Question

我想返回文本文件中找到的所有单词。这是我到目前为止的代码。

def get_dictionary_word_list():
    f = open('dictionary.txt')
    for word in f.read().split():
        print(word)

它使用print fucntion但不是打印我想要返回文本文件中所有单词的单词。使用return它只显示＆＃39; aa＆＃39;而不是文件中的文字。我不知道为什么它不能使用return？

Answer 1

如果你在循环中使用了return，那么它会在第一次迭代时返回，而你只返回第一个单词。

你想要的是单词的聚合 - 或者更好的是，返回你从分裂单词中获得的数组。您可能想要清理换行符。

def get_dictionary_word_list():
    # with context manager assures us the
    # file will be closed when leaving the scope
    with open('dictionary.txt') as f:
        # return the split results, which is all the words in the file.
        return f.read().split()

要获得字典，您可以使用它（处理换行符）：

def get_dictionary_word_list():
    # with context manager assures us the
    # file will be closed when leaving the scope

    with open('dictionary.txt') as f:
        # create a  dictionary object to return
        result = dict()
        for line in f.read().splitlines():
            # split the line to a key - value.
            k, v = line.split()
            # add the key - value to the dictionary object
            result[k]  = v
        return result

要获取关键值项目，您可以使用类似的内容返回generator（请记住，只要生成器保持打开状态，文件就会保持打开状态）。你可以修改它只返回单词，如果这是你想要的，它非常简单：

def get_dictionary_word_list():
    # with context manager assures us the
    # file will be closed when leaving the scope
    with open('dictionary.txt') as f:
        for line in f.read().splitlines():
            # yield a tuple (key, value)
            yield tuple(line.split())

第一个函数的输出示例：

xxxx:~$ cat dictionary.txt 
a asd
b bsd
c csd
xxxx:~$ cat ld.py 
#!/usr/bin/env python

def get_dictionary_word_list():
    # with context manager assures us the
    # file will be closed when leaving the scope
    with open('dictionary.txt') as f:
        # return the split results, which is all the words in the file.
        return f.read().split()

print get_dictionary_word_list()
xxxx:~$ ./ld.py 
['a', 'asd', 'b', 'bsd', 'c', 'csd']

Answer 2

这个怎么样：

def get_dictionary_word_list(fname):
    with open(fname) as fh:
        return set(fh.read().split())

Answer 3

def get_dictionary_word_list():
    f = open('dictionary.txt')
    ll=[]
    for word in f.read().split():
        ll.append(word)
    return ll

尝试列表

Answer 4

只需尝试： -

def func():
    with open('new.txt') as f:
        return f.read() # returns complete file,

with open('out.txt', 'w+') as w:
    w.write(func())
    w.seek(0)
    print w.read()

Generators： -

def func():
    with open('new.txt') as f:
        yield f.read()
data = func()
with open('out2.txt', 'w+') as w:
    for line in data:
        w.write(line) #or you may use  map(w.write, line)
        w.seek(0)
        print w.read()

如何从python中的文本文件返回单词列表

4 个答案: