Averroes

from postimport import when_imported

@when_imported('threading')
def warn_threads(mod):
    print('Threads? Are you crazy?')

if __name__ == '__main__':
    import threading

Averroes

from postimport import when_imported
from functools import wraps


def logged(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        print('Calling', func.__name__, args, kwargs)
        return func(*args, **kwargs)
    return wrapper

Averroes

# postimport.py

import importlib
import sys
from collections import defaultdict

_post_import_hooks = defaultdict(list)

class PostImportFinder:
    def __init__(self):

Averroes

import mymodule
a = mymodule.A()
a.spam()

b = mymodule.B()
b.bar()

Averroes

# echoclient.py
#
# An example of a client that connects to an SSL server
# and verifies its certificate

from socket import socket, AF_INET, SOCK_STREAM
import ssl

s = socket(AF_INET, SOCK_STREAM)

Averroes

from socket import socket, AF_INET, SOCK_STREAM
from socket import SOL_SOCKET, SO_REUSEADDR
import ssl

KEYFILE = 'server_key.pem'   # Private key of the server
CERTFILE = 'server_cert.pem' # Server certificate (given to client)

def echo_client(s):
    while True:
        data = s.recv(8192)

Averroes

# ssl_xmlrpc_client.py
#
# An XML-RPC client that verifies the server certificate

from xmlrpc.client import SafeTransport, ServerProxy
import ssl

class VerifyCertSafeTransport(SafeTransport):
    def __init__(self, cafile, certfile=None, keyfile=None):
        super().__init__()

Averroes

# ssl_xmlrpc_server.py
#
# An example of an SSL-XMLRPC Server.

import ssl
from xmlrpc.server import SimpleXMLRPCServer
from sslmixin import SSLMixin

class SSLSimpleXMLRPCServer(SSLMixin, SimpleXMLRPCServer):
    pass

Averroes

import ssl

class SSLMixin:
    def __init__(self, *args, 
                 keyfile=None, certfile=None, ca_certs=None, cert_reqs=ssl.CERT_NONE,
                 **kwargs):
        self._keyfile = keyfile
        self._certfile = certfile
        self._ca_certs = ca_certs
        self._cert_reqs = cert_reqs

Averroes

from urllib.request import urlopen

u = urlopen('http://localhost:8080/hello?name=Guido')
print(u.read().decode('utf-8'))

u = urlopen('http://localhost:8080/localtime')
print(u.read().decode('utf-8'))