ramalho

while True:
    filename = input('Enter the name of a file to open: ')
    try:
        # open for reading in binary mode, so any file will do
        fin = open(filename, 'rb')
    except OSError as exc:
        print('Something untoward happened [%r]' % exc)
    else:
        break

ramalho

while True:
    response = input('Enter a number: ')
    try:
        n = float(response)
    except ValueError:
        print('%r is not a number' % response)
    else:
        break

print('Nice number. Thanks!')

ramalho

def backtracking_sort(input_list, output_list, level):

    print(level * '  ', input_list, output_list);

    # Reject - this path doesn't lead to any solution
    if len(output_list) > 1 and output_list[-2] > output_list[-1]:
        return False

    # Accept - one solution

ramalho

"""
=========================================================
Classe ObjetoJS: imitação simples de um objeto JavaScript
=========================================================

Uma instância é construída passando argumentos nomeados:

    >>> o = ObjetoJS(z=33, x=11, y=22)

A representação textual de uma instância parece a chamada do

ramalho

"""
romanos.py - arabicos para romanos


    >>> ara2rom(1)
    'I'
    >>> ara2rom(2)
    'II'
    >>> ara2rom(3)
    'III'

ramalho

import pingo
from time import sleep
 
board = pingo.detect.MyBoard()
pin = board.pins[13]
pin.mode = pingo.OUT

led = pingo.parts.Led(pin)
 
led.blink(10, .5, .1)  # new thread

ramalho

import pingo
from time import sleep

board = pingo.detect.MyBoard()
led = board.pins[13]
led.mode = pingo.OUT

while True:
    led.toggle()
    sleep(1)

ramalho

# spinner_asyncio.py

# credits: Example by Luciano Ramalho inspired by
# Michele Simionato's multiprocessing example
# source:
# http://python-3-patterns-idioms-test.readthedocs.org/en/latest/CoroutinesAndConcurrency.html

import sys
import asyncio

ramalho

#!/usr/bin/env python3

# Copyright 2014 Brett Slatkin, Pearson Education Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#

ramalho

# Code below is the expansion of the statement:
#
# RESULT = yield from EXPR
#
# Copied verbatim from the Formal Semantics section of
# PEP 380 -- Syntax for Delegating to a Subgenerator
#
# https://www.python.org/dev/peps/pep-0380/#formal-semantics

_i = iter(EXPR)