utils for my recipes, with functions, etc.

utils.py

#!/usr/bin/python

import sys
import numpy as np
import random

def is_input_valid(question, input):
    valid = {"yes": True, "y": True, "ye": True,
             "no": False, "n": False}
    if input is None:
        prompt = " [yes/no] "
    elif default == "yes":
        prompt = " [Y/n] "
    elif default == "no":
        prompt = " [y/N] "
    else:
        raise ValueError("invalid default answer: '%s'" % input)

    while True:
        sys.stdout.write(question + prompt)
        choice = raw_input().lower()
        if input is not None and choice == '':
            return valid[choice]
        elif choice in valid:
            return valid[choice]
        else:
            sys.stdout.write("Please respond with 'yes' or 'no' "
                             "(or 'y' or 'n').\n")

def is_meal_valid(question, prompt):
	#for meal prompt = ['breakfast', 'lunch', 'dinner']
    prompt_string = '/'.join(prompt)
    if prompt is not None:
        sys.stdout.write(question + ' [' + prompt_string + '] ')
        choice = raw_input().lower()
        if choice == '' or choice in prompt:
            return choice
        else:
            sys.stdout.write("Please respond with %s \n" % ' or '.join(prompt))
            return False

def print_current_pantry(current_pantry):
    sys.stdout.write('Your current pantry includes: ')
    sys.stdout.write(', '.join(current_pantry))

def make_breakfast(current_pantry, veggies):
    #I like eggs the most! If I have eggs, then I want eggs, else, something else
    if 'eggs' in current_pantry:
        #eggs either scrambled OR omlette with 3 veggies
        egg_style = random.choice(['scrambled', 'in an omlette'])
        shuffled_veggies = randomize_veggies(veggies)
        return 'Let\'s have our eggs %s with %s! Bon Apetit.' % (egg_style , shuffled_veggies)
    elif 'bread' in current_pantry or 'potatoes' in current_pantry:
        # toast with fruit or potatoes
        return 'Let\'s have %s!' % (random.choice(['potatoes', 'toast with fruit']))
    else:
        return 'Looks like it\'s just you and that giant cup of coffee this morning...' 
        

def make_lunch_or_dinner(carb, staples, current_pantry, veggies):
    #My lunches and dinners generally have a carb and veggie component. Let's make that happen.
    shuffled_veggies = randomize_veggies(veggies)
    this_carb = random.choice(carb)
    lunch_or_dinner = ''
    if this_carb is 'bread':
        lunch_or_dinner = 'We\'re going to make a sandwich with grilled %s ' % shuffled_veggies
        if 'cheese' in current_pantry:
            lunch_or_dinner = lunch_or_dinner + 'with cheese!'
        elif 'ketchup' in current_pantry:
            lunch_or_dinner = lunch_or_dinner + 'with ketchup!'
    if this_carb is 'noodles':
        noodle_style = random.choice(['yakisoba', 'ramen noodles'])
        lunch_or_dinner = 'We\'re going to make %s with %s!' % (noodle_style, shuffled_veggies)
    if this_carb is 'rice' or this_carb is 'quinoa':
        grain_style = random.choice(['fried rice with soy/tamari', 'indian style sabji'])
        lunch_or_dinner = 'We\'re going to make %s with %s!' % (grain_style, shuffled_veggies)
    return lunch_or_dinner 

def randomize_veggies(veggies):
    np.random.shuffle(veggies)
    return ', '.join(veggies[0:3])