Python: Recipe Program

Question

Я делаю проект программы рецептов для GCSE Computing. Он хранит рецепты в TXT-документах, а затем по запросу открывает и представляет информацию для чтения.

В данный момент времени он хранит рецепт в верхней части .txt-файла и ингредиентов внизу. Он запускает thorugh heading1 для рецепта и разбивает его на презентацию. Затем он должен пройти через рубрику2 и просмотреть каждую колонку, ингредиенты, вес и измерение. Затем, используя цикл for, будет проходить через списки и представлять ингредиенты вместе с их соответствующим весом и измерением.

код, как показано ниже:

#------------------------------------------------------------------------------- 
# Name:  Recipe Holder 
# Purpose:  Hold recipes 
# 
# Author:  Ashley Collinge 
# 
# Created:  25/02/2013 
# Copyright: (c) Ashley Collinge 2013 
#------------------------------------------------------------------------------- 
def menu(): 
    print "Recipe Holder" 
    print "Use the numbers to navigate the menu." 
    print "" 
    print "" 
    print "1) View Recipes" 
    print "2) Add Recipes" 
    print "3) Delete Recipe" 
    print "" 
    choice_completed = False 
    while choice_completed == False: 
     choice = raw_input("") 
     if choice == "1": 
      choice_completed = True 
      view_recipe() 
     elif choice == "2": 
      choice_completed = True 
      add_recipe() 
     elif choice == "3": 
      choice_completed = True 
      delete_recipe() 
     else: 
      choice_completed = False 

def view_recipe(): 
    print "" 
    print "" 
    mypath = "/recipe" 
    from os import listdir 
    from os.path import isfile, join 
    onlyfiles = [ f for f in listdir("H:/Recipes/recipes") if isfile(join("H:/Recipes/recipes",f)) ] 
    a = -1 
    for i in onlyfiles: 
     a = a +1 
     print a, i 
    print "" 
    print "Type in the number of the recipe you would like to view, below and press enter." 
    print "" 
    choice = input("") 
    import os, sys 
    print onlyfiles[choice] 
    something = str(onlyfiles[choice]) 
    directory = "recipes" + "\\" + something 
    from itertools import takewhile, imap 
    with open(directory) as f: 
     items = list(takewhile("heading1".__ne__, imap(str.rstrip, f))) 
     print "Recipe for " + directory 
     for h in range(len(items)): #following three lines to take the list of recipe and split it by line in to instructions then display 
      print str(h)+". "+str(items[h]) 
    def getColumn(title,file): 
     result = [] 
     global result 
     with open(file) as f: 
      headers = f.readline().split(',') 
      index = headers.index(title) 
      for l in f.readlines(): 
       result.append(l.rstrip().split(',')[index]) 
      return result 

    ingredients = (getColumn("ingredients",directory)) 
    weight = (getColumn("weight",directory)) 
    measurement = (getColumn("measurement",directory)) 
    print directory 
    print "Ingredients" 
    for i in range(len(ingredients)): 
     print ingredients[i]+" "+weight[i]+" "+measurement[i] 
    input("") 

def delete_recipe(): 
    print "Delete Recipe" 
    print "Type in the number of the recipe you would like to delete, below and press enter." 
    mypath = "/recipe" 
    from os import listdir 
    from os.path import isfile, join 
    onlyfiles = [ f for f in listdir("H:/Recipes/recipes") if isfile(join("H:/Recipes/recipes",f)) ] 
    a = -1 
    for i in onlyfiles: 
     a = a +1 
     print a, i 
    choice = input("") 
    import os, sys 
    print onlyfiles[choice] 
    something = str(onlyfiles[choice]) 
    directory = "recipes" + "\\" + something 
    os.remove(directory) 

menu() 

Текстовый файл, как показано ниже:

Recipe As now 
Put sugar in bowl 
heading1 
ingredients,weight,measurement, 
Sugar,100,grams 
heading2 

Я получаю следующее как ошибка:

raspberry_pie - Copy (8).txt 
Recipe for recipes\raspberry_pie - Copy (8).txt 
0. Recipe As now 
1. fhgje 
2. fe 
Traceback (most recent call last): 
    File "H:\Recipes\Recipe Program.py", line 96, in <module> 
    menu() 
    File "H:\Recipes\Recipe Program.py", line 24, in menu 
    view_recipe() 
    File "H:\Recipes\Recipe Program.py", line 69, in view_recipe 
    ingredients = (getColumn("ingredients",directory)) 
    File "H:\Recipes\Recipe Program.py", line 65, in getColumn 
    index = headers.index(title) 
ValueError: 'ingredients' is not in list 

Answer 1

Это является переписана версия ваша программа выше. Единственное, что не работает, это добавлять рецепты. Если вам нужна дополнительная помощь, отправьте комментарий на этот ответ. Вам нужно будет создать подкаталог рядом с этой программой под названием рецепты (или что бы вы не установили имя переменной SUBDIR). Чтобы проверить, перед запуском убедитесь, что вы поместили файл raspberry_pie.txt в эту папку.

#------------------------------------------------------------------------------- 
# Name:   Recipe Holder 
# Purpose:  Hold recipes 
# 
# Author:  Ashley Collinge & Stephen Chappell 
# 
# Created:  11 July 2013 
# Copyright: (c) Ashley Collinge 2013 
#------------------------------------------------------------------------------- 

from collections import OrderedDict 
from itertools import takewhile, zip_longest 
from os import listdir, remove 
from os.path import join, isfile, splitext, basename 

#------------------------------------------------------------------------------- 

SUBDIR = 'recipes' 

def main(): 
    print('Recipe Holder') 
    print('Use the numbers to navigate the menu.') 
    options = {'1': view_recipe, 
       '2': add_recipe, 
       '3': delete_recipe} 
    for key in sorted(options, key=int): 
     print('{}) {}'.format(key, get_title(options[key].__name__))) 
    while True: 
     choice = input('> ') 
     if choice in options: 
      options[choice]() 
      break 

#------------------------------------------------------------------------------- 

def view_recipe(): 
    path = get_file('Type in the number of the recipe you ' 
        'would like to view and press enter.') 
    print('Reciple for', get_name(path)) 
    with open(path) as file: 
     lines = filter(None, map(str.strip, file)) 
     for step in enumerate(takewhile('heading1'.__ne__, lines), 1): 
      print('{}. {}'.format(*step)) 
     columns = OrderedDict((name.strip(), []) 
           for name in next(lines).split(',')) 
     max_split = len(columns) - 1 
     for info in takewhile('heading2'.__ne__, lines): 
      fields = tuple(map(str.strip, info.split(',', max_split))) 
      for key, value in zip_longest(columns, fields, fillvalue=''): 
       columns[key].append(value) 
    ingredients = columns['ingredients'] 
    weights = columns['weight'] 
    measurements = columns['measurement'] 
    assert len(ingredients) == len(weights) == len(measurements) 
    print('Ingredients') 
    for specification in zip(ingredients, weights, measurements): 
     print(*specification) 

def add_recipe(): 
    raise NotImplementedError() 

def delete_recipe(): 
    path = get_file('Type in the number of the recipe you ' 
        'would like to delete and press enter.') 
    remove(path) 

#------------------------------------------------------------------------------- 

def get_file(prompt): 
    files = tuple(name for name in 
        (join(SUBDIR, name) for name in listdir(SUBDIR)) 
        if isfile(name)) 
    for index, path in enumerate(files, 1): 
     print('{}) {}'.format(index, get_name(path))) 
    print('Type in the number of the recipe you ' 
      'would like to view and press enter.') 
    return files[int(input('> ')) - 1] 

def get_name(path): 
    return get_title(splitext(basename(path))[0]) 

def get_title(name): 
    return name.replace('_', ' ').title() 

#------------------------------------------------------------------------------- 

if __name__ == '__main__': 
    main()