A motley crew of useful things you might want to do (in Python)

tidbits.py

#
# Make 1024 binary numbers
#
import itertools
binary_numbers = [''.join(digits)
                  for digits in itertools.product(*[['0', '1'] for _ in range(10)])]
print(binary_numbers)

#
# Use types to enforce types of values used in an LRU cache
#
from typing import Generic, TypeVar, Any

T = TypeVar('T')

class TypedLRUCache(Generic[T]):
  def __init__(self, max_size: int = 256) -> None:
    raise NotImplementedError
    
  def get(self, key: Any, default: T) -> T:
    raise NotImplementedError
    
  def put(self, key: Any, value: T) -> None:
    raise NotImplementedError
    
example_cache = TypedLRUCache[str](max_size=10)
example_cache.put("first_name", 10)              # Fails because 10 is not a str

#
# Very simple SSL-enabled HTTP endpoint
#
import BaseHTTPServer
import ssl

class Handler(BaseHTTPServer.BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(302)
        self.send_header('Location', 'http://localhost:8000/')
        self.end_headers()
        self.wfile.write('')

httpd = BaseHTTPServer.HTTPServer(('localhost', 4443), Handler)
httpd.socket = ssl.wrap_socket (httpd.socket, server_side=True,
                                certfile='yourpemfile.pem')
httpd.serve_forever()

#
# char/number conversion stuff
#
'\n'.encode('hex')          # python2: '0a'
print('\x0a')               # python2: prints a string containing a newline
"7a7a7a7a".decode('hex')    # python2: "zzzz"
bytes.fromhex('7a7a7a7a').decode()    # python3: "zzzz"