Question

我正在编写一个程序，它接受字母和索引并吐出填字游戏答案（不是填字游戏解算器，而是一个帮助解决填字游戏的工具，如果有意义的话）。

我已经编写了两个版本的算法，但似乎都没有正常工作。我试过的第一个就是：

fin = open('words.txt')

def answer_finder():
    global fin
    possible_answers = []
    length = int(raw_input("How long is the word?"))
    letter_1 = raw_input("What is the first letter that you know?").lower
    letter_1_index = int(raw_input("How many letters into the word is that letter?")) - 1
    letter_2 = raw_input("What is the second letter that you know?").lower
    letter_2_index = int(raw_input("How many letters into the word is that letter?")) - 1
    letter_3 = raw_input("What is the third letter that you know?").lower
    letter_3_index = int(raw_input("How many letters into the word is that letter?")) - 1
    for i in fin:
        if len(i) == length:
            if i[letter_1_index] == letter_1 and i[letter_2_index] == letter_2 and i[letter_3_index] == letter_3:
                possible_answers.append(i)
    return possible_answers

我意识到它有点难看，但这更像是算法概念的证明。稍后将更改用户输入。无论如何，无论我尝试什么，这似乎都会返回一个空列表。

第二个版本基本相同，但依赖于嵌套的if语句而不是布尔运算符：

def answer_finder():
    global fin
    possible_answers = []
    length = int(raw_input("How long is the word?"))
    letter_1 = raw_input("What is the first letter that you know?").lower
    letter_1_index = int(raw_input("How many letters into the word is that letter?")) - 1
    letter_2 = raw_input("What is the second letter that you know?").lower
    letter_2_index = int(raw_input("How many letters into the word is that letter?")) - 1
    letter_3 = raw_input("What is the third letter that you know?").lower
    letter_3_index = int(raw_input("How many letters into the word is that letter?")) - 1
    for i in fin:
        if len(i) == length:
            if i[letter_1_index] == letter_1:
                if i[letter_2_index] == letter_2:
                    if i[letter_3_index] == letter_3:
                        possible_answers.append(i)
    return possible_answers

这也会返回一个空列表。我使用的单词列表来自here。我假设我遗漏了一些明显的东西，因为我刚开始使用外部文件。我应该指出，这些函数是前者的原型，两者都可以正常工作：

def greater_than_20():
    global fin
    li = []
    for i in fin:
        if len(i) > 20:
            li.append(i)
    return li

def first_letter_length_finder():
    global fin
    length = int(raw_input("How long is the word?"))
    first_letter = raw_input("What is the first letter?")
    li = []
    for i in fin:
        if len(i) == length and i[0] == first_letter:
            li.append(i)
    print li
    return li

编辑：仅供参考，以下是完整的代码（包括已注释掉的代码部分。）

fin = open('words.txt')
print fin

def greater_than_20():
    global fin
    li = []
    for i in fin:
        if len(i) > 20:
            li.append(i)
    return li

def first_letter_length_finder():
    global fin
    length = int(raw_input("How long is the word?"))
    first_letter = raw_input("What is the first letter?")
    li = []
    for i in fin:
        if len(i) == length and i[0] == first_letter:
            li.append(i)
    print li
    return li

def answer_finder():
    global fin
    possible_answers = []
    length = int(raw_input("How long is the word?"))
    letter_1 = raw_input("What is the first letter that you know?").lower
    letter_1_index = int(raw_input("How many letters into the word is that letter?")) - 1
    letter_2 = raw_input("What is the second letter that you know?").lower
    letter_2_index = int(raw_input("How many letters into the word is that letter?")) - 1
    letter_3 = raw_input("What is the third letter that you know?").lower
    letter_3_index = int(raw_input("How many letters into the word is that letter?")) - 1
    for i in fin:
        if len(i) == length:
#            if i[letter_1_index] == letter_1 and i[letter_2_index] == letter_2 and i[letter_3_index] == letter_3:
#                possible_answers.append(i)
            if i[letter_1_index] == letter_1:
                if i[letter_2_index] == letter_2:
                    if i[letter_3_index] == letter_3:
                        possible_answers.append(i)
    return possible_answers

Answer 1

您使用的是string.lower方法，但错过了()。

>>> letter_3 = raw_input("What is the third letter that you know?").lower
What is the third letter that you know?a
>>> letter_3
<built-in method lower of str object at 0x104e514e0>

>>> letter_3 = raw_input("What is the third letter that you know?").lower()
What is the third letter that you know?a
>>> letter_3
'a'

如果没有括号，则不是指定.lower函数的值，而是指定函数本身。

编辑：对于记录（因为我不能发表评论），使用for i in fin的方法很好，因为文件是可迭代的，由\n分隔。

Answer 2

在尝试使用数据之前，您需要先从文件中读取数据。

fin = file('words.txt').readlines ()

填字游戏解决伴侣

2 个答案: