如何从写入数组的文本文件中获取数组？

Question

下面是我的代码。我正在尝试创建一个文本文件，允许您编辑程序中使用的关键字。

words = ['bob', 'jones', 'billy', 'josh']

try:
    with open('./keywords.txt', "x", encoding="utf-8") as g:
        g.write(str(words) + '\n\n' + 'EDIT THE KEYWORDS BY ADDING OR REMOVING THE TEXT\n' + 'Make sure to add use the current format in order for it to work')
except FileExistsError:
    print('Reading keywords')
    keywords = open('./keywords.txt' , "r", encoding="utf-8")
    words = keywords.readline(1)
    print(words)

当我使用这段代码时，得到的只是 -

[

Answer 1

您可以使用 ast.literal_eval() 。将readline(1) 替换为readline()。这是代码。

words = ['bob', 'jones', 'billy', 'josh']
import ast
try:
    with open('./keywords.txt', "x", encoding="utf-8") as g:
        g.write(str(words) + '\n\n' + 'EDIT THE KEYWORDS BY ADDING OR REMOVING THE TEXT\n' + 'Make sure to add use the current format in order for it to work')
except FileExistsError:
    print('Reading keywords')
    keywords = open('./keywords.txt' , "r", encoding="utf-8")
    words = keywords.readline()
    listobj = ast.literal_eval(words)
    print(listobj)
    print(listobj[2])

打印

['bob', 'jones', 'billy', 'josh']
billy

Answer 2

这是第一次运行程序后你的文本文件的样子：

['bob', 'jones', 'billy', 'josh']

EDIT THE KEYWORDS BY ADDING OR REMOVING THE TEXT
Make sure to add use the current format in order for it to work

使用words = keywords.readline(1) 仅从行中读取 1 个字节的数据。您可以使用以下任一行来返回整行：

keywords.readline()
keywords.readline(-1)

完整代码：

words = ['bob', 'jones', 'billy', 'josh']

try:
    with open('./keywords.txt', "x", encoding="utf-8") as g:
        g.write(str(words) + '\n\n' + 'EDIT THE KEYWORDS BY ADDING OR REMOVING THE TEXT\n' + 'Make sure to add use the current format in order for it to work')
except FileExistsError:
    print('Reading keywords')
    with open('./keywords.txt' , "r", encoding="utf-8") as myFile:
        file = []
        for line in myFile:
            file.append(line)
        words = file[0]
        print(words)

输出：

Reading keywords
['bob', 'jones', 'billy', 'josh']

>>>