unix_http_server]
file=/tmp/supervisor.sock   ; (the path to the socket file)
;chmod=0700                 ; sockef file mode (default 0700)
;chown=nobody:nogroup       ; socket file uid:gid owner
;username=user              ; (default is no username (open server))
;password=123               ; (default is no password (open server))

;[inet_http_server]         ; inet (TCP) server disabled by default